I have Gm Stage 2 as of right now. I am not gonna be able to get it tuned...so should i get a 2.9 pulley or stick with the 3 inch? Is there a big difference between the two?

 

u dont got a stock you got a stage 2 pulley its a 3 inch

 

crap....thats what i meant

 

.... the stage 2 pulley is 3.06. I have a nate's 2.9 and I only gained ~.5psi so I'm at 15lbs with it but it does "spool" alot faster with the lighter pulley.For the money it is deff worth it.

 

what about the sound difference...noticeable?

 

well stage 2 whine is def louder than the stock pulley prob not muc of a difference

 

Sound? I wasn't able to notice a diff as far as the supercharger whine but I was surprised because it did slightly change my exhaust note. ...for the better but still not much of a diff.

 

so what else will help get more whine besides pulley and CAI...anything?

 

if you want to go faster get an exhaust from head to back let her breathe

 

i mainly want better sound but the exhaust sounds like crap

 

you could port the sc. Both on the intake end and the lil triangle outel thing y on the bottom (im at work so no pics for example), but then you would need tuned for moving more air. You could fill the silencer holes on the bottom of the sc. But yeah basically pulley down and cai are all that is gonna make it louder.

 

CAI and 2.9 are plenty-a-loud

 

The 2.9 pulley definately gets you to maximum boost a lot faster and it does make the supercharger a lot louder. It basically makes the car a lot torquier, but without a front mounted heat exchanger, 60 lb injectors and a tune it is useless. I am speaking form experience. When I put the 2.9 on on the stage 2 tune and ran LEAN LEAN LEAN!!!!

 

I'm also on the GM stage 2 tune and I have three pulley sizes: stage 2, stage 3 (2.99) and nates 2.90.

From what I've noticed, the smaller pulley you go, the more knock retard I see on my interceptor and more timing gets pulled. It's hard to tell whether the knock retard is greater than the gains seen by going to a smaller pulley for me, but on the other hand there's barely even a 1 psi of boost difference between them. So why push it, right?

So I guess in my opinion it's not entirely worth it to drop to the smallest pulley just to go "a little faster"

I do plan on getting the stage3 pcm in the near future so I've settled on leaving the stage 3 pulley on so that I dont have to pulley swap along with my pcm swaps for track days.

 

i knwo this is kinda off topic but what size is the stock pully 3.5?

 

3.35 i believe

 

2.8 Ftw!

 

tell you what brandon. come over here and race me or Matt.

He has: Stage 2, 2.8, K&N intake, and short throw.
I have: Stage 2, 2.9, K&N intake, short throw, GMPP exhaust, tweaked tune w/ 1st gear boost limit.

then you will know what to do. pully down, or stay with what you have.

 

just wonderiing im seriously thinking bout going back to stock and i was ganna see if they made on the stock side to bolt up to the hub of zzp. i was getting 50 mpg nearly when i was stock and tuned but when i put the 60's and 2.8 power did go up so did sound but it drinks like a v8 now lol

 

haha thats pretty funny eco...so you want me to come over there and show you how to drive? lol