well another auto R32 driver here, but i think people are underestimating the drivetrain losses with the auto box
i made 132rwkw with 3" turbo-back exhaust, FMIC, filter, rb26 cams, and 12psi (running very rich)
my tuner suggested i would have approx 155rwkw if it were manual, based on what he has seen in his experiences, which is about what zoom magazine found when they converted the rb20 r31 to manual and picked up 20rwkw
saying that though, the off-the-line work is very easy to get consistently right and stalling the auto can counter for the lag by never being off boost in a drag race
i have noticed though that when you change the gearstick (eg from 1 to 2) there is a delay of about 0.5-1 sec before the gear actually changes and its a bit of a pain in that regard...
i would also recommend a trannie cooler which i have installed on my car
but i have never 'raced' a manual skyline so i have no way to compare its performance...
cheers,
Waz.