1 00:00:08,085 --> 00:00:10,287 Who enjoys being left out of things? Not me. 2 00:00:10,287 --> 00:00:12,356 But the test subject of our next myth 3 00:00:12,356 --> 00:00:14,057 happens to be a two-seater. 4 00:00:14,057 --> 00:00:15,326 So, we drew straws. 5 00:00:15,326 --> 00:00:18,061 And guess who gets to scope out the next location? 6 00:00:18,061 --> 00:00:21,965 I'm gonna hit the road and I'll catch y'all on the flipside. 7 00:00:21,965 --> 00:00:22,933 [clicks tongue] Enjoy this one. 8 00:00:24,568 --> 00:00:25,769 [Tory] This is like an artform. 9 00:00:28,071 --> 00:00:30,341 It's just like, making sure the steel's lining up. 10 00:00:32,075 --> 00:00:34,611 Making sure the form is perfect. 11 00:00:36,513 --> 00:00:38,549 Following the original top. 12 00:00:40,551 --> 00:00:42,919 It's more like sculpting than it is fabricating. 13 00:00:47,524 --> 00:00:48,559 Oh, she's ready to drive. 14 00:00:48,559 --> 00:00:51,162 - We got a chop top. - Yes we do, sir. 15 00:00:51,162 --> 00:00:53,264 Jim, look at how much headspace we have in there. 16 00:00:57,033 --> 00:00:58,068 [announcer] Meet the team. 17 00:00:58,068 --> 00:00:59,703 [screaming, chuckling] 18 00:00:59,703 --> 00:01:01,472 [Tory] This might be the miracle coolant 19 00:01:01,472 --> 00:01:03,240 that everybody's been searching for. 20 00:01:03,240 --> 00:01:04,975 - Oh, no! - Oh, jeez. 21 00:01:04,975 --> 00:01:06,843 [announcer] With the mechanical expertise... 22 00:01:06,843 --> 00:01:08,679 [Faye] My main concern is structural integrity. 23 00:01:08,679 --> 00:01:10,747 [announcer] To test all things automotive. 24 00:01:10,747 --> 00:01:12,683 - Oh! [chuckles] - The engine died. [chuckles] 25 00:01:12,683 --> 00:01:14,185 [Bisi] The more air we push through, 26 00:01:14,185 --> 00:01:15,452 the more fuel we siphon out. 27 00:01:15,452 --> 00:01:16,620 And boom! 28 00:01:17,521 --> 00:01:20,357 [announcer] This is Motor MythBusters. 29 00:01:20,357 --> 00:01:21,325 Hit it! 30 00:01:22,359 --> 00:01:23,427 [announcer] Where science... 31 00:01:23,427 --> 00:01:25,762 [screaming] 32 00:01:25,762 --> 00:01:27,198 [announcer] ...meets the streets. 33 00:01:30,334 --> 00:01:31,635 [upbeat music playing] 34 00:01:43,714 --> 00:01:47,218 This car is insane! Do you hear that engine? 35 00:01:47,218 --> 00:01:48,219 [engine roaring] 36 00:01:49,520 --> 00:01:51,422 [Tory] It just wants to go fast. 37 00:01:53,724 --> 00:01:55,659 But it's not just about the engine, 38 00:01:55,659 --> 00:01:59,630 it's also a lot to do with the aerodynamics. 39 00:01:59,630 --> 00:02:02,132 Back in the old days, the guys driving hot rods, 40 00:02:02,132 --> 00:02:04,868 they figured if they chopped their cars 41 00:02:04,868 --> 00:02:06,036 and lowered the roof, 42 00:02:06,036 --> 00:02:08,472 that would give 'em better aerodynamics. 43 00:02:08,472 --> 00:02:12,243 Therefore, allowing their vehicles to go faster. 44 00:02:12,243 --> 00:02:14,245 [announcer] Chopping the roof off a stock vehicle 45 00:02:14,245 --> 00:02:18,148 is a topic often talked about in hot rod forums. 46 00:02:18,148 --> 00:02:22,085 It's a technique that was first pioneered in the mid-1930s. 47 00:02:22,085 --> 00:02:24,421 [man] Believe it or not, from a standing start, 48 00:02:24,421 --> 00:02:28,259 some of these draggers would beat a jet plane down that quarter-mile stretch. 49 00:02:28,259 --> 00:02:30,126 [announcer] But did lowering a hot rod's roof 50 00:02:30,126 --> 00:02:31,528 really make it go faster? 51 00:02:33,464 --> 00:02:34,665 [Tory] So that is the myth. 52 00:02:34,665 --> 00:02:36,633 If we chop our car, 53 00:02:36,633 --> 00:02:37,968 can we get more speed? 54 00:02:40,537 --> 00:02:42,839 In order to test this, we need a vehicle. 55 00:02:44,174 --> 00:02:45,576 [Tory gasps, chuckles] Oh! 56 00:02:45,576 --> 00:02:47,511 So, Tory, I have the perfect vehicle. 57 00:02:47,511 --> 00:02:49,646 The most unaerodynamic car we have. 58 00:02:49,646 --> 00:02:52,182 The worst vehicle we have in the whole fleet 59 00:02:52,182 --> 00:02:54,285 -of vehicles on MythBusters? -[Bisi] Yeah. [chuckles] 60 00:02:54,285 --> 00:02:55,719 [Bisi] The Tradesman is perfect. 61 00:02:56,953 --> 00:02:59,290 Brake pedal. 62 00:02:59,290 --> 00:03:01,658 [Bisi] This van was used when we tested a movie scene 63 00:03:01,658 --> 00:03:03,093 about sabotaging brake lines. 64 00:03:04,060 --> 00:03:05,195 - Oh, that feels good. - Yeah. All right. 65 00:03:05,195 --> 00:03:06,830 And returns beautifully. 66 00:03:06,830 --> 00:03:08,832 [Bisi] For that myth, we moved the driver position 67 00:03:08,832 --> 00:03:11,201 and controls from the front to the backseat. 68 00:03:12,102 --> 00:03:13,870 - [Tory] Oh, my gosh! - [screaming] 69 00:03:13,870 --> 00:03:15,138 [both laughing] 70 00:03:16,773 --> 00:03:20,711 [Bisi] But this time it's going to get an even more radical makeover. 71 00:03:20,711 --> 00:03:22,313 All right. So we're gonna chop this. 72 00:03:22,313 --> 00:03:24,881 - Yes. Well-- - But first, we need to get some data. 73 00:03:24,881 --> 00:03:28,485 [Tory] To see the top speed of this big, crazy van. 74 00:03:29,320 --> 00:03:30,587 [Bisi] Yee-haw. 75 00:03:30,587 --> 00:03:32,188 [Tory] All right. Why don't we do a control test? 76 00:03:32,188 --> 00:03:34,891 We'll get this to the end of the runway, I'll floor it. 77 00:03:34,891 --> 00:03:36,560 Oh! You're going 21 miles an hour. Look at that. 78 00:03:36,560 --> 00:03:37,728 Oh, my gosh! 79 00:03:37,728 --> 00:03:40,196 [Tory] So we're going to see how fast we get up to 80 00:03:40,196 --> 00:03:41,765 in the quarter mile. 81 00:03:41,765 --> 00:03:45,802 Then we'll be able to compare results before and after we modify it. 82 00:03:47,604 --> 00:03:48,772 [Tory] Are we sure we're good? 83 00:03:48,772 --> 00:03:50,574 - Are there any more airplanes coming? - I don't, 84 00:03:50,574 --> 00:03:52,676 - I don't see anything. - Are they not? 85 00:03:54,811 --> 00:03:57,213 [Tory] Here we are on an active airport 86 00:03:57,213 --> 00:04:01,151 and let's just say that this runway is quite active today. 87 00:04:01,151 --> 00:04:02,152 [both chuckle] 88 00:04:02,152 --> 00:04:04,388 - This is exciting. - You feel that adrenaline? 89 00:04:04,388 --> 00:04:05,722 - Oh, totally. - Oh, yes. 90 00:04:05,722 --> 00:04:07,358 - Oh, it's there, right? [chuckles] - Yeah. 91 00:04:07,358 --> 00:04:09,360 [Bisi] And on the mark, you go pedal to the metal. 92 00:04:09,360 --> 00:04:12,463 I'm gonna go through the metal. Pedal to the rust. 93 00:04:12,463 --> 00:04:15,699 - Might go through the floor. - [both laughing] 94 00:04:15,699 --> 00:04:16,667 [Tory] All right. Here we go. 95 00:04:16,667 --> 00:04:19,636 [Bisi] Three! Two! One! Go! 96 00:04:19,636 --> 00:04:21,071 [engine revs] 97 00:04:21,071 --> 00:04:22,072 [Bisi laughs] 98 00:04:23,106 --> 00:04:25,241 - [Bisi] Twenty-seven, 30. - [laughs] 99 00:04:25,241 --> 00:04:27,878 - Look how long it's taking to get up to speed. - [Bisi] 40. 