Stock Boost
#1
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Join Date: 01-20-17
Location: St. Louis
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Stock Boost
I was out running around with my cobalt trying to figure out my Max boost, which turns out to be 11.2 psi. I've been reading stock M62s should be making 12 psi stock. The only thing done to my car is a Magna flow exhaust system. My question is do any of you think I have a problem? Or maybe know where I'm losing that pound of boost? Or could it just be that my cobalt was the runt of the litter?
Thank-you!
Thank-you!
#2
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I was out running around with my cobalt trying to figure out my Max boost, which turns out to be 11.2 psi. I've been reading stock M62s should be making 12 psi stock. The only thing done to my car is a Magna flow exhaust system. My question is do any of you think I have a problem? Or maybe know where I'm losing that pound of boost? Or could it just be that my cobalt was the runt of the litter?
Thank-you!
Thank-you!
#3
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Oh alright that makes sense, sorry I'm new at this lol. I didn't read it on my boost gauge though I have a complete computer diagnostic system that gives me an exact reading lol.
#4
Senior Member
Many reasons why boost won't be exactly at 12psi. Like jdbaugh1 said, you can have less boost if you have better airflow through the engine from the exhaust. Boost can also be higher and lower because of temperature, humidity, and barometric pressure. Higher altitudes will have lower boost numbers then lower altitudes. The more dry the air the lower the boost numbers will be.
#6
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Stock catback does not hurt flow. (So far proven to near 300whp)
Another good read is when Infraredline unbolted his cat-back to see a negligible 1whp gain.
https://www.cobaltss.net/forums/dyno...esults-319528/