Everyone on here is basically right, at least on the right track. I noticed you have an 02 WRX... Those are really not good to launch on. Ok, that's an understatement. Check under the hood for your transmission code on the data plate next to the drivers side shock mount. If it ends in AA, DO NOT launch on it using the method I do. If it's BA, congradulations! You have RA gears for 1st, 2nd, and 3rd. They are beefier and can handle more abuse.
1st- avoid the water box. You don't need to heat up the tires, and you don't want them wet.
2nd- stage the car slowly
3rd- hold the RPMs around 4500 (I have to go around 5500 because of the flywheel)
4th- preload the clutch, let it out to that point just before it engages
5th- last yellow comes on, quickly let off the clutch in a smooth motion. DO NOT SIDESTEP
6th- shift to second with your foot backed off the gas a little
7th- flat foot shift all other gears if your shifts are quick, should end up at the top end of 3rd
Couple quick pointers.
-I usually run about 20psi in the tires for better grip, at 32psi I tend to spin. This can differ based on track conditions so experiment, make sure you have an accurate tire gauge though.
-Try to find the sticky spot on the track at the start line, you'll get better traction
-Start at 4000 RPM and work your way up. Before the lightweight flywheel, I was launching at around 4750.
-You'll know you hit the right RPM and tire pressure combination when your 60ft times are at their lowest, too low RPM=bog=high 60ft. Too high RPM=slip/tire spin=high 60ft.
-The reason for the flat foot shift between 2nd and 3rd is your boost will return ALOT quicker if you stay on the throttle.
Using this, I was getting .002 reaction times and 1.8 second 60fts when I was "Stage 2." I haven't run since I put the VF34 on, gotta fix the downpipe and get the C12 tune for 24psi
Oh, I know when I get it right cause I go cross-eyed for about a half second. Can't breathe until third either.