100 00:04:28,412 --> 00:04:29,245 [Bisi] Fifty. 101 00:04:31,415 --> 00:04:33,183 [Bisi] Fifty-nine. 60. 102 00:04:34,685 --> 00:04:37,421 Sixty-five. 67. 68. 103 00:04:39,623 --> 00:04:41,392 [Tory] 71 miles an hour. 104 00:04:41,392 --> 00:04:42,693 Whoo-hoo. 105 00:04:48,231 --> 00:04:50,133 The throttle's stuck. Bisi! 106 00:04:51,735 --> 00:04:52,636 Oh. 107 00:04:54,705 --> 00:04:55,772 [Tory chuckling] 108 00:04:55,772 --> 00:04:57,941 - That was exciting. - Throttle was stuck. 109 00:04:57,941 --> 00:05:01,111 - [Tory] I kinda feel like a near death experience. - Oh, no! Stop! 110 00:05:01,111 --> 00:05:02,646 [Tory laughing] 111 00:05:02,646 --> 00:05:03,814 - Is your heart beating fast? - No. 112 00:05:03,814 --> 00:05:05,416 - You're fine. You're fine. - That was awesome. 113 00:05:05,416 --> 00:05:07,418 - It was cool. - It was literally, it literally was like, 114 00:05:07,418 --> 00:05:08,885 Oh, my God! 115 00:05:08,885 --> 00:05:11,522 [Tory] When that throttle stuck and the brakes stopped working. 116 00:05:12,055 --> 00:05:13,824 [engine revving] 117 00:05:13,824 --> 00:05:16,026 It was like, "Oh, wow. 118 00:05:16,026 --> 00:05:18,161 The runway is almost finished. 119 00:05:18,161 --> 00:05:19,463 How are we gonna stop this thing?" 120 00:05:19,463 --> 00:05:21,197 - [engine revving] - Oh. 121 00:05:21,865 --> 00:05:23,534 Anyway, bottom line is, 122 00:05:23,534 --> 00:05:25,135 - we were hauling that-- - Yeah. 123 00:05:25,135 --> 00:05:26,537 - 71 miles an hour. - Yes. 124 00:05:27,037 --> 00:05:28,304 [Bisi] Sixty-seven. 125 00:05:28,304 --> 00:05:29,239 [Bisi] Now with two more runs... 126 00:05:29,906 --> 00:05:30,807 That's it. 127 00:05:31,207 --> 00:05:32,543 Whoo-hoo. 128 00:05:32,809 --> 00:05:34,144 Go. 129 00:05:34,144 --> 00:05:36,012 [Bisi] ...we've got all the data we need. 130 00:05:36,012 --> 00:05:37,614 [Bisi] Sixty-seven. 68. 131 00:05:37,614 --> 00:05:39,282 That's it. Quarter mile! 132 00:05:39,282 --> 00:05:41,452 All right. 133 00:05:41,452 --> 00:05:45,055 [Tory] So, now that we know our average top speed of our unchopped van, 134 00:05:45,055 --> 00:05:48,825 before we actually chop it, we should get more info on its aerodynamics. 135 00:05:48,825 --> 00:05:52,062 Oh! I have the perfect answer for that. 136 00:05:52,062 --> 00:05:54,197 - What? - So in racing, I did a lot of tuft testing. 137 00:05:54,197 --> 00:05:55,532 - Oh! - I don't know if you know what tufts are. 138 00:05:55,532 --> 00:05:58,535 - Tufts are when you put little pieces of fabric... - Yeah. 139 00:05:58,535 --> 00:06:00,070 - on the outside of the vehicle. - Yeah! 140 00:06:00,070 --> 00:06:02,873 I love using yarn, especially one that contrasts the body of the car. 141 00:06:02,873 --> 00:06:04,741 - Yeah. - Color-wise, that'll be perfect! 142 00:06:04,741 --> 00:06:07,143 And it's funny, 'cause it seems a little archaic, 143 00:06:07,143 --> 00:06:10,280 but they still use it in modern-day racing. 144 00:06:10,280 --> 00:06:12,549 Anyone who is serious about aerodynamics, 145 00:06:12,549 --> 00:06:15,519 - still today respects that particular procedure. - I love it. 146 00:06:21,492 --> 00:06:24,495 [Bisi] Now we'll use these pink tufts, 147 00:06:24,495 --> 00:06:28,131 as a weight, see what type of turbulence we see on the van. 148 00:06:28,131 --> 00:06:30,501 I know it looks like we're decorating a Christmas tree, 149 00:06:30,501 --> 00:06:34,571 but this is actually very important science business. 150 00:06:34,571 --> 00:06:37,340 [Bisi] Pink is good because it really stands off very nicely 151 00:06:37,340 --> 00:06:39,409 and as we film it allows the opportunity 152 00:06:39,409 --> 00:06:41,111 to see how we can improve 153 00:06:41,111 --> 00:06:43,079 on the aerodynamics of the van. 154 00:06:43,079 --> 00:06:44,981 [Tory] I think a huge problem you're gonna see is just, 155 00:06:44,981 --> 00:06:48,418 - right now, this is just such a big, flat surface. - Yes. 156 00:06:48,418 --> 00:06:50,286 Up to the top, you know, up to the windshield, 157 00:06:50,286 --> 00:06:52,956 you know, that means, this a wall pushing through wind. 158 00:06:52,956 --> 00:06:54,591 I think, we're gonna see a lot of problems. 159 00:06:54,591 --> 00:06:57,694 What I'd be very curious about as well is, what happens in this region, 160 00:06:57,694 --> 00:06:59,362 - so if you put tufts here... - Oh, yeah. 161 00:06:59,362 --> 00:07:01,331 - you see things standing right up? - 100%, 162 00:07:01,331 --> 00:07:03,399 - we definitely do the roof as well. - Yeah. 163 00:07:03,399 --> 00:07:06,837 [Bisi] And if we see any movement that goes upwards or downwards, 164 00:07:06,837 --> 00:07:10,541 we know we have turbulence and we need to modify the van accordingly. 165 00:07:10,541 --> 00:07:11,942 [upbeat music playing] 166 00:07:17,213 --> 00:07:18,882 All right. We're all tufted up. 167 00:07:18,882 --> 00:07:21,451 - Yeah. - We're going to see how aerodynamic this thing is. 168 00:07:21,451 --> 00:07:23,253 This van is looking pretty tuffed. 169 00:07:25,121 --> 00:07:26,056 Here we go. 170 00:07:27,891 --> 00:07:30,126 [Tory] Tracking with us is a car with a high speed camera. 171 00:07:30,126 --> 00:07:32,395 Filming at 5000 frames per second. 172 00:07:33,630 --> 00:07:36,299 To get an adequate amount of airflow over the van, 173 00:07:36,299 --> 00:07:40,070 we need to get it up to around 25 miles an hour. 174 00:07:40,070 --> 00:07:42,739 - We're getting a lot of turbulence on the top. - [Bisi] Okay. 175 00:07:42,739 --> 00:07:44,608 - Tremendous amount of turbulence. - [Tory] Yeah. 176 00:07:44,608 --> 00:07:47,143 [Bisi] As in the eddies are forming on the top there, 177 00:07:47,143 --> 00:07:49,079 the string will just pull them right up. 178 00:07:49,079 --> 00:07:50,581 - Flipping around. - Yeah. 179 00:07:50,581 --> 00:07:53,584 And then we've got a really good wind flow just on the windshield 180 00:07:53,584 --> 00:07:55,018 but I mean, that makes sense, 181 00:07:55,018 --> 00:07:56,987 - that's where most of the wind is getting pushed. - [Bisi] Of course. 182 00:07:56,987 --> 00:07:59,956 [Tory] Everywhere around the flat windshield, 183 00:07:59,956 --> 00:08:02,025 - we're getting all kind of turbulence. - [Bisi] Absolutely. 184 00:08:03,059 --> 00:08:04,294 [Tory] It's going to be interesting 185 00:08:04,294 --> 00:08:06,663 to see what the high-speed camera is picking up. 186 00:08:07,831 --> 00:08:09,666 [Bisi] We're limited to what we can see here. 187 00:08:09,666 --> 00:08:12,368 It's so critical for us to take a look at the film... 188 00:08:12,368 --> 00:08:15,105 - Yeah. - And see what our tufts are doing around the vehicle. 