So after 2 years I have come to a realization. Could my clutch be slipping under boost?
Back in 2010 the GTR was litterally bone stock, airbox and everything. I gave myself a redline of 6500RPM, so keep it mind this is my reference for gear speed. In 1st gear in WOT I would get to 50-60kph in a flash, then in 2nd gear at I would only get to 90-100 in second gear.
Two years later, after a lot of meticulously taking care of my stock engine and still abiding to my 6500RPM and no launch policy, I can only get to 30-40kph in 1st before having to shift into 2nd which doesn't fare better when I have to shift barely at 80kph. While the engine IS stock, comp is 170 through the board and I have a boss exhaust system.
Thing is, the slipping, if it is the case, is totally smooth through the powerband, enough for me to just have thought I had one slow POS GTR. Also, the engagement from standstill is normal, it grips nicely and the pedal is stiff. I even got my rear tires to spin (on wood planks) when I was removing my crank pulley in 4th gear with the handbrake on.
Anyway, what do you guys think? Also, if I do need a clutch, where could I get a decent single plate for my limited budget? It's not worth going to a super clutch since the rest of the drivetrain is stock, unbalanced and it's a fuse, after all.