Boosting Trouble !

[r34unit]

hi guys

when i hit boost in my r34 gtt the car dies but stays on then it starts to boost again ! its just recently started to have this problem.

the car is on 10 psi with a 3inch tbe and pod filter.

has any had this problem b4 ?

cheers

[GTSBoy]

Google "rich and retard" or R&R. 10 psi can easily be too much. Back it off until it stops doing it. If it has been running 10 psi for ages and only started doing it recently, then consider the possibility of the onset of warm weather to be contributing to coilpack failure.

[Cyifly]

I've got a 34 gtt as well and modded to the days.

But I'm inclined to say it could be a number of things. Boost leak, firing issue..

But 10 pound should be fine ad when my motor was stock was running 14 pound no issues.

Fuel your running on ?

Honestly sounds stupid but try Bp 98 with nulon octane boost with ping resistance and see if there is any difference. Does it feel like fuel cut or boost just hesitates then resumes?

If so I'd say start hunting for boost leak..

If you want to see mods on mine go into rb25 mods and Dyno thread I've posted the most recently

[t_revz]

It's been said hundreds of times that everyone's car hits r+r at different boost levels. Some are lucky enough to get away with 14+

Forget the octane booster as it quite often fouls plugs.

+1 for GTSboy's post plus check if the rubber intake pipe is sucking shut

[Cyifly]

Yup second that actually on the pipe sucking shut.

Forgotten bout all the things stock motors sometimes do. But 10 pound should be fine the 34's come with with the 2 stage solenoid as well ?? Can't remember

But in that being said I've had a shitload of skylines and built Silvia's with rb's they all ran 10 pound and many mates running in excess of 10 psi by stock if I remember right s1 and s2 rb25dets have 2 stage boost solenoid which the high setting is 10 pound so yea

Edited November 27, 2012 by Cyifly

[GTSBoy]

It's not the boost level itself. It is teh amount of air flowing through the AFM that will trigger R&R. And even that is a variable between cars.

If you have a car with the little cooler, and stock exhaust, you will easily be able to run more boost on it before hitting R&R than if you have less restrictive flow paths in and out.

That should be very obvious.

[Cyifly]

Yea that's me saying I've had quite a few of em and no issue so don't know myself that's all