1970 Chevy Chevelle SS 454 drag racing 1970 Buick Gran Sport 455 Stage 1. Pure Stock Muscle Car Drag Race. Factory Stock Drag Race.
First car is a 1970 Chevrolet Chevelle Super Sport, the other a 1970 Buick Gran Sport. The Gran Sport has the top engine, a 455 Stage 1 rated 360 horsepower. The Chevelle also has the top engine, a LS6 454 rated 450 horsepower. The LS6 Chevelle 454 and the Stage 1 Buick both have TH400 3-speed automatic transmissions. Rear gearing in the Buick GS455 is 3.73, while the Chevelle SS has 4.10. The Buick is heavier, weighing 3950 pounds including the driver. The '70 Chevelle is coming in at 3848 pounds, including the driver. There were only 1785 total 1970 Buick GS Stage 1 with the TH400 produced in 1970. On the other hand, there were 4475 total LS6 equipped vehicles from Chevrolet in 1970 (this includes all Chevelles and El Caminos). Hot Rod tested a LS6 Chevelle in May of 1970 and it ran the quarter mile in 13.44 seconds @ 108 mph (4-speed manual, 4.10 gears). Motor Trend tested the Stage 1 Buick in January of 1970 and it ran 13.38 seconds @ 105.5 mph, and at the time that was the quickest car they had ever tested.... even quicker than the Hemi Cuda from a few months earlier that ran 13.78 seconds in the quarter mile.
Pure Stock Muscle Car Drag Race (PSMCDR). FAST Factory Appearing Stock Tire factory stock. Super Car Drag Race.
Remember, both cars participate in the Pure Stock Muscle Car Drag Race series, so please check out their website: www.psmcdr.com
Also make sure you find them out on Facebook.
The rules for PSMCDR are listed below:
For 1955 to 1979 musclecars built in United States and Canadian assembly plants with a minimum warranty of 12 months and 12,000 miles.
Any car running faster than 11.50 will be disqualified and will not have a qualifying time recorded.
Any convertible running faster than 13.50 will be disqualified and will not have a qualifying time recorded.
Casting numbers must be correct for the year and horsepower claimed including intake manifold, heads, and exhaust manifolds. Blocks do not have to be "numbers matching," but they must be the correct displacement. Overbores up to .070" are allowed. Stock cranks only.
All Engines -CR 1.5 extra points allowed over advertised.
The camshaft must be correct for the year, model, and horsepower claimed for the type of lifter (hydraulic or solid). Roller cams NOT allowed.
The valve train must be factory stock for the year, make, and horsepower claimed.
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.
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!
Cast-iron exhaust manifolds are mandatory and must be correct for the year, model, and horsepower claimed. Internal modifications to the exhaust manifolds are NOT allowed. Under no circumstances will headers be allowed, including those cars that came with headers delivered in the trunk. Pipes must be routed as they were originally for the year, make, model, and engine combination. Mufflers must be stock looking in design, that is, oval in shape. No glasspacks or straight pipes allowed unless installed as original equipment. Maximum muffler inlet and outlet size is 2.5 inches. X & H pipes allowed.
The radiator must be correct for the year, make, model, and horsepower claimed. No lightweight, aluminum radiators allowed.
The camshaft must be correct for the year, model, and horsepower claimed for the type of lifter (hydraulic or solid). Roller cams NOT allowed. Duration at .050" lobe lift must be within 1% of factory specs. Lift at the valve must be within 2% of factory specs. Maximum stall limited to 2200 rpm.
The transmission must be correct for year, make, model and engine of the car. 3-speed manuals 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.
Reproduction tires or radial tires only.You are allowed to run tires one size over stock.
Factory wheels only.
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