189 00:08:19,710 --> 00:08:21,311 All right. Before we start, 190 00:08:21,311 --> 00:08:23,479 - we're gonna look at our modern-day vehicles. - All right. 191 00:08:23,479 --> 00:08:26,617 Just to see what an aerodynamic car should look like. 192 00:08:27,517 --> 00:08:29,620 [Bisi] What's interesting is, as you see 193 00:08:29,620 --> 00:08:31,321 it's flat across all around. 194 00:08:31,321 --> 00:08:33,857 -We don't have any eddies or vortices forming, -Right. 195 00:08:33,857 --> 00:08:35,726 - which is pretty nice. - And we're definitely seeing 196 00:08:35,726 --> 00:08:38,094 a little bit of turbulence in the back here, 197 00:08:38,094 --> 00:08:40,196 - which you expect. - To be expected. 198 00:08:40,196 --> 00:08:44,768 But, I mean, this is what a aerodynamically-designed vehicle would look like. 199 00:08:44,768 --> 00:08:48,204 This is good though. Because now we're seeing how the tufts should behave. 200 00:08:48,204 --> 00:08:49,773 [Bisi] Yes. We have a frame of reference. 201 00:08:49,773 --> 00:08:51,875 - Yeah and then I can't wait to see how our van looks like. - [Bisi screams] 202 00:08:52,809 --> 00:08:55,345 - Okay. - Okay, here's our van. 203 00:08:55,345 --> 00:08:57,881 And... Look at the top of the roof, there's nothing hugging. 204 00:08:57,881 --> 00:09:00,050 Things are actually... The tufts actually move upwards. 205 00:09:00,050 --> 00:09:02,786 Yeah. [chuckles] They're just flapping all over. 206 00:09:02,786 --> 00:09:05,288 - They're like... - Yeah, they're partying... 207 00:09:05,288 --> 00:09:06,790 - [Tory chuckling] -And we weren't invited. 208 00:09:06,790 --> 00:09:09,492 [Tory] It's almost like, a flat wall. 209 00:09:11,061 --> 00:09:12,295 You know what this points to? 210 00:09:12,328 --> 00:09:15,531 Once we chop this roof, we're gonna gain significantly. 211 00:09:15,531 --> 00:09:16,833 Imagine getting rid of all of this. 212 00:09:16,833 --> 00:09:18,702 - Yeah. - The advantages we could experience. 213 00:09:18,702 --> 00:09:22,505 -[Tory] Yeah. 'Cause it will just be a big wedge. -Oh! 214 00:09:22,505 --> 00:09:27,310 You know what would be cool, is if we could actually build - a 3 - D model of the van. 215 00:09:27,310 --> 00:09:30,714 Then we could play with the shape of it and see if we can make it more aerodynamic. 216 00:09:30,714 --> 00:09:32,048 Wow. That's pretty cost-effective 217 00:09:32,048 --> 00:09:33,283 and to do that properly, 218 00:09:33,283 --> 00:09:35,385 we need to digitally scan the car. 219 00:09:35,385 --> 00:09:39,455 And then, in software, model anything we desire. 220 00:09:39,455 --> 00:09:41,024 - Yeah. - And test accordingly. 221 00:09:41,024 --> 00:09:42,558 - I like where that's going. - Yup. 222 00:09:42,558 --> 00:09:45,696 I know the perfect person to call for this particular exercise. 223 00:09:45,696 --> 00:09:46,496 - Awesome. - Yeah. 224 00:09:51,501 --> 00:09:55,071 [engine revving] 225 00:09:55,071 --> 00:09:59,075 [Bisi] In the olden days, hot rodders had to physically cut the roof of their cars, 226 00:09:59,075 --> 00:10:01,812 without even knowing if the results will be positive or not. 227 00:10:01,812 --> 00:10:06,382 Nowadays we have access to modern technology, we can digitize our vehicles, 228 00:10:06,382 --> 00:10:12,388 model them in CAD software, 3D print them and do a small-scale test. 229 00:10:12,388 --> 00:10:14,858 Now, that's exactly what we're gonna do with our van. 230 00:10:14,858 --> 00:10:17,861 To do that today, we have Martin Horton, from blupointscan 231 00:10:17,861 --> 00:10:20,931 and he's going to scan the entire vehicle and allow us to model properly. 232 00:10:22,065 --> 00:10:23,333 These are scanning targets. 233 00:10:23,333 --> 00:10:25,435 They're a five-millimeter diameter target 234 00:10:25,435 --> 00:10:29,740 and the scanner picks up the center of each one of these targets 235 00:10:29,740 --> 00:10:32,042 and assigns an XYZ coordinate to it. 236 00:10:32,042 --> 00:10:34,911 And from that, it develops what that surface looks like. 237 00:10:34,911 --> 00:10:36,046 - Very nice. - Yeah. 238 00:10:36,046 --> 00:10:38,849 - I'd love to see a test scan. - Okay, let's try one. 239 00:10:38,849 --> 00:10:42,118 So, what we can do here is set up the scanner so that 240 00:10:42,118 --> 00:10:45,255 I have all of these targets that are gonna be captured 241 00:10:45,255 --> 00:10:46,522 in the scan, 242 00:10:46,522 --> 00:10:48,859 and I'm gonna capture a surface. 243 00:10:48,859 --> 00:10:52,362 - And there's my surface. - Very nice. 244 00:10:52,362 --> 00:10:56,399 So, what would happen if I put my head into the photo when you take a scan? 245 00:10:56,399 --> 00:10:59,135 - Well, your head would get captured in the scan. - [chuckles] Oh, okay. 246 00:10:59,836 --> 00:11:01,304 - 'Kay? - Okay. 247 00:11:04,240 --> 00:11:06,609 Hey, we got it! Check it out. 248 00:11:06,609 --> 00:11:09,512 [laughing] Oh, my goodness, that's crazy! 249 00:11:09,512 --> 00:11:11,181 It captured me properly. 250 00:11:11,181 --> 00:11:13,483 - [Martin] Yeah. Yeah. - Oh, my goodness, with good detail too. 251 00:11:13,483 --> 00:11:14,818 - Oh, yeah! - Oh, wow! 252 00:11:16,519 --> 00:11:18,789 How long will it take to scan this entire vehicle? 253 00:11:18,789 --> 00:11:20,256 Probably about four hours. 254 00:11:21,357 --> 00:11:22,826 I'm gonna scan the side, 255 00:11:23,359 --> 00:11:24,260 the front, 256 00:11:25,095 --> 00:11:26,963 the roof and then the rear. 257 00:11:26,963 --> 00:11:28,999 -And stitch all of these together. -Wow. 258 00:11:31,501 --> 00:11:34,204 Well, Bisi, I have taken the model of the van that we scanned 259 00:11:34,204 --> 00:11:37,540 and so now we can modify this van in any way we want with the computer. 260 00:11:37,540 --> 00:11:38,574 That is really good. 261 00:11:38,574 --> 00:11:40,310 So, in this myth, we want to see 262 00:11:40,310 --> 00:11:44,080 if chopping the roof would help us get any aerodynamic advantage. 263 00:11:44,080 --> 00:11:46,850 So, I'm thinking about, yes, doing something standard 264 00:11:46,850 --> 00:11:47,951 and... 265 00:11:47,951 --> 00:11:50,186 old school, just to see, and it may look pretty cool, 266 00:11:50,186 --> 00:11:54,090 we chop the front and then have that section taper upwards 267 00:11:54,090 --> 00:11:55,892 - towards the factory rear. - Oh, okay. 268 00:11:55,892 --> 00:11:58,829 So, you're thinking of taking a chunk out of the A pillar, maybe a little bit of B pillar 269 00:11:58,829 --> 00:12:01,131 - and leaving the back of the van the same? - Yes, absolutely. 