Quote:
Originally Posted by Tcoat
I think the whole "By the way, where did you get your engineering degree?" is pretty rude actually.
No disputing that the reduction of rotating mass will make a difference. The bigger concern for the sake of the subject at hand is how big a difference. Saving 4 ounces on a light weight pulley is NOT going to make a difference that is even measurable on any form of test equipment outside of a major lab. I doubt you could reduce the weight (at least with any form of budget in mind) of enough rotating components in the engine these cars to make a measurable difference much less the claims of some that the car "comes alive".
The physics is one thing, the application of them at the level of lightweight pulleys is another.
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Indeed, your pulley discussion is correct in that you won't be able to measure the small amount of power freed up by using a slightly lighter pulley. It's simply not that large of a component in terms of diameter or mass.
But dropping 10 lbs off your flywheel, especially if the mass is removed from the outside diameter of the flywheel, will make a small but measurable difference. Likewise, dropping a couple pounds off each wheel/tire will make a small but measurable difference.
The reason I challenged the original post is because the following statement
"It is NOT POSSIBLE to get "more hp" by reducing the rotating mass of the engine or drivetrain.
It does not Make more HP or "free up" more HP.
Removing weight from the rotating mass will give you the exact same benefits as removing that same weight from anywhere else on the car."
is simply not correct. Lowering the rotational mass of the drive train will most definitely "free up" HP that is then available to provide higher linear acceleration to the vehicle.
Cheers!
