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1970 Chaparral 2J
About this creation





Design & Build

After I completed the Ferrari 512M, I was anxious to get started on another project. I researched many different cars, both street and race, and eventually came across the Chaparral 2J. With its gleaming white and aluminum exterior, boxy design, and innovative aerodynamics, the car just jumped out at me and the look of it simply seemed perfect to be built in Lego.

Although the car seems relatively simple on the outside with its slab-sides and flat planes, it actually posed unique challenges. These included the snot technique for the "skirts" and to cover the rear wheels, the front mounted radiator and associated ducting, the taper of the front fenders, and of course the rear end. The rear was a particular challenge because of the fans, and the part of the car that I wanted to have the least compromise as it is the centerpiece of the 2J. My choice for "fans" were limited, luckily though, the classic Lego wheels were sized just right, and they came in white!

My original concept was to build it as a curbside model, that is, without an engine. However, when I completed the car, I couldn't just leave it without a powerplant. So I went back in and fully modified the rear chassis and bodywork to accept the engine. The engine itself is very interesting as it is actually two engines: The V8 power unit and a small two cylinder snowmobile engine to drive the fans. Of course, fitting all this within the confines of the car while keeping as much detail as possible was a challenge, albeit a entertaining one.

The whole car was built with accuracy as the prime concern. I took great care to maintain dimensional and detail correctness to ensure a scale model-like final presentation. It certainly was an enjoyable build and I hope you enjoy it as well!

Please feel free to comment or ask questions.

Specifications (Dimensions in studs)
Total Part Count: 720 (approx.)
Length: 35
Width: 17
Height: 8

Chaparral 2J Background

The Chaparral company was begun in Texas by engineer and driver Jim Hall. Since his first Can-Am (Canadian-American) race in 1968, he was always an innovator when it came to racecars, including the then still little understood area of automotive aerodynamics. The Can-Am series was a perfect place for his company to experiment with different technological innovations. He was the first to use inverted wings on a racecar to create downforce. He later found that if he attached the wing mounts directly to the wheel hubs, he would be transferring 100% of the aerodynamic force straight to the wheels. Hall also invented the "flipper" wing which was a driver adjustable wing. Needless to say, he had a profound effect on racing as a whole.

After several years of racing in the Can-Am with different models of his Chaparrals, he made the 2H. A wild concept that unfortunately was not competitive. Luckily, in the late 1960's, Chevrolet was working on an aerodynamic test vehicle. Chevrolet contacted Hall about using it, and the car became the Chaparral 2J; just in time for the 1970 season.

The Chaparral 2J was a radical car, even by today's standards. Rather than using a large rear wing, (adjustable wings had been banned by now), it used two rear-mounted fans to literally "suck" the car onto the road. The fans were driven by a gearbox mounted two cylinder Rockwell snowmobile engine. This was supplemented with clear Lexan side "skirts" that sealed the underbody from external high pressure. In doing this, the car developed a very strong area of low pressure under the car, more than it could only on its own. So it is not surprising that even on its first outing, the 2J set the fastest lap of the race. Unfortunately, brake problems didn't allow it to finish. This lack of reliability would be a recurring theme for the 2J. The reason for the unreliability is simply because the car was conceived of as a test car, not a racecar. Despite it obtaining pole position on several occasions, it never finished a race. Throughout the season, Hall's competitors, chiefly McLaren, argued that the fans were indeed moveable aerodynamic devices; whereas the drivers complained about debris being thrown at them through the fans, leading to the 2J being banned from racing. Disagreeing with the governing body's decision, Hall left sports car racing and focused on other endeavors. With his exit, the series lost a truly colorful team which led the way in racecar engineering.

Chaparral 2J Specifications

Engine: Mid-mounted 7.6L Chevrolet V8
Suspension: F: Independent wishbone with coil-over dampers, anti-roll bar
R: DeDion axle, coil-over self-leveling dampers, anti-roll bar
Brakes: Four-wheel vented discs
Transmission: Rear drive, automatic 3-speed
Chassis/Body: Aluminum monocoque with fiberglass body

Reference

Can-Am Photo History by Pete Lyons
http://www.ultimatecarpage.com/car/91/Chaparral-2J-Chevrolet.html




















Comments

 I like it 
  April 29, 2012
Hi, I'm new to Mocpages, and when I saw your Chaparral I imediately wanted to make one myself, so could you make some insructions so I could make it. Thanks!
 I like it 
  November 11, 2010
Woah. Does it have rear wheels? Anyway, it's awesome with the rocket looking thing behind.
 I like it 
  November 11, 2010
FANTASTIC WORK.APSOLUTE DETAIL!!! You should checkout the RED BULL'S X1 PROTOTYPE www.gran-turismo.com
 I like it 
  November 10, 2010
Wow, that thing is perfect, amazing job, super cool car!!!
 I like it 
  November 10, 2010
cool.SPEED I AM SPEED
 I like it 
  November 10, 2010
Boy, that "thing" is kind of ugly! I mean the real one... you model is absolutely perfect, though (which means NOT ugly!). When I saw your page I googled for some pics of the real car: perfect resemblance! The "turbines" on the rear, the front - just perfect! Oh, did I already mention it's perfect? Like the engine, just perfect... OK, now keep them coming, I really like your detailed OCs. Greetings, Jens
 I like it 
  November 10, 2010
Perfect job!
 I like it 
  November 10, 2010
This is amazing! it looks exactly like the real thing!
 I made it 
  November 10, 2010
Thank you for your comments! The "skirts" are touching the ground, as are all four wheels. I designed it this way because the gap that the real car has between the skirts and ground is so minimal that it would not have been feasible to recreate it on such a small scale.
Quoting Anthony Dunne Nice work on this car! This car looks exactly like the photos you linked us to! Is the creation touching the ground, or is it just super low? The bodies shaping is just incredible. The front wheel wells is really true to the real car. I really like how you built the front-end using the convex corner slopes. You did an excellent job on building the turbine-like pieces on the back. The engine is very beautiful, and well-detailed. Also very nice work on building the clear part of the car- the windshield, and part of the spoiler. The interior is even like the picture of the real car! This car is really accurate and well-built. Great work! Keep building! -Anthony Dunne
  November 10, 2010
Nice work on this car! This car looks exactly like the photos you linked us to! Is the creation touching the ground, or is it just super low? The bodies shaping is just incredible. The front wheel wells is really true to the real car. I really like how you built the front-end using the convex corner slopes. You did an excellent job on building the turbine-like pieces on the back. The engine is very beautiful, and well-detailed. Also very nice work on building the clear part of the car- the windshield, and part of the spoiler. The interior is even like the picture of the real car! This car is really accurate and well-built. Great work! Keep building! -Anthony Dunne
  November 10, 2010
a-m-a-z-i-n-g!!!
 I like it 
  November 10, 2010
Wow! Very well built! Chaparrals are always such crazy cars :) Well replicated and insane car! Great work, 5/5!
 I like it 
  November 10, 2010
AAAAaaaaa I love this one. Looks very dangerous:-)
 
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LEGO models my own creation MOCpages toys shop 1970 Chaparral 2JLarge scale vehicles


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