Quote:
Originally posted by Gunter
Some more questions:
Re: Crank vs. wheel.
When HP-figures are used for "at the wheel", what gear is the transmission in?
What gear is used on a Dyno?
Thanks.
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The dyno operator needs to input all of the following cwp, gear, dynamic loaded tire radius and atmospheric conditions. If this isn't done correctly all of the #s will be biased one way or another. This is one of the ploys used to put up big #s that aren't really there.
As long as the #s are correctly entered then any gear can be used but it's best to use as close to 1:1 as possible to remove another issue, inertial drag of the driveline components, from the equations, there is far more of this in lower gears than in upper
The best most accurate #s short of an engine dyno come from Dyna-Pak dynos, they at least remove the tire from the equations and they also remove a lot of the drama that a poorly secured car on a dyno can create.