What is the smallest pully that can be used on the gm stage 2 tune, i dont wan to go too small and loose power due to iat's and maxing out the injectors so what are my options 2.9,2.85,2.8???

 

2.9!!! but i got a 2.85 and i think i lost power..but that was with a clogged cat lol

 

lol that sucks i hope i dont get a clogged cat!

 

yea it sucks lol...im getting a hi flow cat when my car gets out of the body shop

 

How about the Cobalt-Addiction SS GM STAGE 2 Replacement 2.79" Pulley? Anyone use that? Do you use the same belt that comes witht the Stage 2 kit?

 

I haven't heard of any one running that! And yes i go the stage2 gm belt if that is what you are asking.

 

Unless you want to be doing a rebuild on your motor, i wouldnt.

dont go below a 2.9 pulley on the stage 2 tune.

 

So a 2.9 is as far as i should take it unless i get a better tune.

 

any one use the cobalt addiction 2.79 pulley

 

I have the 2.8 pulley boys, that was built specifically for the GM stage 2 hub.

25000 miles, problem free.

I have 37000 miles on my car, and trust me when I say Ive driven this car HARD! atleast 10 track trips, which = 60+ runs.

Much street racing (in my past)

lead foot driver

stage 2 tune, intake, exaust, high flow cat (think I shot the catalyst out the back tho lol), high flow DP, Header, 2.8 inch pulley, etc etc etc.

Stock clutch too, just as strong a day 1.

I run 13.4's, so you can imagine the power I am making, and havent had to "engine rebuild"

I think the 2.79 would be fine, but if you go lower, you will definately need to get tuned.


I look at it like this. Stock 32 lb injectors handled 3.3 inch pulley. to go to a 3.0 (gm stage 2) 42's were needed. so dropping down to 2.8 is borderline new injectors, but you should be able to get by scott free.

 

just go 2.9....2.8 you wont see much change form 2.9. You wont strat to see high PSI gains from the 2.9-2.8 until you get the 2.7 or lower which you will need the 60#'s and a new tune...

 

Cool thanks guy's

 

stage 2 wit 2.8 with h/e and maybe dual pass should be fine right?