1: Put it in Neutral, rev to about 3000rpm and when it goes green dump it in drive?
Your a madman, and will do nothing but kill your gearbox and give you a reason to get a manual!!
2: Hold the brake pedal with the left foot and then still rev to 3000rpm and when it goes green let go off the brake. Does this method actually spool the turbo up though?
It will defiantly not rev to 3000rpm, with out your wheels spining
This is called "stalling" and yes it will make the turbo come on boost while you are sitting there, i have no idea with the later skylines, but the rb30et skylines, (what ever they are) come standard with a 2000-2100 stall converter, or this means exactly if you stomp on the picks and hold it flat, it will rev till 2000-2100 rpm before it starts to do a skid? i would not imagine the later models are any greater then 2000, as it hinders "old fart" drivability!
I have a vl turbo, and i can come on 10psi boost sitting still, (with the standard stall/torque converter), i have just upgraded it to a 2800-2900
3: Same as 2 except with park brake.
Wont work! park break wont be strong enough/wont be able to let it off quick enough,
4: High stall to always give 3000rpm when idling?
As i 1/2 explained above,
a histall is a modified torque converter,
This lets it slip till the desired limit,
a 3000stall is quiet large! and worth around $900? if built correctly!.
This will JUMP the car off the line, (if it dosent sit there doing a smokie) its like a controlled "dumping" the clutch at 3000/what ever you stall it to, very nice!!,
another thing to look at is shift kits,
once again. i dont know if they are available for these autos, but you can still "trick" them up by uping the oil pressure and a few more tricks,
Shift kits make it shift alot harder!, instead of the slopbox they come as standard!!
Anyway, i hope iwas some help!!
:edit:
tricked up Autos are fantastic for huge turbos,
with a big stall converter, say 2900-3300ish? you can sit on the line for 10secounds? or so till the massive turbo comes on boost, then leave the line with lots of beans!
You will have noticed this with alot of the drag turbo cars,
Ie that drag s14 a with the fj20det, that thing took about 20secounds to spool!! madness!!