Quote:
Originally Posted by sweetbmxrider
You are right in thinking how you are but for a manufacturer to rate given parts at a required amount of hp would cause chaos when owners had their car's dynoed and the numbers were low. See 99 cobras. Also, when rpm increases in the drivetrain, more heat/friction occurs so more power is required to move said parts. So you may need 20hp to turn a 4l60e at 1500rpms but you need 50hp to move the same 4l60e at 5000rpms. So, a general percentage keeps the world sane 
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But what about in a situation where you are not turning any more RPMs? As an example -- let's say the motor is supercharged. Now the motor is going from 285 to let's just say 385, would you expect the same loss to the wheels as you would from the car in stock form?
... or am I thinking too deeply into this now?