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Old 04-17-2009, 04:12 PM   #1
azerty
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Default Cannot build up boost :(

Hi.
I have this strange problem, I cannot raise boost past 0,9-1 bar.
It just doesn't build up.
It is not hitting fuel cut.
I do have a manual boost controller, from Forge, to help me increase boost.
I tried also to fully close the vacuum line to the weastgate, but boost still doesn't build up.
Any ideeas?
Thanks .
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1988 yelow manual turbo targa
HKS ssqv bov
Hose Techniques silicon hoses
Forge manual boost controller
boost gauge
K&N FIPK
ACT clutch kit HD-G6
Fidanza lightened flyweel
550cc RC Injectors
255lph Walbro Fuel Pump
LIPP Lexus AFM Replica
3" turbo back echaust with divorced
downpipe and no cats.
Aeromotive FPR
Aem Uego Wideband Gauge+O2 sensor
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Old 04-18-2009, 08:01 AM   #2
azerty
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Default

Hmm...
Let me rephrase that.
How much boost can u make with the stock turbo?
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1988 yelow manual turbo targa
HKS ssqv bov
Hose Techniques silicon hoses
Forge manual boost controller
boost gauge
K&N FIPK
ACT clutch kit HD-G6
Fidanza lightened flyweel
550cc RC Injectors
255lph Walbro Fuel Pump
LIPP Lexus AFM Replica
3" turbo back echaust with divorced
downpipe and no cats.
Aeromotive FPR
Aem Uego Wideband Gauge+O2 sensor
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Old 04-21-2009, 08:45 PM   #3
Mahonri
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Default

Sounds like it could be a number of things going wrong. First I would look into your boost controller, make sure its setup right with the ECU.

To answer your other question, I would go as far as 15 lbs PSI max on the stock CT26 turbo. Anything more then that and you get into problems.
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Old 04-21-2009, 09:35 PM   #4
Kevin
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i read that 10-11 psi is safe if you are all stock with aftermarket downpipe and exhaust etc
Yea like mahonri said. look into your boost controller first.. and then get back to us.
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Old 04-22-2009, 04:56 AM   #5
azerty
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Unhappy

I have tryed before to play with this boost controller, and I got till 17-18 PSI before hitting fuel cut.
Now, I have the Lexus AFM upgrade and upgraded injectors, and I tryed to raise boost again.
I tryed with the boost controller fully closed, and it raised no more then 13 PSI, with it fully opened I achived even lower boost.
I have to mention that when raising to 18 PSI,I didn`t hit the fuel cut, it just don`t raise higher.
And I understand that the stock CT26 is able of far more boost than that, am I wrong?
I will try to change some more hoses, just in case, but I sure would like to know if indeed the stock CT26 can make more boost, and how much?
If I disconect the vacuum hose that goes from the turbo, trough the boost controller to the wastegate, I get the same result of 13 PSI.
Don`t you think that it should have raised and raised....?
__________________
1988 yelow manual turbo targa
HKS ssqv bov
Hose Techniques silicon hoses
Forge manual boost controller
boost gauge
K&N FIPK
ACT clutch kit HD-G6
Fidanza lightened flyweel
550cc RC Injectors
255lph Walbro Fuel Pump
LIPP Lexus AFM Replica
3" turbo back echaust with divorced
downpipe and no cats.
Aeromotive FPR
Aem Uego Wideband Gauge+O2 sensor
azerty is offline   Reply With Quote
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