how much boost does a stock 07 ss/sc have? is it 15? or 10?

 

12..

 

o cuz i bought mine from the dealer and its at 15

 

should be stage 2 then

 

Mine would peg 12.5psi stock .... with Stage 2 it would hit 15.5psi, and with my Stage 3 pulley it hits 16-16.25psi

 

so if my cobalt ss hits 15 psi its a stage 2 pulley?

 

most likely, but it could also be a clogged cat if its not stage 2. Check your supercharger pulley. if it has 4 blue bolts its the GM stage 2 pulley.

 

o alright thx, how would i know if its a stock pulley?

thx i jus checked it and it has the four blue bolts so its a stage 2

 

Awesome... That means you also have the upgraded injectors (42.5 pound)

 

really? how wud i check if i have upgraded injectors?

 

well stage 2 install was a kit, so it came with everything. If you didnt have those injectors it wouldnt run well. I would think they would need to be removed to see what injectors they were....

 

oh i see...is that why i dont get much good gas mileage? cuz the injectors r bigger?

 

You would have to remove them. They should be blue.

If your not experiencing any problems (sputter, very poor performance) than you probably dont need to check...

 

what MPG u getting?....

 

yea the performance is great, i thought it was stock but now i found out its stage two so im like lol

im getting around 19 to 22mpg

 

you can get better I got 30.1 MPG on my stage 2 from a kinda long trip. look in your engine bay there are prob other things you have that you don't know about

 

lol dam thing is i dont know much much bout cars like that i mean i get around, hmm idk i havent takin a long trip yet

 

upload a pic of your engine bay and we might be able to spot some things if you want.

 

Well if you have Stage 2, the 42 lb/hr injectors should be installed already, but a visual inspection isnt hard. The injectors sit right under the plastic fuel rail cover that has the Ecotec Supercharged emblem on it. The stock 34 lb/hr injectors have a green plastic connector for the injector harness, and the 42 lb/hr injectors have a black plastic connector for the injector harness. If you see black tops they are the 42's

 

alright ill take some pics of it later and put em up cuz i dont have the car with me right now bux thx for the help

thx that helped lol the connectors black

 

very good !! enjoy your stage 2 car

 

If your reading the mpg on the display thats never right unless your always resetting it mine usually says 26-28mpg but i i reset it then go on a trip i get like 33mpg

 

How do i reset it?

 

i believe you hold down the 2 little buttons thats on the right side of the steering wheel. hold them for like 2 seconds while on the MPG display. if im wrong im sorry, i havent driven my car in like 5 months

 

wich ones tho? cuz theres four buttons