Originally posted by "mustang23"
Dynojet says that gearing affects HP on their dyno. I say if it does, their program is flawed. Before starting the dyno pull, you hook up a tach signal to the computer. The computer then calculates the rate of change between the motor accelerating, and the dyno accelerating. That is why there should be no difference in the HP shown based on gearing.
Dynojet program is correct and reflects a real world situation. If you looked at total work done at the wheels you would see its actually less with a higher numerical gear. This is also true at the drag strip. Many times...if traction is not an issue, guys will drop a mph or two when going to 4.10s from 3.42s. Of course the ET is better due to a better launch. Thats the real benifit of the mechanical advantage gained by going with a higher numerical gear ratio. Everything is a trade off.
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