Originally Posted by No1Piranha
Thanks for the feedback. I see ASP, Needswings, Renntech and LET pulleys referenced on these boards? Probably a whole other thread, but any pluses one over the other or with specific sizes? I'm assuming a 10-12% increase in max S/C speed is probably within or close to the tolerances that these were built for -- beyond that who knows. I'm guessing that should equate to another 1 1/2 to 2 lbs of boost -- maybe +35 hp at the crank w/o heat soak issues. But I'm not really clear how that lines up with the different size pulleys that I see referenced.
Rentech, EVO, ASP & LET offer a 178mm Pulley (14% boost) - I believe the Needswings pulley is an ASP pulley he offers in a package but I am not sure. With the exception of LET they all use the stock dampener where LET uses a fluid dampener. (actually it's pretty trick).
LET also offers a 181mm Pulley (16% boost) and a 185mm Pulley (20% boost) - I'm installing the 185mm pulley as I write - just waiting on a idler pulley spacer that LET forgot to ship with the pulley kit. Keep an eye out - I will have a write-up on it soon. I does look
trick - totally different engineering then the other pulleys.
I have a Saturday Appt with the Dyno/Tuner that I hope I can keep.