Hi, I just recently purchased a Skyline GTR Vspec. I have some problems which I don't know what's the cure or what causing it.
The problems are:
1. The clutch didn't make very loud rattling noise when the clutch is released (barely noticeable) when I got it 2 days ago, but last night after a hard launch, I floor the pedal 100% and the clutch feels slipping a bit on the top end, but after the 2nd try, I just floor it 70% and the clutch didn't slip at all (I launch at 6000 rpm). After the run, I realised that something funny happens. The rattling noise when I release the clutch is getting louder (on the 1st gear and 2nd gear only), is that normal? make a bit funny noise, the previous owner said it use ceramic racing clutch from Excedy. I do realise that racing clutch usually are noisy, but as when I bought it, it didn't sound that loud, and after last night I'm a bit worried.
2. I use AVCR on the car, however it was set at 0.9 bar, and after the run I check the peak boost was recorded 1.0 bar. Is this normal?
3. What is the best oil for engine and gearbox, brake, etc I can buy? The car has HKS pistons. Can anyone help me with the grade and brands?
I would be very happy if someone can give me opinions or suggestions.
Cheerz,
Pete