270 00:12:01,131 --> 00:12:02,632 So, let's see. 271 00:12:02,632 --> 00:12:05,501 How much roughly would you say are we taking out of this, on the real van? 272 00:12:05,501 --> 00:12:08,238 So, you know, I kind of still want to be able to see out the van. 273 00:12:08,238 --> 00:12:09,272 [chuckles] That's a good idea. 274 00:12:09,272 --> 00:12:10,841 So maybe,10 inches. 275 00:12:10,841 --> 00:12:14,510 10 inches or so? Let's see, we have a bit of a slant chop here. 276 00:12:14,510 --> 00:12:17,280 - [Bisi] Oh, that's perfect. - Yeah, there we go. 277 00:12:17,280 --> 00:12:20,083 - So, that's from the other side. - [Bisi] Mm-hmm. 278 00:12:20,083 --> 00:12:22,652 We can look at it. Perfect. That's roughly 10 inches. 279 00:12:22,652 --> 00:12:26,289 Nice. But I still want to explore the traditional full chop. 280 00:12:26,289 --> 00:12:28,591 - Yeah-- - So, 10 inches all across. 281 00:12:28,591 --> 00:12:32,362 Yeah, same idea. Taking roughly 10 inches out of the front A pillar. 282 00:12:32,362 --> 00:12:34,865 But now we're extending that all the way to the back. 283 00:12:34,865 --> 00:12:37,267 So we've got 10 inches, 10 inches and 10 inches here. 284 00:12:37,267 --> 00:12:39,102 - Beautiful. - Is that about what you were thinking? 285 00:12:39,102 --> 00:12:40,136 - That's perfect. - Right on. 286 00:12:40,136 --> 00:12:43,874 - Looks pretty cool. And strange. - Yeah. 287 00:12:43,874 --> 00:12:47,643 [Bisi] Now that we have our models iterations done, - we're gonna 3 - D print them 288 00:12:47,643 --> 00:12:50,881 and compare them against each other in a small-scale test. 289 00:12:55,151 --> 00:12:59,555 All right, so now it's time to pick what type of chop we're gonna do on this van. 290 00:12:59,555 --> 00:13:02,893 - So, we have our 3 - D-printed van models. 291 00:13:02,893 --> 00:13:06,262 We have the regular shape, then we have our slanted shape 292 00:13:06,262 --> 00:13:08,965 and then we just have the straight chop shape. 293 00:13:08,965 --> 00:13:10,934 We have created our own little wind tunnel. 294 00:13:10,934 --> 00:13:12,969 We're gonna put each of those shapes in 295 00:13:12,969 --> 00:13:17,073 so that way we can decide which version is the most aerodynamic. 296 00:13:18,241 --> 00:13:21,912 [Bisi] This is my smoke leak detector. 297 00:13:21,912 --> 00:13:24,247 I use it for turbo charge applications 298 00:13:24,247 --> 00:13:26,249 to see if the systems have any leaks. 299 00:13:26,249 --> 00:13:28,718 Oh, I see some smoke right here. 300 00:13:28,718 --> 00:13:30,753 So we need to fix that. 301 00:13:30,753 --> 00:13:34,490 But it's the perfect device to create smoke for our miniature wind tunnel. 302 00:13:35,091 --> 00:13:36,326 [Tory] What is it? 303 00:13:36,326 --> 00:13:39,629 - It is vape juice. - [laughs] Is that really vape juice? 304 00:13:39,629 --> 00:13:41,664 It is. Without the nicotine. 305 00:13:41,664 --> 00:13:45,001 Don't stick you head in the end of the box. 306 00:13:45,001 --> 00:13:46,469 Yeah, that looks great. 307 00:13:48,038 --> 00:13:49,940 Our home-made wind tunnel is done. 308 00:13:49,940 --> 00:13:51,841 We have our plexiglass shape, 309 00:13:51,841 --> 00:13:55,145 we have our fans that are blowing air into the tunnel. 310 00:13:55,145 --> 00:13:57,013 Then it's going through a bunch of straws. 311 00:13:57,013 --> 00:14:01,084 Now the straws are going to keep that air moving in one direction, 312 00:14:01,084 --> 00:14:03,653 which we need, so we could see our line of smoke. 313 00:14:03,653 --> 00:14:05,956 And then we have a fan at the other end of our chamber, 314 00:14:05,956 --> 00:14:07,991 that's actually pulling the air out. 315 00:14:07,991 --> 00:14:10,560 So, that way we get a nice, even flow of air 316 00:14:10,560 --> 00:14:13,496 so when we send our smoke through the tunnel, 317 00:14:13,496 --> 00:14:17,200 we can see which van shape is most aerodynamic. 318 00:14:17,200 --> 00:14:19,502 - This is our base model, we're looking at... - Yeah. 319 00:14:19,502 --> 00:14:23,573 In terms of the factory then and how it looks in its originality. 320 00:14:23,573 --> 00:14:28,011 And what we're gonna look for is that flow around the entire van, 321 00:14:28,011 --> 00:14:31,281 - better that we can see, while sitting inside the van. - Yeah. 322 00:14:31,281 --> 00:14:33,549 I feel like a mad scientist. All right. 323 00:14:33,549 --> 00:14:35,851 - You ready? - Yes, so here we go. 324 00:14:35,851 --> 00:14:38,989 - Okay. So, Tory, you see that upward stream? - Yeah. 325 00:14:38,989 --> 00:14:44,027 It hits around the wind shield and it has a large disruption just like we saw in the video. 326 00:14:44,027 --> 00:14:45,895 - Very similar. - [Tory] You know what else is happening? 327 00:14:45,895 --> 00:14:48,231 Look back here, at the back of the van. 328 00:14:48,231 --> 00:14:50,200 See, there's like a vortex being created? 329 00:14:50,200 --> 00:14:52,135 Yes, we have a lot of eddies forming back there. 330 00:14:52,135 --> 00:14:53,869 - [Tory] That's not good. - Which is to be expected. 331 00:14:53,869 --> 00:14:56,139 So, now, we are going to do another test. 332 00:14:56,139 --> 00:14:58,241 [mocking engine sound] 333 00:14:58,241 --> 00:15:02,512 So, this is the van now, that has the flat top, no rake whatsoever. 334 00:15:02,512 --> 00:15:04,814 - Standard chop. - Here we go. 335 00:15:04,814 --> 00:15:08,451 Okay, Tory, this is painfully obvious. Look what's happening. 336 00:15:08,451 --> 00:15:11,621 - Look at that. - That is beautiful! That's exactly what we want. 337 00:15:11,621 --> 00:15:15,858 [Tory] And we decreased the wind drag at the back of the van, tremendously. 338 00:15:15,858 --> 00:15:18,194 It's obvious, this is a much more aerodynamic design. 339 00:15:18,194 --> 00:15:19,229 Yeah. 340 00:15:19,229 --> 00:15:21,631 You see how that upper current flows so nicely 341 00:15:21,631 --> 00:15:23,733 and doesn't have that disruption the initial one had? 342 00:15:23,733 --> 00:15:25,335 - [Tory] Yeah. - That's very promising. 343 00:15:25,335 --> 00:15:27,837 - And if you look at the smoke, it's just rolling off... - [Bisi] Absolutely. 344 00:15:27,837 --> 00:15:30,540 [Tory] The back of the vehicle, where before, 345 00:15:30,540 --> 00:15:34,044 we saw a huge amount of turbulence right at the back of the van. 346 00:15:34,044 --> 00:15:36,079 So you're telling me, those old hot rodders were onto something? 347 00:15:36,079 --> 00:15:37,880 - [chuckles] I think so. - Oh, my goodness. 