ive noticed that im not seeing full boost in my car...and this bothers me. I have an external wastegate setup(turbonetics Evolution) and the spring is set for 7psi...and im only seeing 5. i checked the system for a leak and i didnt find any. can i really lose 2 psi across a FMIC and the piping? i mean id think 1 psi sure, but 2? what else can be going on here? thanks for any input guys.
#101541, "RE: low boost condition" In response to Reply # 0
Originally posted by DSMTalon Can i really lose 2 psi across a FMIC and the piping? i mean id think 1 psi sure, but 2?
Sure. That's fairly typical.
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#101543, "RE: low boost condition" In response to Reply # 1
if you want the full 7psi, you can run your wastegate vacumm line directly to the intake manifold. I run mine like this... but it'll be harder to detect when u have a boost leak.
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#102966, "RE: low boost condition" In response to Reply # 2
Sooo if I am getting this right... RIght now I have the Boost " signal" hose running straight from the nipple on the compressor to the Tial wastegate. What I SHOULD be doing if I want my 7psi spring to actually make 7psi of Boost is to run a Hose from the intake manifold Nipple down to the Wastegate and just cap off the Turbocharger NIPPLE?
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#101544, "RE: low boost condition" In response to Reply # 0
Originally posted by DSMTalon ive noticed that im not seeing full boost in my car...and this bothers me. I have an external wastegate setup(turbonetics Evolution) and the spring is set for 7psi...and im only seeing 5. i checked the system for a leak and i didnt find any. can i really lose 2 psi across a FMIC and the piping? i mean id think 1 psi sure, but 2? what else can be going on here? thanks for any input guys.
I had the same problem, even after running the vac line from the intake manifold. It could be your spring. I was told mine was 8 psi but im pretty sure it was 5. So I put a MBC in line and the car runs great. Smoother and more power, and the wastegate pops open at 8 psi with no creep.
#101545, "RE: low boost condition" In response to Reply # 3
Yeah i guess i could just run the line to the manifold. Wow. a 2 psi loss across the intake piping? is there anything i can do to get those numbers down? i mean i would expect a pressure loss across the intercooler. Hmm. maybe ill just try shimming up that spring to see if i can get 7 psi at the manifold, since the WG came with a few shims.
#101547, "RE: low boost condition" In response to Reply # 4
Originally posted by DSMTalon Yeah i guess i could just run the line to the manifold. Wow. a 2 psi loss across the intake piping? is there anything i can do to get those numbers down? i mean i would expect a pressure loss across the intercooler. Hmm. maybe ill just try shimming up that spring to see if i can get 7 psi at the manifold, since the WG came with a few shims.
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