Tuesday, June 23, 2009
Originally Posted: Saturday, April 27, 2002
Dyno Day at the Vette Doctors
Dyno Date: 04/27/02
Dyno Location: The Vette Doctors, 26 Elm Place, Amityville, NY 11701, (631) 841-0779
Make/Model: 2002 Chevrolet Corvette Z06
Exterior Color: Millennium Yellow
Interior Color: Black Leather
Engine: LS6 5.7L V8, 405HP
Options: Every option available.
Mileage during dyno: 790
Performance Mods: None - Stock Dyno Runs
Outside Temp: 58�
Oil Temp: Approx. 198�
Coolant Temp: ??
Gas: 2 week old 93 octane Amoco.
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About The Vette Doctors Chassis Dyno (copied from The Vette Doctors Site):
Our Chassis Dyno
The Vette Doctors test all types of race cars, street rods, street machines and trucks on our computerized chassis dyno. Our stationary in-ground dyno allows quick vehicle mounting of rear and front wheel drive vehicles for testing.
About Dyno Testing
The chassis dynamometer accommodates an entire vehicle and allows operation of its power train while the vehicle remains stationary. The car is securely attached to the dyno with tie-down devices the drive wheels sit on metal inertia drums. The dynamometer design features 48" diameter, knurled, precision balanced drums. The 48" drums provide stable contact for the tires eliminating unnecessary slippage and tire deformation resulting in precise repeatable results every time. The drums are connected to the dyno measuring system to test drive wheel output.
A combination of two laws of physics, force equals mass times acceleration and work equals force times distance, gives us this equation: W=m X a X d. "W" is the work (in pound-feet) the rear wheels are doing, "m" is mass equivalent (the drums), "a" is acceleration (increasing drive wheel speed) and "d" is distance (drum circumference). Once we have the work, we can find horsepower.
Torque can be figured by multiplying the horsepower by a constant, 5252, then dividing that product by the speed at which the thrust force was measured.
Un-Corrected vs. Corrected Horsepower
Always ask what correction factor was used to calculate the data when judging various performance products on the basis of dyno test results.
E-mail: z06 (at) fastz (dot) com