I got a stock cobalt, with a CAI. I would like to put a modular pulley system on th S/C, but i do not want to over boost it. I do not have the funds for a stage 2 at the moment so i am going with the pulley system. Now what size pulley are you guys running on a stock tune?

i am thinking about getting the pulley system from modern performance, with a 3.00 pulley.
That will give me a gain of 3-3.5 over stock is that safe? and if it is can i go with a smaller pulley.


thanks guys

 

I would also like to know who has a modular that i can put a stock size pulley on

 

with a 3 inch u will need 42lb injectors with harness and a tune....

 

what size pulley do u suggest?

 

none with out getting bigger injectors and a tune

 

i agree with that but would still like a modular pulley system with a stock size pulley so that when the fund present themselves i can upgrade

 

dont see why you can just replace the stock size pully for the same size with a different system i dont think it would hurt any

 

i'm not aware of a modular system with a stock size bolt on pulley, i suppose u can have one made tho...

 

well i figure if its a 4 or 5 bolt hub i could get a nates pulley in stock size with the required number of holes

 

just dont do it, bad idea.

 

i have read that people have been running a smaller pulley without a tune.

 

cuz they are idiots, dont b one of them! just wait until u have the money- in the long run u will be saving money, just think what it will cost to replace a fried piston!

well then **** yea u can do that, it wont hurt at all. but if u get it , get a 5 bolt those 4 bolts dont look as nice!

 

Well here is the thing the pully and injectors that are stock on the car are pretty much maxed as far as the stock injector and stock pully goes yeah you probably herd that people get a smaller pully without a tune but here is the deal on the GM stage 2 kits the tunes are really rich more fuel then air so like me i bought a 2.9 pully and gunna switch out my GM stage 2 one which is a 3.09 inch pully and since my tune is gm stage 2s tune its rich i can run my 2.9 with out leaning my car way out but on the other hand i am gunna get a custom tune for my car even though i really dont have to hope this explains it for you

 

Well, people will tell you otherwise, but I ran a 3" pulley on stock tune for a few months with no problems. Then, just get stage 1 and a stage 2 belt and you have stage 2. I can't say that it looks great on paper as far as IDC, but your A/F will be ok and the car will run fine, at least mine was like that. If you plan on getting the stage kit though, I'd say hold off until you are ready to do it soon, and do them both within a short time. You see much more of a gain by having the tuning and fuel and more RPMS to really use the power.

Or, just buy Stage 1 and put a 2.8 on it, and skip all the stock size and 3" pulley steps.

 

I ran a 3.2" on the stock tune for a few months without any problems

 

see what we are talkin about /\ /\ /\... dont do it, just play it safe when u got the money.

 

I know a guy who can make a modular pulley system of any size, including stock!

 

See there is hope just gotta know the right people and Nate is a great guy/pully seller

 

What kinda gains are you looking for? If your going to do Stage 2 eventually just wait it out until you have the money. If you start modding half-assed you will **** your car up.

 

Can't imagine who that could be mine came in the mailthe other day Thanks Nate

 

Really, with the stock tune it won't make much difference at all what size pulley you run. The stock tune will limit you to 12~12.5lbs of boost. You'll get there a little faster, but it won't really make much difference.

 

guess i'll wait for the stage 2

can i really get a stage 1 kit then just buy the belt? don't i need the stage 2 tune & injectors?

 

The injectors are included in the Stage I kit, and the tunes are identical.

The Stage II kit adds the shorter belt and pulley hub and pulley.