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 .

Hmm...
Let me rephrase that.
How much boost can u make with the stock turbo?

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.

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.

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....?