R33 Gtst Boost Problem :(

[Josh33]

hi, having a bit of trouble with my car, only mod is a full 3 inch exhaust, and the recepace all purpose boost setting.

seems to take a long time to rev out.. like once it gets to about 4,500 rpm there is no more power coming and i can hear the turbo sort of 'screaming'...

also at lower rpm, like just starting to boost, the turbo definatly makes a 'rattling' sound like bearing maybe, as well as a more pronounced induction noise, and a general lack of performance. This has been happening for a while before the exhaust went on but now its a bit worse.

ive checked and at least no oil in radiator or smoke out exhaust.

Ive looked for any leaking lines from turbo and cooler but cant see any..

I was guessing i maybe need a fmic to cope with the extra boost as the problems get worse once i have been driving for half hour(ish)

I'll be taking it to mechanics in the next few weeks but any ideas would still be a good help

cheers

[Godzilla32]

Put a boost gauge on it and see what its doing in terms of boost. Besides that its hard to give advice without experiencing it first hand. Was it doing that before you fitted the racepace boost setting you mentioned?? If not revert back to stock and eliminate causes.

PS: you dont need a FMIC it will only reduce intake temps. This is a problem that needs to be rectified before anymore work is done to the car in terms of power gains.

Deren