Just got my car re-tuned and dynoed and thought some people might be interested in the results, particularly the tuning of the unichip. Its a bit unfortunate that I don't have a pre-unichip dyno but I didn't own the car when it was fitted.
R34 GT-T tiptronic
Current mods are:
3.5" unknown japanese brand exhaust
3.5" unknown japanese brand dump pipe
Greddy Profec B boost controller
Blitz LM intercooler
Apexi Super Intake
Oil cooler
Unichip
The reason I got it re-tuned was because I felt the car was running too much boost and that it was running rich. The first run confirmed this with a very jumpy power curve although the AFR was ok at a very consistent 11.4. Peak power was 196rwkw. This was at 13psi.
Boost was then lowered to 10psi to see the effect which resulted in a very substantial drop in power. Down to almost 150rwkw.
A few more runs were made and then boost was set to 12psi because I feel that 12psi is safe enough for the street and am happy to risk it. This resulted in a similar power level to the first run but much smoother with a few dips here and there. The tuner then adjusted the ignition timing a few degrees here and there and got a very nice smooth curve. There is still one dip near the top of the range but couldn't seem to get rid of it. Final result using a peak of 12psi was 197rwkw and a very smooth curve.
I am more than pleased with this result and noticed the much smoother power delivery on my way home from the tuner.