Waste gate probs?, ct26 Options

[urbandork]

On the ct26 there are two vac pipes for the waste gate. the one that points to the turbo goes to the turbo and the on that points away gets capped off when on a 5sfte.

When i cap mine off i cant boost any higher then .30 HG/mm. however when i take it off i am allowed to boost up to .7 cm^2 (10 psi after converstion done) although i only bring it till around 8 psi tops.

Whats up with my set up?

Ive checked for boost leaks and found none.

[lagos]

not sure what 30 HG/mm is in psi ....

the reason you cap that 2nd one off is because on the 3s, it goes to something called the tvsv (or is is tvis?). this is kind of like a factory way to let the car go into low or high boost mode, depending on the what the ecu decides is safe. the 5sfe dosnt have anything like that, so you just cap it.

do you have a boost controller? you are probably getting low boost because you are just running off the wastegate thats setup at like 6-8psi depending on your exhaust. if you get an boost controller in there, youll be able to get more boost.

This post has been edited by lagos: Sep 22, 2005 - 12:35 AM

[yungazzdriver]

how much boost does the ct-26 bring stock?

[presure2]

how much boost does the ct-26 bring stock?
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the ct-26 actuator spring is set to open the wastegate @ 7psi.
what kinda boost controller you using urban?

[urbandork]

no boost controler, i figured the stock waste gate would do fine considering the amount of boost creep Manny saw in his set up.

stock waste gate level is 7 psi which is roughly .49 kg/cm^2

With that tvs nipple blocked off i only boost at .30 kg/cm^2 which is around 4.26 psi.

And just a thought i may switch over to bar/kPa

So now im thinking cap the tvs nipple off and put a boost controler and my problems will be solved.

As of now by the time i hit 10 psi i have to shift to the next gear. When i reach 5th gear by the time the pressure gets near 10 im already going to fast lol. So thus far I really havnt had a problem.

This post has been edited by urbandork: Sep 22, 2005 - 10:48 AM

[lagos]

you may have a restriced exhaust or downpipe that would cause you to get less boost.

or you have a leak from your exhaust manifold

[urbandork]

you may have a restriced exhaust or downpipe that would cause you to get less boost.

or you have a leak from your exhaust manifold
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stock DP and the exhaust is a 2.5" crush bend and it terminateds right under the drivers seat area with a magnaflow race series muffler

Ill check for evidence of a leak from the manifold.

[presure2]

is the cat in the DP gutted?
if not, u may wanna try that, it could be clogged

[urbandork]

lol arg haha. no cats not gutted. perhaps ill just try the boost controler first lol.

[RUNNIN-LOW]

well with my set up i didnt block off the second tube coming out of the waste gate i left it open..im doing fine with ten psi stock.i reach full boost which is ten psi at around 3800 rpm...i covered the second tube yesterday and i was doing about 6 to 7 psi only which wasn't enough for me so i reopened it. so im not sure why yours aint reaching full boost at around 4 to 5000rpm..