Too Much Boost?

[dayao]

Hey fellas,

Just installed a FMIC on my r33 gtst series 2 and it was my first time i tried it, now my question is that when i floor it my

boost reads +7 mmHg which is i think about 14psi then starts jerking around. isnt that a bit too high for a stock turbo?

Any ideas wat i did wrong? Any help would be much appreciated. cheers.

[99 GTT]

14psi is to much for a stock turbo.. it may last a week or it may last 2 years but it is a risk..

I would recommend a Electronic boost controller and at least a DYNO tune, but i would do both... By fitting a FMIC you are changing the way the engine breathes..''

Good luck...

[dayao]

I noticed that with the stock piping i had to remove a hose that was connected right before the intake manifold i think. i traced that hose back to the turbo. now on the new piping there is no nipple to connect that hose to so i just left it out. could that be the problem?

[grippy]

Sounds like you have no boost sense line for the turbo actuator. This will cause your turbo to produce max boost all the time due to no muscle air to open your internal wastegate. There should be a vacuum line from the inlet manifold or turbo outlet casing to your actuator on the turbo.

This is essential to have so your boost can be controlled.

Have someone check it out if you don't understand it or your turbo won't last very long.

Good luck..

[dayao]

Thanks guys for all your help, will get it checked out ASAP. now will the car be fine if i just drive it moderately and not too hard til i get it checked out?

[TaKz]

not too sure if it's ok to drive on the set up you've got atm

but if u can u should be able to control boost with ur right foot

Edited December 14, 2009 by TaKz

[blind_elk]

The car will be fine to drive, as long as you are sensible.

Just because it has a turbo doesn't mean that you have to boost it all the time.

[lachlanw]

it is free boosting . yes its ok to drive but dont boost it at all . keep it below the 0 on the stock gauge . and get a proper boost gauge before you post on here again

get a nipple welded/drilled&taped/nead it in where the factory one was . or run it off the nipple that comes out the bottom of the throttle body as thats just unimportant ( in relation to boost control) carbon canister

Edited December 16, 2009 by lachlanw