need help guys whats the safest size pulley to run with the gm stg 2 kit and the pulley size on the stg 2

 

Without cooling mods we havent had anyone blow a motor on 2.9. I would suggest not going any lower than 2.8 if you really want to push it.

 

when i had my stg 2 i was runnin a 2.85, it ran perfect.. had it like that for almost 6 months or so until 60's and smaller went on lol would push about 16-16.5 psi at top of third gear..

 

thanks guys i want to keep my warranty i have had a few issues with the car a pulley swap is no biggie for me i plan on the dual pass later... i guess i'll be goin to a 2.9 side note my a/f is fat as hell around 10.5 or so just lookin to lean it up a bit

 

it wont lean it up.. from what i have read countless times from people on this site, it will just work the injectors harder.

i would read up on it. i am just going to put together my own kit and get it tuned with a 2.9

 

it only leans up the A/F ratio if the injectors go past their capacity. If you go over 100% efficiency, you will lean up the A/F ratio.

When you lean to much, the temp in the combustion chamber gets way to hot, causing melting of the internals or blowing the motor

 

it should lean it out

 

A lot of people on here go 2.9 with a stage 2 flash, but when they are hooked up to hpt, some of them are running past the injector efficiency. I would not go smaller than a stage 2 pulley. I like to be more safe than sorry. If you do, make sure you get some cooling mods.

 

sell ur 42's get 60's and get a 2.8" pulley

 

^^ yep, run 2.9. i have a nates 2.9 pulley FS if interested