Ok everyone i recently purchased an 2006 colbalt ss supercharged. The thing flies ,hits 150+mph without hesitation , it doesnt bog down amd i still dont have the pedal to the floor. It has an aem air/fuel meter....a random switch installed below my stereo where other colbalts have a 12v outlet, also ive read stuff about cruise control button working with ecu tunes?....the cruise control does not work. Ive never owned a tuned car but this thing was so clean so i had to buy it. There is a smaller silver pulley coming off off supercharger which is an upgrade i know just not sure which stage... im not sure the fuel injectors have been replaced. Also has after market intake flowing from supercharger directly down and behind driverside headlight.help please!!!

 

Pic of engine bay might help.

Silver pulley isn't GM, so it probably isn't a generic stage kit.

Injectors could be anything, close up pics may help us identify them but if it's not going lean I wouldn't worry about it.

The intakes all go down to the bumper, even stock.

The random switch could be anything, I had my nitrous arming switch in the lighter location but I'm sure it's not my old car... unless the last 8 of the VIN are 67676833

 

I doubt it has a "stage" tune on it and it has an hptuners tune on it.

 

Stage tunes are done with HPT or Trifecta...

 

I think he was referring to the gm stage kits

Op, it doesnt really matter. If it runs well with an afr around 11.8 or less at wot, with no knock retard showing up, then youre in good shape.

Pulley size is the only distinguishable measure of how much power your making on a stage kit without dynoing it or seeing how it runs at the track

 

Ok. Ill throw some pics up on here shortly. The car runs great and not lean at all. Just trying to get an idea of what im working with here.

 

I know you cant exactly see the injectors that well. I havent had a chance to remove the too cover just yet.

 

Holy ****. Youre stage TEN bro! Nice!!!

 

Lol get out of here. I didnt necessarily mean what stage. Just trying to figure out what the previous owner had done. But the original owner is unavailable and his mother had no clue

 

Stock injector harness so probably GM stage kit injectors (42lb), and that doesn't look like a super small pulley. Car has option B, so it has some cooling mods. Seems like a normal "stage 2" type of car, pulley around 2.9" range I would guess.

 

Those were my thoughts too.thank you joe

 

Ok so finally got under this vehicle today. The headers look fairly new ,exhaust is 3 inch after market all the way back, lower mounts replac3d, and there is a heat exchanger installed,the pulley is a 3.0, running zzp 1.0Pcm, not sure of the injectors is there a way to tell...

 

as joe stated above, they are the gm stage 2 injectors

 

GM 42 lb/hr injectors have a metal body and black top... Check to see if you have that.

 

Ok thank you. If i down size pully to a 2.9 should i swap injectors to 60lb

 

GM stage kit injectors are perfectly fine on a 2.9, even a 2.8 you will be ok if tuned properly.

 

Ok. This whole cobalt thing is new to me so thanks for being patient. I was going for the stage 3. I talked to zzp but they could always try to be making a sale. So what do i technically need to pull it off besides pulley? Im pretty much there arent i. Thanks again guys

 

As long as your injectors are sufficient I would think you would need an updated tune for more fuel. If you need different injectors you will definitely need and updated tune.

I would find out what brand of modular pulley hub you have or confirm the bolt pattern. You should be able to just unbolt that pulley and bolt a new one on given the bolt pattern matches up.

 

This.

I myself know the GM 42's support 300+ whp.

 

So can i upgrade the pulley to the 2.9 and if so will i even see a difference? And will i need to change the pcm

 

You will gain about 10hp, not shocking but it's noticeable and it's through almost the entire powerband.

You shouldn't need to change the tune if the MAF calibration is good, but that's up to what the tune is now. Canned tunes aren't always that accurate, the car will compensate within it's abilities but it's always superior to have your car custom tuned.

 

Yea i can understand that. Well ima throw the smaller pulley on and see what the outcome is

 

Ok everyone. I had a random switch installed where the 12v outlet was und3r the stereo....turns out its my ac, which i thought wasn't working so im happy there...question...does this have to do with the tune? The previous owner apparently did most of the work. Im finally getting into the specifics of this car. Car also has after mark heat exchanger and option b cooling. Thanks

 

Might be a GMR Stage 3 car if it had a toggle for A/C, because the GMR Stage 3 PCM turns off A/C, and w/o Trifecta to turn it back on for ya, that would be the only other way to run A/C.

If you remove your PCM, there will be a sticker on the back that should read GM Racing and the year its for.

Example: GM Racing 2006/2007 is on my PCM.

 

ones the zzp 1.0 sticker. But yea the toggle switch is for sure the ac.