99 Black Bird T/A

iTrader: (4)

Do crank underdrive pullies hurt the durability of the engine over time?

I've asked this before (not on this board) but never really got good answer. I've asked a SAM school grad, he said it won't hurt IF the motor was properly balanced, however if the engine isn't well balanced over time it could.

The bottom line: Is the typical factory stock block LS1 or LS1 with heads and cam balanced well enough that a lighter underdrive pulley won't hurt the engine over the long haul?

I've been thinking ASP but I don't want to buy something that might tear the engine up.

Thanks

99 Black Bird T/A

iTrader: (4)

ttt

Someone has to have insight into this with the experience on this board.

Damian

iTrader: (89)

As long as your pulley in correctly installed, SEATED PROPERLY, and not damaged you should have no problems.

I ran a set of ASP pullies on my 98 for over 20K without one single problem.

Go for it!

Josh

99 Black Bird T/A

iTrader: (4)

Thanks.

A friend and I pulled the stock pulley on a LT1 and replaced, I feel like we do it right. I'll order an underdrive pulley this weekend.

Jackyl_30

I have ran my pulley over 2 years now and I have no problems either.