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So if Jake Raby is seeing a 4% swing on manuals, how is a chassis dyno machine going to know how to accurately calculate drive train loss?
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The dynos that show flywheel HP gathered at the rear wheels have always been a joke to me. The drivetrain losses are calculated through a wizard thats no where near accurate for the drivetrain of a Porsche. On top of that, the ones I've seen before allow the user to put what ever figure they want in for a drivetrain loss and the software moves the curve. Its a real good way to cheat.
Numbers gathered at the rear wheels should always be just that. They should not be converted to some wild guess drivetrain loss correction.
If you want flywheel HP numbers, gain those from an engine dyno.
The quickest way to slow a car down is to use a dyno to gather the wrong data, for the wrong reasons.
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