348 00:15:37,880 --> 00:15:40,916 - Okay. - All right, the last design 349 00:15:40,916 --> 00:15:43,519 we're gonna go for, is the slanted roof. 350 00:15:43,519 --> 00:15:46,222 - I'm not too excited about this one. - [Tory laughs] No. 351 00:15:46,222 --> 00:15:47,590 Only because, 352 00:15:47,590 --> 00:15:50,760 I mean, just looking at this shape, and how air will go... 353 00:15:50,760 --> 00:15:52,762 - it's still gonna hit the top of this, but... - Yeah. 354 00:15:52,762 --> 00:15:55,098 Who knows, maybe it'll help us. 355 00:15:55,098 --> 00:15:56,432 Okay. 356 00:15:56,432 --> 00:15:59,402 [Bisi] The rear dimensions are the same as the original van, 357 00:15:59,402 --> 00:16:02,072 but the front has a much lower frontal area. 358 00:16:02,072 --> 00:16:04,307 So, I'm curious to how this is gonna work out. 359 00:16:04,307 --> 00:16:05,175 And... 360 00:16:06,076 --> 00:16:07,410 [Bisi] So, we have a nice 361 00:16:07,410 --> 00:16:09,679 stream going all over the top, onto the middle-- 362 00:16:09,679 --> 00:16:11,814 - [Tory] Yeah, there's a lot of turbulence. - We have turbulence 363 00:16:11,814 --> 00:16:14,084 - from the middle. - I'm not really thrilled about this 364 00:16:14,084 --> 00:16:15,918 design, even though it looks cool, 365 00:16:15,918 --> 00:16:18,254 it doesn't seem to be helping aerodynamics. 366 00:16:18,254 --> 00:16:19,155 It does not. 367 00:16:19,155 --> 00:16:20,690 [upbeat music playing] 368 00:16:20,690 --> 00:16:24,160 [Tory] Well, right now, I'm favoring just the straight chop. 369 00:16:24,160 --> 00:16:25,495 [Bisi] I'm right there with you. 370 00:16:26,562 --> 00:16:29,199 So, the winning design is the straight chop. 371 00:16:29,199 --> 00:16:31,867 Now, I was actually hoping that this wedge chop 372 00:16:31,867 --> 00:16:33,869 would be the winner, just because it looks cooler, 373 00:16:33,869 --> 00:16:37,273 but it turns out, the old school, just dropping the roof, 374 00:16:37,273 --> 00:16:40,710 is going to be the most aerodynamic, so... 375 00:16:40,710 --> 00:16:42,112 now all we have to do... 376 00:16:42,112 --> 00:16:43,446 is do this, 377 00:16:43,446 --> 00:16:44,714 to our real van. 378 00:16:44,714 --> 00:16:50,653 [upbeat music playing] 379 00:16:50,653 --> 00:16:53,123 [Bisi] You know, Tory, I've never cut a van up before. 380 00:16:53,123 --> 00:16:55,625 - You know what, I've sheered the top off of a car. - Oh. 381 00:16:55,625 --> 00:16:56,959 - On purpose? - Yeah. 382 00:16:56,959 --> 00:17:00,130 - Driving underneath a semi-trailer. - [laughing] Oh, my God. 383 00:17:00,130 --> 00:17:02,565 But, I've never actually done 384 00:17:02,565 --> 00:17:05,301 a proper chopping of a hot rod. 385 00:17:05,301 --> 00:17:08,571 - But I know how, like I kinda know the basics. - [Bisi] Okay. 386 00:17:08,571 --> 00:17:12,041 - All right. - And so we wanna cut it down, almost ten inches. 387 00:17:12,041 --> 00:17:14,444 - [laughing] Okay. - Sorry. 388 00:17:14,444 --> 00:17:18,581 - Seriously, I mean-- - So, basically, we're gonna have... 389 00:17:18,581 --> 00:17:21,817 Like viewing of... we'll have like a six-inch 390 00:17:21,817 --> 00:17:23,553 viewing windshield. 391 00:17:23,553 --> 00:17:25,888 - I think if, you know, if we get real low... - [Bisi laughing] 392 00:17:25,888 --> 00:17:28,624 - I mean that's how hot rods did it, right? - [Bisi] Yeah. 393 00:17:28,624 --> 00:17:31,394 - That's a healthy chunk of... - Yes, it is. 394 00:17:31,394 --> 00:17:32,528 ...of cut there. 395 00:17:32,528 --> 00:17:35,165 - What if we took out 16 inches? - [laughing] What? 396 00:17:35,165 --> 00:17:37,433 - If 10 inches is good, 16 inches-- - [laughs maniacally] Oh, my... 397 00:17:37,433 --> 00:17:39,335 - 16 inches might be amazing. - Tory! 398 00:17:39,335 --> 00:17:41,237 - Like, just think about it. - Tory... 399 00:17:41,237 --> 00:17:43,273 - Just listen, hear me out, hear me out. - Okay. 400 00:17:43,273 --> 00:17:45,608 Okay, so, we have... 401 00:17:45,608 --> 00:17:48,678 - like 15 and a half inches, so we could technically... - Right. 402 00:17:48,678 --> 00:17:50,646 cut this to 12... 403 00:17:50,646 --> 00:17:53,015 - And you still have-- - And you have three inches of windshield? 404 00:17:53,015 --> 00:17:55,485 - How big are your eyeballs? You don't need to see-- - [Bisi scoffs] 405 00:17:55,485 --> 00:17:58,321 All we need to see, is the road. 406 00:17:58,321 --> 00:18:01,324 Like, look, look, all we need to do, is this. 407 00:18:01,324 --> 00:18:03,659 - Look at this. - See, here's Tory again, 408 00:18:03,659 --> 00:18:06,229 - Look... - going crazy. He's always trying to find... 409 00:18:06,229 --> 00:18:09,064 take something extreme, and even go... 410 00:18:09,064 --> 00:18:11,634 - Tory extreme with it. It's, it's... - Look at this. 411 00:18:12,368 --> 00:18:14,204 I have plenty of head room. 412 00:18:14,204 --> 00:18:16,038 Why does everything have to be crazy with you? 413 00:18:16,038 --> 00:18:17,540 Why can't you just be... 414 00:18:17,540 --> 00:18:19,675 - normal? Oh, my God. - If it's worth doing, it's worth overdoing, right? 415 00:18:19,675 --> 00:18:22,011 - When we start winning races with this van, you'll know. - [Bisi] Then... 416 00:18:22,011 --> 00:18:24,747 "Now I understand what you were talking about." 417 00:18:24,747 --> 00:18:26,616 [Bisi] Okay, you know, that's... 418 00:18:26,616 --> 00:18:29,685 - That gives us 12 inches. - It's still aggressive, but that's not as bad. 419 00:18:29,685 --> 00:18:32,522 - Twelve I'm okay with... that'll be pretty cool. - I love it. 420 00:18:32,522 --> 00:18:34,957 - Okay. Cool. - It would look so sick when we're done. 421 00:18:34,957 --> 00:18:36,559 [Bisi] So, after a bit of back and forth, 422 00:18:36,559 --> 00:18:39,895 Tory and I have decided to chop 12 inches. 423 00:18:39,895 --> 00:18:42,465 Will this be enough to improve its aerodynamics, 424 00:18:42,465 --> 00:18:45,701 and beat 71 miles an hour, in a quarter mile? 425 00:18:45,701 --> 00:18:47,937 - I'm excited. My first chop. - Me, too. 426 00:18:47,937 --> 00:18:49,872 - [Tory] All right. -[Bisi] But before we get chopping, 427 00:18:49,872 --> 00:18:51,441 we've got to get weighing. 428 00:18:51,441 --> 00:18:53,876 'Cause once we chop this vehicle, 429 00:18:53,876 --> 00:18:56,412 - our weight's gonna change, quite a bit. - Oh, totally. 430 00:18:56,412 --> 00:18:59,915 And I think it's very important that we keep our van 431 00:18:59,915 --> 00:19:04,254 - the same weight as the control test. - [Bisi] Good point. 432 00:19:04,254 --> 00:19:06,989 [Tory] That way we keep it just looking at... 433 00:19:06,989 --> 00:19:09,625 Is the aerodynamics making this van go faster? 434 00:19:09,625 --> 00:19:12,795 - [Bisi] Ah... right there, right there, right there. - [Tory] Okay. 435 00:19:12,795 --> 00:19:15,331 All right, how much does the van weigh with us in it? 436 00:19:15,331 --> 00:19:18,000 [Bisi] 4,198 pounds. 