hey guys i'll be getting my new cobalt ss/sc within two weeks. im going to be putting the stg 2 and 2.8 . what modifcations would i need to run a 50 shot with this??? and how much WHP would i be getting. thanks

 

Make sure its a wet shot. Also colder plugs and a progressive controller would be good. The controller will allow you to ramp in the nitrous when you know you have traction. FJO makes some good ones.

 

FJO???? and would i need one step colder or two step colder??? do you know how much hp i would have???

 

http://www.fjoracing.com/index.php has a lot of good supporting mods for nitrous.

If you wanna know peak horsepower, I guess just add up the mods a bit. Dyno graph will tell you how fast the car actually will be though.

 

1 Step Colder Plugs is a must.

And you should run a bit less timing than stage 2 (like stock timing), if you don't have HPT this could be tough to do. You could probably hack something up by modifying the IAT1 signal.

I have run a 50 shot with the stage 2 timing and I got some KR and it seems to have none with the stock timing maps. I would say if you keep an eye on that and adjust accordingly.

To run a 75 you definetly need stock timing.

I ran a 50 shot on a hot dyno with stock timing and had NO knock.

Most nitrous kit instructions will tell you know to run nitrous with a hopped up tune, like the GMS2 because they increase the timing which isn't something you want to do while running nitrous. BTW I actually run a 50 shot on my car so I am speaking from my limited experience.

 

back off timing with nitrous.. good rule is 4 degress per 100 shot

 

The zex instructions say:

0 degrees for 50 shot, however with GMS2 your timing is increased over stock so you really need to go back, I would love to seea GM stage 3 PCM calibration and see what there timing maps do.

 

not sure of there instructions.. just rule of thumb from working with it on ponys

what did you dyno btw with your setup?

 

zinner didnt you put down like 300whp.