What pulley can I use with the gm stage 2 tune, without running my injectors over 100% idc. I have a dual pass end plate intercooler with option b, and a methanol inejction setup trunk mounted from aem. I will also be adding a heat exchanger, 35shot of nitrous, and an intercooler sprayer for the heat exchanger.

I know a lot of this is unnecessary, but you have to admit, when you open up the trunk and see two 10lb bottles of nitrous, and a methanol kit, your jaw will drop haha.

But, im wondering what pulley I can use without "hurting" my injectors. SOON I will be dropping to a 2.8 and 60lbers and a tune, but my tuning guy will not be back to tune me until mid july.

Would I be "safe" running say a nates 2.9 pulley, or would that be to much. I need to be on the SAFE SAFE SAFE side guys. I do not want to push the limits of anything until AFTER the tune.

 

You should be safe with those cooling mods on a 2.9 but I would just wait for the tune. The 42's might not be able the NOS and with meth you will run pig rich without a tune.

 

Oh trust me, I don't plan on running the nos without a tune lol. I am getting professionally dyno tuned in the beginning of july. Just trying to get all the ducks in a row. Also just curious to see what i can get out of the 42lbers lol.

 

Honestly i would run a stg2 pulley just my opinion

 

2.9 seems to be an "okay" option.... but I ran a 2.85" on a tune from Area47!

 

if i lived near area47 i would have him tune my car, however i do not. So with that being said i think i will just stick with the stage 2 pulley and wait until i move up to 60lbers and a 2.8inch pulley along with the tune from the dyno shop. Can't wait to see what kind of numbers I put down then.

 

yep that is what I would do!

 

This thread may be useful to you:
https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/problems-2-9-pulley-116424/

 

sput - thanks, that sums it all up. My next mods are going to be a heat exchanger, 60lbers, 2.8inch pulley and a custom tune. However I have to wait for the injectors, pulley, and tune until mid july when my tuner gets back.

How exactly does tuning work at a dyno shop. I mean..there going to install the pulley and install the injectors and then what...get it on the dyno and see what needs to be changed? Is it dangerous to run a car on a dyno without having things changed or what?