437 00:19:18,000 --> 00:19:19,569 So, we'll chop the top, 438 00:19:19,569 --> 00:19:22,004 make all the modifications, and, when we're done, 439 00:19:22,004 --> 00:19:23,706 - with you and I, in the car... - Yeah. 440 00:19:23,706 --> 00:19:26,075 - [Bisi] We need to have this as our control weight. - [Tory] Yup. 441 00:19:26,075 --> 00:19:28,344 All right, first thing we need to do is, we need to strip 442 00:19:28,344 --> 00:19:31,046 - the entire interior of the van. - [Bisi] Yes. 443 00:19:31,046 --> 00:19:34,049 [Tory] 'Cause if we're gonna be cutting this, there's gonna be sparks flying. 444 00:19:34,049 --> 00:19:37,119 - We don't wanna set the interior of the van on fire. - [Bisi] Yeah. 445 00:19:38,288 --> 00:19:40,155 [Bisi] Now that we know our weight... 446 00:19:40,155 --> 00:19:41,791 [clanking] 447 00:19:41,791 --> 00:19:44,494 [Bisi] We can take everything out, and just put the weight back in, as we need. 448 00:19:44,494 --> 00:19:45,728 [Tory] Sounds good. 449 00:19:45,728 --> 00:19:49,999 [clanking] 450 00:19:49,999 --> 00:19:51,734 So far, so good. 451 00:19:51,734 --> 00:19:55,771 [Bisi] So, right now, I notice that the front windshield is really dry-rotted. 452 00:19:55,771 --> 00:19:58,708 So, I'm gonna cut this seal on the inside, which is little more pliable, 453 00:19:58,708 --> 00:20:01,711 [Bisi] allowing me to release the pressure around the windshield, push it outwards, 454 00:20:01,711 --> 00:20:03,679 and hopefully save the windshield. 455 00:20:03,679 --> 00:20:07,617 Because we're gonna replace the glass with a polycarbonate-style material, 456 00:20:07,617 --> 00:20:10,386 and I want to use that windshield as a base, 457 00:20:10,386 --> 00:20:13,456 to form that polycarbonate, so we can have a nice shape 458 00:20:13,456 --> 00:20:14,890 to the front of the van, 459 00:20:14,890 --> 00:20:17,427 [Tory] Uh, Rose, we have some questions for you. 460 00:20:17,427 --> 00:20:19,729 We're about to start this chop, 461 00:20:19,729 --> 00:20:23,433 and neither of us have ever done like a professional chop. 462 00:20:23,433 --> 00:20:26,201 Yeah, the size makes sense, but... 463 00:20:26,201 --> 00:20:27,970 to be able to make this section, 464 00:20:27,970 --> 00:20:29,605 that's where I'm a bit confused. 465 00:20:29,605 --> 00:20:33,943 Automobiles are a football shape, so as you lower the roof, 466 00:20:33,943 --> 00:20:35,144 it's a little too narrow. 467 00:20:35,144 --> 00:20:37,447 So, we've either got to widen the top, 468 00:20:37,447 --> 00:20:39,549 or we've got to move the pillars in. 469 00:20:39,549 --> 00:20:42,785 - The plan is, we wanna take out 12 inches-- - [Rose] Oh, that's good. 470 00:20:42,785 --> 00:20:44,954 Cause when you cut these roofs, you should cut them a lot. 471 00:20:44,954 --> 00:20:46,422 - Yeah, that. See? - Oh! 472 00:20:46,422 --> 00:20:48,157 - [Tory] She agrees with me. - You're onto something. 473 00:20:48,157 --> 00:20:50,960 [upbeat music playing] 474 00:20:50,960 --> 00:20:52,562 Thanks. 475 00:20:52,562 --> 00:20:55,331 [Tory] What I'm doing right now, is just putting in some cross bracing, 476 00:20:55,331 --> 00:20:57,767 because once we cut the top of this van off, 477 00:20:57,767 --> 00:20:59,835 those walls are gonna wanna fluctuate, 478 00:20:59,835 --> 00:21:01,737 and we don't wanna loose our shape, so... 479 00:21:01,737 --> 00:21:03,739 once we have those welded in place, 480 00:21:03,739 --> 00:21:06,542 then we can start cutting our support beams. 481 00:21:06,542 --> 00:21:08,511 [Bisi] If we don't cut these structures out, 482 00:21:08,511 --> 00:21:11,246 it'll really pose a problem for us, to remove the top entirely. 483 00:21:12,181 --> 00:21:15,184 And then, we can actually do the roof chop. 484 00:21:15,184 --> 00:21:21,391 [upbeat music playing] 485 00:21:27,229 --> 00:21:29,399 My first door. [laughs] 486 00:21:32,702 --> 00:21:34,904 - [Tory] This is just a straight edge. - So you can use that to... 487 00:21:34,904 --> 00:21:38,007 - So, it'll be a nice straight cut. - Okay. 488 00:21:38,007 --> 00:21:40,843 [Bisi] I'm partial to vans and I put tons of power in them. 489 00:21:40,843 --> 00:21:43,413 I love building 1000 horsepower minivans 490 00:21:43,413 --> 00:21:45,114 but cutting the roof off of one, 491 00:21:45,114 --> 00:21:47,182 I have never, ever done that, 492 00:21:47,182 --> 00:21:48,884 even thought I'd ever do it. 493 00:21:50,252 --> 00:21:53,456 [Tory] So, we're making some great progress on the van chop. 494 00:21:53,456 --> 00:21:55,458 Once we have the entire thing cut, 495 00:21:55,458 --> 00:21:57,793 we'll drop the roof, and see how it looks. 496 00:21:59,094 --> 00:22:00,630 So, Rose is bringing the forklift in, 497 00:22:00,630 --> 00:22:03,866 - because we're at a very critical point right now, - [Rose] Coming in. 498 00:22:03,866 --> 00:22:06,669 [Tory] where the roof is actually going to 499 00:22:06,669 --> 00:22:08,471 be detached from the van. 500 00:22:08,471 --> 00:22:10,773 So, we don't want that thing just to fall on us, 501 00:22:10,773 --> 00:22:12,341 so we're gonna put the forks in, 502 00:22:12,341 --> 00:22:14,477 cut the rest of the door frames, 503 00:22:14,477 --> 00:22:16,846 and then, our front supports, 504 00:22:16,846 --> 00:22:18,313 once we're done with that. 505 00:22:18,313 --> 00:22:20,182 It's a good thing we got the forklift in place. 506 00:22:21,484 --> 00:22:23,453 [Tory] This is so cool-looking. 507 00:22:24,987 --> 00:22:27,156 This is gonna be... 508 00:22:27,156 --> 00:22:29,058 - crazy, huh? - ridiculous, I mean... 509 00:22:29,058 --> 00:22:30,926 it's gonna sit right on the dashboard. 510 00:22:32,094 --> 00:22:33,062 [clanking] 511 00:22:33,062 --> 00:22:34,196 That was a lot of rust. 512 00:22:35,230 --> 00:22:36,666 All right, you guys ready? 513 00:22:36,666 --> 00:22:38,868 [Tory] And then we're gonna start lowering that roof. 514 00:22:38,868 --> 00:22:40,536 Gonna get it to the right height. 515 00:22:40,536 --> 00:22:42,137 [Bisi] Oh, my goodness! 516 00:22:42,137 --> 00:22:46,375 [Tory] But we are at the point where this van is chopped. 517 00:22:47,677 --> 00:22:52,247 [laughing maniacally] 518 00:22:52,247 --> 00:22:54,717 That looks, oh, my God, that looks cool! 519 00:22:54,717 --> 00:22:56,752 - [Bisi] Like, that's ridiculous. - [Tory laughs] 520 00:22:56,752 --> 00:22:58,688 - [Bisi] Is that not hilarious? - [Tory] It is. 521 00:22:58,688 --> 00:23:01,557 - Tory, can you see me? - [Tory] Oh, I've got plenty of room. 522 00:23:01,557 --> 00:23:03,593 [Tory] We just got to get rid of these visors. 523 00:23:03,593 --> 00:23:05,728 [Bisi laughing] 524 00:23:05,728 --> 00:23:09,499 Well, we chopped 12 inches out, and now... 525 00:23:09,499 --> 00:23:12,301 you know, Bisi said I was crazy. I'm starting to feel like, maybe I am 526 00:23:12,301 --> 00:23:13,503 a little crazy, too. 527 00:23:13,503 --> 00:23:15,505 I only have, maybe about... 