boost issue

[PistoNHeaD]

ok, this is the scoop, i have a 2.8 pully, the gmpp stage 2 belt, 60# injectors. for some reason im only getting 13psi of boost, does any one know what is the prolblem?

[Tennpenn83]

opening up that exhaust with the header/dp and cat-back will drop a couple lbs of boost. making better more efficient use of the boost is what you're doing.

also it is getting hot out. i was having a problem this past week where the ecu was pulling timing and bleeding boost cause the iat2's were so high

[CuriousGeorge]

boost doesn't ness make more power. its all about the wonderful world of CFM

[Italianjoe1]

Yeah, but 13psi is too low. Have you verified that the boost gauge is correct? Check your boost pressure with a different gauge first. Then start looking for leaks or something, or make sure that the belt is not slipping on the S/C pulley.

[CuriousGeorge]

since i know you have HPT, what is the max kPa your seeing on wot runs?

[Italianjoe1]

Originally Posted by CuriousGeorge

since i know you have HPT, what is the max kPa your seeing on wot runs?

With what size pulley? I have porting work done on both my manifolds and full cooling as well, so I register a little less than average.

[tubbs]

Originally Posted by PistoNHeaD

ok, this is the scoop, i have a 2.8 pully, the gmpp stage 2 belt, 60# injectors. for some reason im only getting 13psi of boost, does any one know what is the prolblem?

i have a 2.8 also and im only reading about 14lbs. but when i was stock i was only reading 10 so, i think my gauge is just off.

[CuriousGeorge]

i have stock manifold/head etc and i read damn near 18psi at 7**' above sea level.

[burnrubr88]

Originally Posted by tubbs

i have a 2.8 also and im only reading about 14lbs. but when i was stock i was only reading 10 so, i think my gauge is just off.

you should not see 10 stock.