Thread: What would i have to do to safely run a 3.0 inch pulley?

Originally Posted by silverbullet

i'm running 3.1 right now just to be on the safe side until it warmer so i can have trannyman retuning it. hopefully i get full size ic before then so i can drop down to 2.9 pulley. my mods: xp, pp heads with L32 valves, 3.29 gear, zzp input, N* tb, ported inlet/outlet blower, ported lim, 42.5 injectors, cai, pacesetters, and 3" exhaust.

The heads make a lot of difference in what size pulley you can run. I have basically the same set up as you but w/o the P&P heads and I can only go 3.25 on the pulley.

Goal - WOT 17 - 18* timing, 11.6 AFR and NO KR with my mods = 3.25