subeone

iTrader: (5)

Got my drain welded in the timing cover and i already had a powerbond underdrive pulley so the fitting cleared perfectly. Now the issue is, I was recently told by "someone" who worked at ATI that underdrive pulleys are no good with boost. Now first thing I thought was, eh sounds like BS, BUT I rather spend a couple of minutes researching this before I discard it. Unfortunately, didn't come up with anything. Anyone here have any experience with this?

Thanks

ttls1coupe

I make 1004hp with a under drive. I'm sure ur good

subeone

iTrader: (5)

what brand and how much underdrive? i got a 25% underdrive.. but yea im also thinking ill be fine just wanted to make sure.

93camaro_zzz

iTrader: (13)

I would have to say that taking advice from a specific company that says "Oh, all of the other competing products are bad" is generally a pretty biased opinion. lol. So good idea on researching. I too am making 931whp on a cheap 25% ASP underdrive pulley. Should be fine.

thompson

iTrader: (4)

Since the setup is going to be turbo charged I see no issue with running the underdrive pulley you have.

Aaron@ThompsonMotorsports.net

coltboostin

Did you ask "Why"? This was we could at least be entertained by their BS!

subeone

iTrader: (5)

Wow glad to hear these answers. I was told because you have less mass to dampen the cranks vibrations due to the extra power I might break my timing chain, oil pump, or even snap the crank. Did further research and found that my pb underwrite pulley is heavier than stock so I feel a little better now.

93camaro_zzz

iTrader: (13)

Hahaha, I have never even heard of someone snapping the crank, besides supercharged cars. That is a good laugh.