528 00:23:15,505 --> 00:23:18,508 4 inches of windscreen 529 00:23:18,508 --> 00:23:20,843 [Tory] to see out of, but, I don't know, 530 00:23:20,843 --> 00:23:22,678 this might actually work. 531 00:23:22,678 --> 00:23:24,580 - [Bisi] Wow. - [Tory laughing] 532 00:23:24,580 --> 00:23:26,849 I don't think I have said as many wows in my life, as I have today. 533 00:23:26,849 --> 00:23:28,818 - Yeah, you've been saying wow. - Wow, wow, wow! 534 00:23:28,818 --> 00:23:33,355 - Bisi, you've been wowed by this whole thing. - Yes, I have been. 535 00:23:33,355 --> 00:23:35,858 [Tory] So, now that we've cut out 12 inches from our pillar, 536 00:23:35,858 --> 00:23:38,327 the pillars don't match up any more. 537 00:23:38,327 --> 00:23:41,263 So, what we need to do, is actually cut the roof, 538 00:23:41,263 --> 00:23:42,732 [Tory] into couple of sections... 539 00:23:43,533 --> 00:23:45,768 [upbeat music playing] 540 00:23:45,768 --> 00:23:48,203 [Tory] ...bring them out, so the pillars line up. 541 00:23:48,203 --> 00:23:51,541 [upbeat music playing] 542 00:23:51,541 --> 00:23:53,042 [Tory] Let's just make it a convertible. 543 00:23:53,709 --> 00:23:55,444 Weld those... 544 00:23:55,444 --> 00:23:58,347 We gotta make sure all of our angles are lining up, 545 00:23:58,347 --> 00:24:00,883 so this thing goes back together beautifully. 546 00:24:01,717 --> 00:24:03,252 - Look at that. - So, imagine... 547 00:24:03,252 --> 00:24:05,788 - Imagine it's a nice, summer day... - Oh, yeah. 548 00:24:05,788 --> 00:24:08,390 - [laughing] - Can you just sit lower? 549 00:24:08,390 --> 00:24:10,926 - Oh, yeah. - That's what I'm talking about. [laughing] 550 00:24:11,226 --> 00:24:12,762 Whoa! 551 00:24:12,762 --> 00:24:16,465 [Tory] Then we have to put pieces of steel in between our gaps. 552 00:24:17,967 --> 00:24:22,371 [Bisi] These pieces allow for adhesion of the center section 553 00:24:22,371 --> 00:24:24,273 to the outer sections, and... 554 00:24:24,273 --> 00:24:27,643 I had the opportunity to curve them using a hammer and anvil, 555 00:24:27,643 --> 00:24:30,613 to allow for a nice curvature, so it can follow the same lines 556 00:24:30,613 --> 00:24:34,083 as the top of the van. 557 00:24:34,083 --> 00:24:37,386 [Tory] Meanwhile, Rose is using the planishing hammer to shape 558 00:24:37,386 --> 00:24:41,957 the largest two pieces that will fill in the bigger sections of the roof. 559 00:24:41,957 --> 00:24:46,061 Yeah this gives it strength, so, that's you know, it's dent resistant. 560 00:24:46,061 --> 00:24:47,897 So, it has dimensional stability. 561 00:24:47,897 --> 00:24:49,632 So, it gives it a little bit more structure. 562 00:24:49,632 --> 00:24:50,900 - Yeah. - Good. 563 00:24:50,900 --> 00:24:53,969 [upbeat music playing] 564 00:24:53,969 --> 00:24:55,470 [Tory] It's just like an art form. 565 00:24:55,470 --> 00:24:58,841 It's just like, making sure the steel's lining up, 566 00:24:58,841 --> 00:25:03,245 making sure the form, the top of the van, is perfect, 567 00:25:03,245 --> 00:25:05,447 following the original top. 568 00:25:07,049 --> 00:25:09,919 It's more like sculpting than it is fabricating. 569 00:25:09,919 --> 00:25:15,157 [upbeat music playing] 570 00:25:15,157 --> 00:25:16,358 [Bisi] Oh, she's ready to drive. 571 00:25:16,358 --> 00:25:18,628 - We got a chop top! - Yes, we do, sir. 572 00:25:19,695 --> 00:25:22,431 Dude, look at how much head space we have in there. 573 00:25:22,431 --> 00:25:24,867 That's plenty of room to see. 574 00:25:24,867 --> 00:25:27,870 [Bisi] Our steering and pedals go back to the original position, 575 00:25:27,870 --> 00:25:30,239 and the seats are bolted to the floor. 576 00:25:31,807 --> 00:25:35,210 [Tory] So, this is all about aerodynamics and it's not about weight. 577 00:25:35,210 --> 00:25:37,546 3,952. 578 00:25:37,546 --> 00:25:40,716 [Tory] We need to make sure it weighs the same as it did 579 00:25:40,716 --> 00:25:41,917 before we chopped it. 580 00:25:41,917 --> 00:25:43,285 All right, what are we at, Bisi? 581 00:25:43,285 --> 00:25:46,321 We are 4,228. 582 00:25:46,789 --> 00:25:47,757 [clanking] 583 00:25:47,757 --> 00:25:48,791 [Tory] How about now? 584 00:25:48,791 --> 00:25:50,660 [Bisi] 4,199. 585 00:25:50,660 --> 00:25:52,962 - [Bisi] I'll take it. 4199. - Close enough. 586 00:25:52,962 --> 00:25:55,665 [Bisi] I christen her... Ruster. 587 00:25:55,665 --> 00:25:57,366 Ah, I love it. 588 00:25:57,366 --> 00:25:59,534 - How's that? - [Tory] Perfect. There you go. 589 00:25:59,534 --> 00:26:03,673 [dramatic music playing] 590 00:26:03,673 --> 00:26:06,108 - [Tory laughs] -[Bisi] Wow! 591 00:26:06,108 --> 00:26:09,979 -[Tory] This thing is so cool-looking. -[Bisi] It's beautiful. 592 00:26:09,979 --> 00:26:11,714 [dramatic music playing] 593 00:26:11,714 --> 00:26:16,018 [Tory] I have built vans in my time, but nothing this exquisite. 594 00:26:16,018 --> 00:26:18,120 And, I thought when we said we're gonna chop this van, 595 00:26:18,120 --> 00:26:19,288 it was gonna be as easy as 596 00:26:19,288 --> 00:26:21,290 - take out a section, drop the roof... - [Bisi] Oh, no. 597 00:26:21,290 --> 00:26:22,692 [Tory] Weld it back, and we're done. 598 00:26:22,692 --> 00:26:25,360 I had no idea how much work this was gonna take, 599 00:26:25,360 --> 00:26:27,296 but hopefully, it's gonna pay off. 600 00:26:27,296 --> 00:26:29,064 [Bisi] Well, there's only one way to find out. 601 00:26:29,064 --> 00:26:30,833 Take it to the tarmac, and see what happens. 602 00:26:30,833 --> 00:26:33,135 I love it when a van comes together. 603 00:26:33,135 --> 00:26:36,772 - I pity the fool who doesn't like this van. - [both laugh] 604 00:26:38,507 --> 00:26:40,575 [announcer] Does size matter, or not? 605 00:26:40,575 --> 00:26:42,011 They're about to find out. 606 00:26:42,011 --> 00:26:44,714 With the top of the van now 12 inches lower, 607 00:26:44,714 --> 00:26:47,182 it's time to discover whether chopping the roof off 608 00:26:47,182 --> 00:26:49,719 really does make a vehicle go faster. 609 00:26:49,719 --> 00:26:52,021 But first they're gonna re-do the tuft test, 610 00:26:52,021 --> 00:26:56,425 to compare the van's pre and post chop aerodynamics. 611 00:26:56,425 --> 00:26:59,729 - All right, Bisi, the chop is done. - Yes. 612 00:26:59,729 --> 00:27:02,597 - We have the tufts on it. It's time to do a run... - [Bisi] Absolutely. 