I have an R32 GTR with R34 N1's, PFC, Blitz Dual SBC and lots of other stuff. It recently got tuned by Jim at CRD and made 285 AWKW @ 20psi. (Jim said his gauge was only showing 17 but it showed 20psi on my gauge on the street.)
After a trip home from Sydney I noticed that by my gauge I was only running 15psi and not 20 any more. I had not touched the boost controler or anything else. The PFC handset use to show about 1.35 to 1.4 bar when the gauge showed 20psi. Now at 15psi on the gauge it still shows about 1.28 bar on the handset. I tried to turn the boost up at the controller to see what sort of control I had but it required a big increase at the controller to get a small increase on the gauge. It didnt really want to go over 17-18 on the gauge.
So, at first i thought it may have been a leaking cooler pipe so i checked all them and they are fine now. I then removed the 'out' hose from the boost control solenoid in order to basically stop the controler from controlling the wastegates. This resulted in the turbos spinning freely to 20psi on the gauge where I back off. So from this i take it I can rule out a leak or a stuffed turbo ?? The strange thing was that the PFC hand controler showed 1.6 bar peak hold at 20psi on the gauge, when it use to only show about 1.4.
So I have a few problems here I think.
How did I loose 5psi on the gauge??
Does it mean my boost controller is playing up because when it is conected to the gates it wont allow over 15psi ??
Why is the PFC showing me strange and inconsistant figures ??
Any help with this would be great.
Thanks.
Tim.