Well, whether it read accurate or not, it says around 15-17psi...with K&N intake, catless custom exhaust and stage 2 pulley. A guy I met down in Orlando had just an intake & stage 2 (i think), and had about 14psi...so...all of them must be wrong then.

 

Intake doesn't increase boost.

Exhaust decreases boost (well mainly header/dp).

So while 14psi is reasonable with stage 2, I'd say 15-17 with just the stage 2 pulley means a bunk boost gauge.

You can lose 1-2 psi with a better flowing header/dp...especially the vibrant one. Not that it matters, boost doesn't equal power.

 

Well, then lets find out how many people's are wrong. Go run your car see what boost you push.

 

Exactly , i'd love for my car to have a 2.5'' pulley only making 10psi . That would just mean i have a more efficient air pump

 

Well, I will have to say my car was always sick...don't know if anyone else has had this happen when they had their cobalt stock, but i have blown the oil dipstick off twice when I was still stock.

 

Usually 14 pounds with a 2.9 and head/dp.

 

There are too many variables to get a poll of PSI numbers from different members. Air temp , humidity and elevation above sea level will play havoc with the numbers.

 

bad intake manifold gasket...you must have an 07...

my buddy works as a tech at Bill Heard Chevy; ive heard about it a hundred times.

 

The dip stick was just loose...is all that is. It isn't doing it anymore. But since that has happen, I have oil grease all over the engine bay, what is the best product to get that S**t up?

 

Very important!! When any of you guys' cobalt's are at idle, and you open your hood, does the car make a fluttering sound? Supercharged Cobalts only please. Right now my car is making fluttering noises when idle, and I don't think it did it before, so I need to know.