im having some trouble with my boost im only getting about 5 psi at full rev..... ive done apressure test and ive replaced all hoses associated with the supercharger ive also replaced the boost control module i was told it might be the butterfly inside the sc so i took some seafoam cleaner and did the best i could to clean it and im still at 5psi i have a gage in the car tht reads the pressure and it reads the ....(brain fart) the word for when the pressure goes below zero lol... it reads at about 19 when its below zero and only gets up to 5 above zero..... does 19 below zero sonund right and if so if you have any suggestions as to why im only boosting at 5

 

use penetrating oil in the little butterfly that under the superchaerger

 

can you please post a pic as to what your taslking about or a walk through i bought sea foam for this very purpose now i just gotta find this butterfly youspeak of

 

It is up inside the supercharger, but it lines up with the top of the endplate on the intake mani. It's the first thing you will see if you turn the supercharger upside down. Ohh and the word you were searching for is vacuum lol

 

what should i be reading for vacuum i have stage 2 injectors and a 2.9 pully and belt along with a cold air intake and a hass fuel pump in your personal opinion what should my boost be a and what should my vacuum be at

 

Vacuum seems ok. Mine is about 20 at idle, 10-15 on a highway cruise, and 27 or so when coasting/decel. As for boost, it really varies from vehicle to vehicle because of pulley size, intake, and exhaust. You should definitely be at like 14 or 15 I would think though. You should definitely try cleaning that valve first and if that doesn't work, just replace the boost bypass valve, unless that's what you meant by boost control module

 

yeah i replaced the bypass valve with one from zzp.... and i cleaned the **** out of that valve

 

and thats sounds about right for my vac ..... im taking it to the dealership today ill let ya know what they hav to say

 

Does the car feel slow as **** too? Or does it feel like it pulls the same? Is your belt slipping? do you have the shorter belt with your set up? are you just reving it? More info would be nice, maybe a video if possible.

 

i mean to be honest when i bough the car i had the stage 2 kit i talked to the previous owner and he knows alot about cbalts he builds lsj motors so i would hope that he would of gotten a smaller belt..... its not slow as **** it feels as if its still pulling so its not in limp mode ive had that happen before cause my throttle body... ive ran ull throttle on the road and reved it both the you can hear the supercharger whinning pretty stron it just seems like once it gets to a certain psi it stops almost like once it hits that amount of pressureit starts leaking i ran a leak test on it and didnt find any leaks my throttle body was fucked up from something before i replaced it what i was thinking is whatever fucked the throttle body up might have fucked the butterfly in the s/c as well imnot exactly surehow the s/c actuall works thats just my best guess..... ive thought about the belt slipping imma contact the previous owner and ask him if he replaced it when he put the stage 2 on

 

you sure your boost gauge isnt messed up then sense the car is still pulling?

 

......wait. Are you trying to say you only get 5psi when you rev? im so confused now after reading the longest sentence in the world, lol.

 

lol i get 5 when im on the road and 3 when i rev.......................................

 

if it is the gauge i wouldnt know i mean the vacuum reads proper so m just not sure and im sure the dealership is hving the sam trouble

 

its my supercharger