Thread: under drive pulleys

I think Jen was thinking of just the crank pulley, where the smaller pulley would still rotate the same speed as the larger.

true, but if its lighter, it has less rotation mass and even if its spinning at the same speed it has less rotation mass so it spins more freely?

its the same thing with lighter flywheels if you have a 20lb flywheel and 10lb flywheel they both are going to be rotating at 1k at idle. there wont be any speed increase obviously.

but the lighter flywheel has less rotation mass to it spin more freely

lighter pullies,lighter flywheel, lighten rotation assembly all woring together to rev quick.. of course im sure you all know that

Correct, I was talking about size only.

haha blu missed the point

i understand that but even at the same size pullies, and the stock pulley is 5lbs and the aftermarket is 1lb the less rotation mass will make some kind of difference on the rotation assembly

no, there is no way for the consult data to know what the machanicl timing is set at.

Classic, did you get these bad boys yet??

Yeah, I want to know how they turn out..........I have been looking for a set.

thermoblocks came today. header and pulleys should arrive tomarrow.


my pistons come whenever "JDMPowerdS13" from the other forum respondes to my PM's...................2 weeks and nothing

I'm anxious to see your take on these pullies.