Profac B-spec Ii..r34

[SKY 34]

hey,

got a problem here, has anyone use trust profac B-spec II on R34 GTT before?

I got one unit to be fitted with Apexi pfc ECU...the boost would not hold..I've seen the dyno result..whenever boost hits 0.9bar, it just dive down, the device I thought was faulty...The tuner is X-speed in W.A...they have spend the whole day trying to tune the damn thing...and even told me that they had another experienced mechanics in to take a look at the connection and such.....but still couldn't figure what is wrong with it.....

so I sent back to gR33ddy whom i got the boost controler from to be tested by trust

I got news from gR33ddy that the boost controler is not faulty???

huh??? so tuner said it's faulty and seller say it's not....wtf is this....

back to topic..is this just because profac cannot be fitted on GTTs? or am I getting screwed by one of the party involved...

[thommo]

list your other mods

[SKY 34]

umm

nothing much...

Apexi pfc

factory optional 2.5" xhaust

HKS SQV BOV

Blitz Intercooler

HKS pod

CAI Box

only these ones will have any effect on peformance I guess...

[sewid]

Well there is not doubt that boost controller is completely fine for your car. The poor performance you are experiencing are thus either due to a fault with your device, a faulty installation or a problem with the tuner.

I am using the same controller on my GTR and despite some initial waverings as to whether it was up to the job it seems to be performing adequetly now I have worked out it's little quirks.

If you go grab the settings and type them out it might give us an indication to where the problem is. There should be these settings:

- boost (% figure)

- set boost (value in bar)

- gain (% figure)

There are also limiter figures which con red when you're scrolling thru the modes. Be sure your limiter is not set below your set boost or you could see something like you describe............. thats an obvious one though your tuner would definately not stuffed that up.