Trying to get a GTR with over 400kw out of the hole cleanly can be very difficult...
Alot of it is to do with the clutch. 400kw GTR needs a much bigger clutch with quite a sharp pick up as compared to a rwd, due to the available grip and weight...
With a manual rwd skyline, part of the launch IS wheelspin, the fastest way out of the hole is a perfect ballance of grip v's slip v's fwd movement- the wheelspin is directly controlled via throttle input.
Launching a GTR is the sweet spot between bogging on the line and flurry of awd wheelspin. A GTR will torque steer quite badly if the front wheels spin... fkn scary actually. The best way I can describe it, is feeding the car onto the torqueband.... easy to say, much harder to do.
My car has an OS giken r3c... basically an on/off clutch, thus trying to 'slip' of 'feed' with it is fkn hard enough, then throw in a violent launch/fwd movement and all your leg wants to do it fly back (off the clutch). The difference between a good and a bad launch is about 3mm.
Auto's... well it's the fastest and most consistant way to race almost any car. If I didn't want to drive my GTR on the street (and I'm a purist) I'd throw a AWD big auto under it and run faster and more consistant times.
It still aint easy though.
If you wan't to go fast on the drag strip.... big cubes/boost, auto, slicks, solid diff and a light car.
RWD- launch on th throttle
GTR- Launch on the clutch
Justin.