R34Gtt Boost Seems To Be High?

[nickh09]

Hi All,

I have just bought an r34 gtt, last night i was driving it and looked at the standard boost guage looking for the car to switch between the 5 to 7psi at 4500rpm and the boost didn't change at all when i went past that rpm, it held all the way to redline. Then when i did it again i notice that the needle was very close the the 1 kg/cm2 line... if i was to guess i would say it would hold 0.8 all the way to redline. The only mods this car has is a full turbo back exhaust. My question is does this boost seem high for the mods? I have had a look and the standard boost controler seems to be in tact as in it doesn't seem to be earthed to get the extra boost before 4500rpm. Some other strange things i have noticed is that my fuel pump is quite loud compared to my friends r33 so im wondering if this car is still stock asides from the exhaust. I have attached some photos of the actuator and turbo. Should this car be running this much boost? If the car is indeed running between 0.8-0.9 kg/cm2 wouldn't the computer have gone to r & r by running that kind of boost? Your help is greatly appreciated

[Randon_I_Am]

That seems about right.

With the turbo back exhaust it'll boost slightly higher, and the factory guage is far from accurate...

It might have the grounded solenoid trick done so it gets full boost through the whole rev range. http://www.skylinesaustralia.com/forums/topic/42895-howto-rb25det-high-boost-mode-with-standard-solenoid/page__hl__rb25det+high+boost+mode+with+standard+solenoid

If you're really concerned get an after market guage and hopok it up.

[lilcrash]

I think the dual stage is only on the autos but I could be wrong, my neo motor always ran that much boost. Feel

Free to correct me. Just what I've read.

[Randon_I_Am]

Nope. All GTT's come out with the dual stage.

[nickh09]

What boost should it be going to with just a full exhaust?

[KiwiRS4T]

The proper measure is bar so you are at 0.9 bar (or 13psi) which is a bit higher than stock if your gauge is accurate. If you are not having any problems I wouldn't worry about it.