613 00:27:02,597 --> 00:27:05,735 To see if our chop helped us, or hurt us. 614 00:27:05,735 --> 00:27:08,237 Yes, we saw some good results in a small-scale test. 615 00:27:08,237 --> 00:27:10,439 Now, we can monitor what happens 616 00:27:10,439 --> 00:27:12,141 in real life! 617 00:27:12,141 --> 00:27:14,343 - All right, you ready to do this? - I'm ready, sir. 618 00:27:14,343 --> 00:27:15,410 [engine starts] 619 00:27:15,410 --> 00:27:17,446 - [Tory] All right, here we go. - [Bisi] All right. 620 00:27:17,446 --> 00:27:19,581 [engine revving] 621 00:27:19,581 --> 00:27:21,784 - Might help to put it in gear. - That would help a little bit. 622 00:27:21,784 --> 00:27:23,218 [laughs] 623 00:27:23,252 --> 00:27:25,554 [Tory] Like before, we're being tracked by a high-speed camera. 624 00:27:26,355 --> 00:27:27,589 [Bisi] Oh, wow! 625 00:27:27,622 --> 00:27:30,492 [Bisi] Oh, look at that. So, initially, with the old body, 626 00:27:30,492 --> 00:27:32,762 - we saw a lot of turbulence on top. - [Tory] Yeah. 627 00:27:32,762 --> 00:27:33,829 Everything's laying flat. 628 00:27:33,829 --> 00:27:35,530 - Remember we had a lot of disturbance before? - Yes! 629 00:27:35,530 --> 00:27:38,033 -All on the roof before they were flapped around... -It's just laying flat. 630 00:27:38,033 --> 00:27:39,334 [Tory] And now they're laying flat. 631 00:27:39,334 --> 00:27:41,670 Look at our windshield. Beautiful. 632 00:27:41,670 --> 00:27:43,305 I mean, that's hopeful for us. 633 00:27:43,305 --> 00:27:45,174 I think we're in the right path, Tory. 634 00:27:45,174 --> 00:27:47,209 [dramatic music playing] 635 00:27:47,209 --> 00:27:49,945 Let's see if this changed the aerodynamics. 636 00:27:49,945 --> 00:27:51,546 [Bisi] Wow, Tory, look at that. 637 00:27:51,546 --> 00:27:54,349 [Tory] That shape actually has made a difference. 638 00:27:54,349 --> 00:27:56,318 [Bisi] Initially, when the van was in factory form, 639 00:27:56,318 --> 00:27:59,521 we saw a significant amount of turbulence, on the roof of the van... 640 00:27:59,521 --> 00:28:02,024 -[Tory] Yeah. -[Bisi] telling us that it didn't do very well 641 00:28:02,024 --> 00:28:04,226 -in allowing us to cut through the wind easily. -[Tory] Yeah. 642 00:28:04,226 --> 00:28:06,461 - And now, all that-- - And now, everything's just laying flat. 643 00:28:06,461 --> 00:28:08,097 - They're all laying flat. - Oh, my goodness. 644 00:28:08,097 --> 00:28:11,466 [Bisi] It's like we've almost created a wedge to cut through the air. 645 00:28:11,466 --> 00:28:13,702 [Tory] A beautiful, aerodynamic wedge. 646 00:28:13,702 --> 00:28:17,306 I'm excited because, this is now mimicking the aerodynamic profile 647 00:28:17,306 --> 00:28:18,941 - of a modern car. -[Tory] Yeah. 648 00:28:18,941 --> 00:28:21,977 [Bisi] That means, what we saw on the small scale, translated very well, 649 00:28:21,977 --> 00:28:25,114 -to real life. -[Tory] Which also means, that might translate 650 00:28:25,114 --> 00:28:27,917 - to us getting a faster speed. - [Bisi] Can we do it? 651 00:28:27,917 --> 00:28:29,551 - Ready for the real test? - I'm so ready. 652 00:28:29,551 --> 00:28:31,921 [dramatic music playing] 653 00:28:31,921 --> 00:28:34,289 [Tory] If we get a faster speed, 654 00:28:34,289 --> 00:28:35,825 than 71 miles an hour, 655 00:28:36,625 --> 00:28:39,461 this is a completely confirmed myth. 656 00:28:39,461 --> 00:28:40,495 I agree. 657 00:28:41,330 --> 00:28:43,432 [Bisi] Chop top, final test. 658 00:28:43,432 --> 00:28:44,733 Quarter mile. 659 00:28:44,733 --> 00:28:45,634 Three. 660 00:28:45,634 --> 00:28:46,668 Two. 661 00:28:46,668 --> 00:28:47,636 One. 662 00:28:47,636 --> 00:28:49,171 - [Bisi] Hit it. - [engine accelerating] 663 00:28:50,139 --> 00:28:51,974 [both exclaiming] 664 00:28:51,974 --> 00:28:53,308 [suspenseful music playing] 665 00:28:53,308 --> 00:28:55,477 C'mon, baby! 666 00:28:55,477 --> 00:28:57,012 [Tory] You can do it. 667 00:28:57,012 --> 00:28:58,180 [Bisi] 49. 668 00:28:58,180 --> 00:28:59,181 50. 669 00:28:59,181 --> 00:29:00,950 [engine accelerating] 670 00:29:00,950 --> 00:29:02,384 - [Bisi] 60. - [Tory] C'mon! 671 00:29:02,384 --> 00:29:04,253 [suspenseful music playing] 672 00:29:04,253 --> 00:29:07,522 - [Bisi] Are we gonna do it? - [exclaiming excitedly] 673 00:29:07,522 --> 00:29:08,690 [Tory] We're gonna do this! 674 00:29:08,690 --> 00:29:11,026 - [both exclaiming] - [Bisi] That's good! 675 00:29:11,026 --> 00:29:12,761 - [Bisi] We did it! - [Tory] That's great! 676 00:29:12,761 --> 00:29:15,697 - We went 6 miles per hour faster. - I will take it. 677 00:29:15,697 --> 00:29:18,533 - I will take it. I will take that. - [whooping triumphantly] 678 00:29:18,533 --> 00:29:20,202 [announcer] And, after two more runs... 679 00:29:20,202 --> 00:29:21,436 [Bisi] That's good! 680 00:29:21,436 --> 00:29:22,938 [whooping triumphantly] 681 00:29:22,938 --> 00:29:25,074 -[Tory] It's crazy! -[Bisi] Oh, my God! 682 00:29:25,074 --> 00:29:26,541 Three, two, one. 683 00:29:27,542 --> 00:29:28,911 [announcer] ...it's a done deal. 684 00:29:28,911 --> 00:29:30,379 [Bisi] You can do it! 685 00:29:30,379 --> 00:29:32,681 [announcer] Chopping, and lowering this van's roof... 686 00:29:32,681 --> 00:29:35,017 - [Bisi] Oh, my goodness! - We confirmed it. 687 00:29:35,017 --> 00:29:37,352 [announcer] ...has made it quicker. 688 00:29:37,352 --> 00:29:39,454 Those old timers knew what they were talking about. 689 00:29:39,454 --> 00:29:42,591 - Chopping your car will make you go faster! - [Bisi] Absolutely! 690 00:29:42,591 --> 00:29:44,159 - That's great! - [Tory screams] It worked! 691 00:29:45,060 --> 00:29:46,628 - [Tory laughs] - [Bisi] Wow! 692 00:29:46,628 --> 00:29:48,697 That was crazy! 693 00:29:48,697 --> 00:29:49,899 I can't believe it. 694 00:29:49,899 --> 00:29:51,566 Ruster did it. 695 00:29:51,566 --> 00:29:55,037 [Tory] All we did is, we just chopped it and brought it down by 12 inches. 696 00:29:55,037 --> 00:29:57,272 And that gave us a faster speed. 697 00:29:57,272 --> 00:29:59,374 You're absolutely correct. The van weighs the same, 698 00:29:59,374 --> 00:30:02,144 [Bisi] same driver, same low horsepower power plant, 699 00:30:02,144 --> 00:30:04,813 six miles an hour is a big deal. 700 00:30:04,813 --> 00:30:06,481 - I'll take that. - [Tory] Yes. 701 00:30:06,515 --> 00:30:10,119 [Tory] And the thing is, in a race, any little bit of advantage you can take, 702 00:30:10,119 --> 00:30:11,120 - you'll take it. - Right. 703 00:30:11,120 --> 00:30:13,088 - So, we had to confirm this myth. - Yes! 704 00:30:13,088 --> 00:30:15,257 Those old hot rodders, they were onto something. 705 00:30:15,257 --> 00:30:16,658 - They knew what they were doing. - Awesome. 706 00:30:16,658 --> 00:30:18,827 - Good job. - That was a lot of work. 707 00:30:18,827 --> 00:30:20,629 [Tory] Let's go see if we can find people to drag. 708 00:30:20,629 --> 00:30:22,264 Oh, they won't know what's coming. 709 00:30:22,264 --> 00:30:26,635 [dramatic music playing]