t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

ok, im going to ask this question for the 100th time because its driving me crazy, i have a B16A2(99 civic Si) and i have a saab T3 and intercooler, and Vortech 12:1 Fmu and check valve, ok.. i have the boost at about 7PSI and it runs at that all the way up to about 6000 RPM, and then the boost lowers and lowers and by the time i get to red line(8000 RPM) the boost has fell to about 2-3 PSI, people have told me that its probobly my intercooler, so i took it off and its still doing the same thing, now i was maybe thinking that its the charge pipes because they are really small in diameter, they are probably 1 1/2 inches inside, someone also said it may be my exhaust because its stock except for a straight through muffler, do anyone have an idea what it could be, any one with the same car and the same problem mayber??? please help!!!!!!!!!!!!!!!!!

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

Is the turbo reaching such high rpm that its stopped producing as much boost?

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

That would be my guess too. Maybe the turbo just isn't big enough to produce the kind of boost you want at that rpm. What size turbo is it, and what engine do you have?

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

so i need a bigger turbo ??? i would agree with you but hears a questin for you, if my friends t25 which is smaller than my t3 boost his eclipse gst 16PSi all the way up to 7000 Rpm then why cant my t3 boost my car 7PSI to 8000, my turbo is at 4PSI at 7000 RPM, so i dont think the turbo is the problem????????????????

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

But you are forgetting the one thing. The c/r on the stock gst/gsx is around 8.5:1 and yours is 10.2:1

You are also making more power with 7-8 psi than he is with 1 bar. Just because his engine is larger than yours doesn't mean jack. My del sol smokes my buddy's gsx, I'm running a 14b at stock wastegate 8psi and he has a t25 at 1 bar with a butterfly valve.

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

this not suppose to happen, i myself installed a a/r 60 T3 on a B16A, and it ran 8 psi up to about 6000-6300, as he revs higher you can feel the turbo has reach it's full efficiency at about 6300, but the boost DOES NOT DROP...

take you car to a turbo specialist, somthing is not hooked up right.

i would think it is your wastegate, it is opening to wide on the topend, and it is killing your boost on the topend.

later

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

I agree wiyh CHINGRO.The turbo should hold it's max set boost even if it reaches it's max R.P.M.You would only loose boost if your wastegate is leaking at high boost or maybe your B.O.V is leaking if you have one.

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

yeah i was thinking that what happens is my wastegate stays open at higher RPM, because when i change my gears lets just say from 2nd to 3rd the boost goes all the way up to 7PSI and then it immediatly starts going down as soon as its there, it does sound like a wastegate problem but how do i fix it, thats the question, its just frustrating because its like my car is stock when im racing it becuase by the time i switch gears im already past 6300 RPM and im just runing 1 PSI, help me!!!!!!!!!!!!!!!!!!!!!

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

hmmm....

u say when u change gears the boost goes up then starts to go down...

where exactly did you attach the vacume line on the waste gate to?

and, where did you run the BOV vacume line to?

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

the wasgate vacuum source is the one right on the turbo and my BOV is on the intake manifold source along with my FMU and Boost gauge

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

get it checked out....i cant really tell what is wrong over the net.

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

blastphemy!!!!!!!!!!!! hasent anyone had a similair problem as me out there!!!!!!!!!!!!! there has to be someone...SOMEONE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

I had the similar problem as well. I was using a greddy boost controller and i was using the vaccum source off the turbo. My boost kept fluctiatiing. I then used a diferent vacum sorce and i just closed off the vacuum source on the turbo , and now my 7psi sticks up to redline...

Hope that made sense/helps

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

so it was your vacuum source? what did you use to seal off the one on the turbo?

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

weld it or put some jb weld on that biatch

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

ok, i just changed the vacuum source on this mofo, we shall see if it makes a difference.

Re:t3 on 99 civic si HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

ok, cloged up the vaccum source on the turbo its self since i wont be using it and i changd the wastegate for a vaccum source on my intake manifold which is the same one i am using for my boost gauge, i went for a test drive and it feels alot faster by now when i go up to about 5000 RPM my car makes this really loud sound, it sounds like theres an air leak but my boost itsent going down at all, i hope its not pinging but it does sound like it is, damn i hate using my car for a guinea pig. it sounds like my BOV is slightly open and its letting out air but i didnt even touch the thing???????