1969 Chevy Yenko Camaro vs 1969 Chevy Chevelle COPO – Factory Stock Drag Race
Our first car is a 1969 Chevrolet Yenko Camaro. The other a 1969 Chevrolet Chevelle COPO. Both cars feature a L72 427 V8. Yenko rated their car at 450 horsepower, but Chevrolet rated the COPO Chevelle at 425 horsepower. Both cars have the same transmission… a 3-speed TH400 automatic. The 1969 Chevelle and the 1969 Yenko Camaro also have the same rear gears, that being 4.33. The COPO Chevelle curb weight (driver NOT included) is 3635 pounds. The weight of the Yenko Camaro WITH driver is 3796 pounds. Yenko only produced 201 total Camaros in 1969, and only 30 of those were equipped with the automatic transmission. The 1969 COPO Chevelle was also rare with only 323 produced in 1969, while 96 had automatic transmissions. A Yenko Camaro was tested by Super Stock and Drag Illustrated in July of 1969; that car was on street tires, but did utilize a set of headers. It ran the 1/4 mile in 12.59 seconds @ 108.07 mph.
Remember, both cars participate in Factory Stock class through F.A.S.T drag racing. Make sure you visit their website. https://www.fastdrags.com.
Here are the Factory Stock rules:
For 1955 to 1979 muscle cars built in United States and Canadian assembly plants with a minimum warranty of 12 months and 12,000 miles.
Automatic Transmissions: The transmission and torque converter must be correct for the year, make, and horsepower claimed. Shift improver kits are allowed. After-market shifters are not allowed. No manual valve bodies. No lightweight internal components allowed.
Manual Transmissions: The transmission must be correct for the year, make, and horsepower claimed. 3-speeds may be upgraded to the correct 4-speed if originally available.
The rear axle must be of the same manufacturer as the car. Any gear ratio is allowed. Driveshaft safety loops are mandatory on all cars 13.99 and faster!
Must be factory correct for the year, model, and horsepower claimed. Dealer installed engines and dealer performed engine modifications are not allowed. Casting numbers must be correct for the year and horsepower claimed including intake manifold, heads, and exhaust manifolds. Modifications are prohibited. Blocks do not have to be “numbers-matching,” but they must be the correct displacement. Overbores up to .070″ are allowed. Stock cranks only. NO strokers! Random P&G checks are possible. Compression may be increased to the greater of NHRA allowable stock blue print or 1.5 over advertised compression. NHRA
The battery must be retained in the original location and securely fastened down with the original style hold down. The charging system must be fully operational at all times.
Fuel System and Carburetor:
The carburetor must be correct for the year, make, and horsepower claimed. Jetting and metering changes are permitted. THE CHOKE ASSEMBLY MUST BE IN PLACE AND FUNCTIONAL!
The complete valve train must be factory stock for the year, make, and horsepower claimed. Rocker arm ratio must be correct for the year and horsepower claimed. Roller tip rockers allowed as long as correct ratio is used.
The camshaft must be correct for the model, year, and horsepower claimed for duration, lift, and type of lifter (hydraulic or solid). No roller cams allowed.
Cast iron exhaust manifolds are mandatory and must be correct for the year, model, and horsepower claimed. NO internal modifications to the exhaust manifolds are allowed. Under no circumstances will headers be allowed, including those cars that came with headers delivered in the trunk. The exhaust system may be upgraded to a maximum of 2.5-inch head and tail pipes.
The ignition system must be stock, including the distributor, cap, coil, and wires. Points may be replaced with any electronic conversion that fits under the stock distributor cap.
Front Suspension: Stock springs and shocks must be retained. Drag springs and shocks that allow excessive lift during launches are NOT allowed.
Rear Suspension: Traction devices are limited to hop-stop bars for the upper control arms on coil-spring cars. Pinion snubbers and clamping of springs are allowed on leaf-spring cars.
Tires & Wheels:
Reproduction tires or radial tires only. No soft compound tires of any kind allowed. Retread tires are not allowed. Use of traction compounds or rubber-softening chemicals on tires are strictly prohibited.
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