Boost Reduction In R34gtt

[buddylk]

Hey guys,

Recently i noticed that the boost has dropped from 0.65 to 0.4 bar. the strange thing is that the boost holds on at 0.4 bar very well (no spiking or going bellow 0.4). My car is fully stock standard. Vacuum hoses were changed to silicon and double checked for leaks. What do you think the cause is :

faulty boost solonied ?

cheers

Buddy

[chook]

sounds like your solenoid is doing nothing, either electrical or mechanical inside solenoid, try someone elses R34/S2 Stagea solenoid, check the wires, or go aftermarket. Also double check that the hoses went back on the same way, easy to mix up the 2 connections on the solenoid.

Edited June 8, 2007 by chook

[fEkuaR]

by pass the solenoid with a basic bleed valve and keep the valve completely shut. It will then run the full boost off the actuator which is 7psi instead of 4 psi then 7. That wont cause any issues on a standard ecu and will give you a bit better down low power. But make sure the solenoid is bypassed completely or the boost will spike.

[gtt]

I just got the same problem as buddylk. I put blitz daul sbc spec S( brand new) on about 2 weeks ago, and it was working fine. yesterday morning the car can do 0.73 bar, change gear 0.73 bar, drive good, then trafic light 0.40....0.43 bar from 4000-7000 rev. i checked there wasn't any leaking i could see. i try to blow some air to the actautor( use my mouth) then the car get to 0.51 bar( not as easy as before, slow down at 0.39 bar then jump to 0.51 bar).

i just wonder is there something wrong with my turbo(stock r34 gtt) or something wrong with the actuator or something else...

and will this thing damange the car?( no blue smoke)

could someone help, please.

cheers

jay