jdog1990

maybe some one can help me i have a 2006 cobalt ss/sc im only boosting around 8 pounds max is that normal with the mods i have?. what is the stock boost for an 06 cobalt ss/sc. the only mods i have on the car is a header and a magnaflow muffler with out the resonator. how do you know if the bypass valve is not working or the bypass solenoid is not working? the butterfly valve on the bypass valve is not stuck and moving freely and there is all new vacuum lines on the bypass valve and solenoid any other ideas would be awesome. thank you.

blueLNFftw

iTrader: (16)

are there codes?
what size pulley?

jdog1990

there are no codes and the pulley is stock

jdog1990

no codes and its a stock pulley what is an ss/sc so post to boost ?

blueLNFftw

iTrader: (16)

10-12 psi


does it bog? sound choked out?

andrewcarr1993

iTrader: (5)

Seems like that would be about normal with a header.

blueLNFftw

iTrader: (16)

I lost 1 psi with a 1.75" long tube and catless set up with a straight through exhaust....

jdog1990

it don't bog nor sound choked out it sounds good the rpms don't dip down. BUT when it gets up to 4000 rpm in second gear it seems like it has no power and rpms climbs really slow. when i had my injen intake on it would only boost 10psi and yesterday i put my stock air box on cause it kept throwing maf sensor code when it was wet out and when i put the stock one on it only boosted 8psi

blueLNFftw

iTrader: (16)

you change the intake when it rains?

did you disconnect the battery and let the ECU reset?

jdog1990

should the rpms climb really slow after 4000 rpm then with my set up and seems like theres no power on the top end of 2nd gear

jdog1990

no i just got tired of it throwing codes when it rains so i changed it back to stock lol and no i didn't disconnect the battery im going to do that now

andrewcarr1993

iTrader: (5)

I was just saying that with a header it's normal to lose a PSI or two but I guess not as much as you are.

jdog1990

yeah that's why i came on here because i don't think i should be losing that much

Shanedude

My m62 sunfire boosted 8-10 lbs depending on season. I also had a 4-1 header with full 2.5 magnaflow exhaust. Also I notices powerloss up near 4500-6250. Just the way of the supercharger I always thought. Plus I was on super rich GM tune.

jdog1990

i guess the only problem i have is that when im in second gear it goes to 4000 rpms and after that i climbs really slow

Shanedude

It will loose some steam up top of course but if your gut is saying "this does not feel right" than something may very well not be right...

You have any way of going to a cobalt meet nearby and finding someone with a similar car to drive along in?

ECaulk

iTrader: (6)

Is it doggy when going WOT first to second and into third? Could be your heat excahnger pump crapped out and your IATs are high so timing is being pulled

jdog1990

its not doggy first into second into third its just doggy up in the upper rpms

ECaulk

iTrader: (6)

Check the IC pump and make sure its working

jdog1990

i just drove it after taking the battery off for a little bit when i am full throttle in second gear it boost 8psi then droops to 5psi what do you think that is ?

andrewcarr1993

iTrader: (5)

Could there be cracked lines so it's releasing boost when it shouldn't be?

ECaulk

iTrader: (6)

Could be a lot of different things, I'm not extremely familiar with the lsj just know the ic pump failure will make them feel doggy

jdog1990

the vacuum lines are new do you think it could be the bypass valve or solenoid ?

jdog1990

it almost sounds like its not getting enough air into the engine

ECaulk

iTrader: (6)

Vacuum lines connected correctly? Air filter not covered in an excess of crap?