the gtp needs a bigger pulley! lot of kr up top!

Great vid but that gtp has gotta be knockin hard core.

I did what you did with a 3.0 pulley too. I learned the hard way to replace my pistons. Car still ran like crap after I replaced the bad piston. Runs great now with the newer motor and PRJ Performance tune.

no I believe the smallest reccomended pulley on a stock gtp of that year would be a 3.5. A 3.4 in u need a cai colder plugs and tstat

i can hear the engine already... BOOM!

knock knock. whos there? your pistons chipping away! gona need a new motor soon with that 3.0 pulley

Wow, a 3" pulley on an otherwise stock GTP... Not smart dude. The smallest recomended on that setup would be 3.4". That pulley is probably robbing you big. Im running a 3.3" currently, and thats with Full exaust(headers back), Cammed up the valve train, and PCM tuned for that cam. I have other supporting mods, but i still get KR on occasion.

Yeah David you need to take that 3'' pulley off there IMMEDIATELY, and put the stocker back on there until you can get some supporting mods for even a 3.4. You need supporting mods before you start swappin pullies...and just so you know, any pulley smaller than 3.1'' REQUIRES an intercooler and bigger injectors. My gtp has Headers, VS Cam, and a tune..and i'm only running a 3.2'' pulley. If you keep that pulley on your car and continue to go WOT you won't have your motor for much longer...trust me. I know alot about these cars and how to mod them so if you have any questions just let me know. X a billion !!!!!

haha i agree... i have a mildly modded gtp and only running a 3.2...