safe pulley size for my mods

[rscamaroboy89]

ok so nobody has to look in my sig heres my mods-borla cat back,intake,180 thermostat,zzp pcm,u-bend delete,resonator delete,3 inch high flow cat,3 inch cutout,zzp shift kit,zzp poly mounts.and i have headers with a 3 inch downpipe on the way and 104 autolite plugs,i will be getting an aeroforce scanguage before dropping to any pulley.i just wanna get an idea of whats the smallest pulley i can run for best performance with the most timing and be safe.i already have a 3.4 to put on and i think thats all ill be able to run,but is a 3.3 out of the question? thanks for any reply's.

[BNaylor]

Based on your mods especially after the headers 3.25". Just to be safe check for any possible knock retard (KR) after all mods are completed. I ran a 3.25" pulley for street use for a few years and many other GTP owners have done the same.

[rscamaroboy89]

wow i never expected to be able to do anything close to a 3.25.my car didnt have knock when it was stock so i was lucky,thanks for the reply.

[CrazyHorst]

This obviously doesn't answer your question but if you can get some 102 octane fuel an easy 40+bhp is possible in stock form....

...of course you'd have to work on improving your spark advance curve while checking the ESC activity....but I've seen it done.

[BNaylor]

Originally Posted by CrazyHorst

This obviously doesn't answer your question but if you can get some 102 octane fuel an easy 40+bhp is possible in stock form....

...of course you'd have to work on improving your spark advance curve while checking the ESC activity....but I've seen it done.

Thats quite possible. You can get 100+ octane unleaded race gas and blend it with what is in the gas tank for special occasions. The 3.25" pulley can be good for 30+ hp. He has a ZZP PCM module which means the spark advance curve and power enrichment tables are modified versus stock. They are programmed to support 3.25" pulleys with no problems.

The other overlooked mod is intake. The bigger 72mm throttle bodies make a difference. Also, internal supercharger mods like step/polish and porting. And for the ones that can afford it or decide to go that route an intercooler.

[rscamaroboy89]

my local track has race gas,not sure if its unleaded though.i do plan on getting an intercooler in the near future,and while its off porting the supercharger and lower intake,i want something thats streetable but runs low high 12's low 13's and id be happy,idk if my setup will get me close to that but i plan on going that far.im sure ill need more advice from you guys before i get there,thanks for all the help.