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Old 05-16-2015, 07:21 PM   #258
Ultramaroon
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The dyno argument is invalid because two completely different systems are being measured.

On a dyno the rotational inertia of the driveshaft makes up a larger part of the total inertia because it is being used to accelerate the roller.

In real life, it's accelerating the whole car.

Try mashing the gas in a fifth-gear pull from the same starting RPM as when on the dyno. Which one gets to redline more quickly?

The driveshaft is a tiny little part of the combined inertia. Please let it go.
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