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3.3 pulley



Depends. Gen 3 or Gen 5? At least plugs, headers, CAI, maybe a little PCM tuning (might be forgetting something) and slowly downsize while checking for KR.
Djudge1970
 
I think most have pretty much proven that a CAI on the supercharged application does nothing but mentally make you feel like it's doing something. Placebo kinda thing. Makes you hear the whine better. The amount of heat added by the supercharger is outrageous.

A 3.3 will require probably Autolite 104's, headers, cam/rockers more than likely, and a decent tune. Even then, you might still have knock.

I have a Gen 3, Comp Cam Xtreme Energy cam, 105# springs, some tuning, a 3.4" pulley, and I still see knock. But that's because something is screwed up somewhere and I can't seem to find the issue...

But do ALL the maintenance first before doing any mods.

As you pulley down, check for knock. If you start seeing knock at any time, that pulley is probably too small. If the knock is small enough, it may be able to be tuned out. Just play it safe and keep the knock as close to 0 as possible or you risk an engine.
 
JDrach runs a 3.2 on his xp setup. It's all about getting a good tune too. I should have been able to drop a size when I did my cam, but I have some other issue causing knock. 3.3 on a gen III is easily achievable with headers and a cam.
 
ILoveGM said:
JDrach runs a 3.2 on his xp setup. It's all about getting a good tune too. I should have been able to drop a size when I did my cam, but I have some other issue causing knock. 3.3 on a gen III is easily achievable with headers and a cam.
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Yeah, I see the same knock on my 3.4 as I see on my 3.2 on my setup. My cam is similar to the XP, slightly different. We think I might be floating valves possibly =/
 


tomtom123 said:
Yeah, I see the same knock on my 3.4 as I see on my 3.2 on my setup. My cam is similar to the XP, slightly different. We think I might be floating valves possibly =/
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I think my fuel pumps starting to go, sadly. I can't check the fuel pressure under boost, just at idle.
Edit: So I basically have no rock hard evidence to support that claim lol
 
Oh yeah, I also had a pump go bad. Replaced it with an "oem" for my 99gtp and now I have 70psi at idle and am told thats too high. So Idk lol
 


Yeah i think ill stick with a 3.4 currently running a 3.5 with ubend, plog, al104s, zzp 1.0pcm, 180tstat, cai. Thats all I can remember... Ill get some headers and just stick with the 3.4 for the meantime
 
a tune will help it out alot-adjusting the proper fuel and timing. im running a 3.3" with meth injection, VS cam, front p-log, 3" DP and u-bend. im maxing my stock injectors (255lph fuel pump) with 17.5* timing.
 
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