boosting problems
 

hey guys... i've been boosting for about a week and a half and now some problems have occured. car was boosting fine 2 days ago, and now it's making a wierd whirrring noise when the turbo starts to spool. the car only boosts 2 psi now for some reason. i checked for leaks and found nothing. i found a bolt that mounts the turbo to my manifold got loose somehow... but i fixed that last night. i thought i had solved the problem, but it's still there. someone please help. i don't think it would be the turbo since i bought it brand new.

Re:boosting problems
 

Your turbo might just be surging. Mine sometimes does it in first due to the lack of flowage<-------my own term. Check out the post at the top of the forced induction forum about reading compressor maps and it explains it briefly somewhere in there. Look around for something that has to do with your surge limit.

Re:boosting problems
 

if i am surging... is there any way to keep the turbo away from the surge area... i don't want to damage my turbo... i was reading the "how to read a compressor map" and i do hear that snake like hiss... i've had that noise ever since i had the turbo installed... unless that's just the sound of the turbo spooling... but after reading that forum i think it's compressor surge. you say it only happens in first gear, but i only hit 2 psi in every gear. i don't know what the hell is happening ??? :'(

Re:boosting problems
 

is that hiss the exhaust excaping throught the wastegate...?

Re:boosting problems
 

dont think there is any way to fix the compressor surge ... I know they make systems that are designed to spool your turbo faster but those are way out of my range of understanding. As far as boosting 2 psi, you have a leak somewhere. Check all connectors and your intercooler(If you have one). Hell use the old soap and water trick. Usually when connectors are new they tend to loosen up a few times bofore they get really heated. Good luck

Re:boosting problems
 

i had the EXACT SAME problem only i hit 5 psi instead of 2...anyways, make sure that your wastegate arm isn't hitting anything...mine was and ever since i bent the arm to clear what it was hitting I have been happily boosting.

Re:boosting problems
 

I am not boosting yet ,and I'm new to turbos but i've researched enough guess that your turbo is surging due to a lack of propper wastegate flow.If this is your problem you might have to get an external wastegate.That would deffenitly fix your problem.

Re:boosting problems
 

here's my setup guys... looked for problem and it's still occuring...i hear a hissing noise (guessing that's the sound of the turbo spooling), then there's another noise that occurs when hitting 1-2 psi... sounds like a deep sounding whhhhhiiiiirrrrr...this is ------- GaAaAY!!! >:( i got addicted to boost and i want it back dammit!!! :'(

2000 civic si:
*t3/t04e .60/.63 A/R
*deltagate mark 2 wastegate
*revhard manifold
*tyrus FMIC
*turbo xs type h BOV
*smc plus
*dsm 450cc injectors
*2.5 inch charge piping (t-bolt clamps keeping everything together)
*running an open 2.5 inch downpipe :P

Re:boosting problems
 

Are you hearing a slide whistle noise?
Noticing any oil leaks or smoking? Vile smells under the hood after running for a while?>

Re:boosting problems
 

is that an external waste gate? check the hoses on it?

also check all charge pipes for leaks.