So I was thinking that would be my next step to free up a little hp, I know, nothing huge. i am just trying to get as much as I can out of this engine. I want to keep the same diameter pulleys (power steering and alternator) just light weight. Does anyone have these? Is it just a waste of time/money? Recomondations of brands? Also, I don't plan on changing the underdrive pulley just for reliability reasons, unless someone suggests otherwise.
All help/opinions appreciated.

 

I have thought about that too...but my dad wouldnt let me. Anyways, I know alot of people use AEM for their pulleys. Since you just purchased OBX headers, then check into their pulleys. I know they have just started making them along with fuel rails in the same colors as AEM. Dont know about the power gains or anything though.

 

Unorthodox Racing makes and OEM series pulley, you maintain your diameter on all of them but they are Lightweight Billet aluminum and I think it's around $250 (give or take..) for the set, they make a good product

 

Thanks guys!

 

does the rotating mass of that small a pulley really make a noticeable difference? I wouldnt think it would be worth 250 to someone who isnt squeezing the last little bit out of an engine, OR going for the show portion of the engine bay upgrades. I agree they look nice.

 

rotating mass weighs more than flat weight.... there was a big discussion about this a while back but basically for every 1 pound of rotating mass you have 3-7 lbs of weight (depending on your belief's) so if you drop 5 lbs off your pulleys you're actually dropping 15-35lbs off your drive train which transfers to more horsepower at the rear because of less drag... how much you ask? You could probably safely estimate 1-3HP... So in and of itself not a huge gain but when it's coupled with lightweight flywheels and other engine mods it does help/add up... Also, in certain classes of SCCA racing it's one of the few allowable changes... Every little bit helps!