I run similar power in mine and I was getting 14.4 1/4's, found out the below average time was due to a standard clutch and harder than standard rear suspension!
I run mine as a daily and as I'll only be on the strip 3 times a year, I don't want to start messing about with alignment/silly power/no interior I'm just gonna get some bits that I can swap over the night before on the ramp at work:
R33 4.1:1 diff (got shafts)
2x 255/50R16 Mickey Thompson ET Street Radial on LMGT4s for the rear
Standard rear suspension
Was also thinking of utilising the Launch Control function on my RLTC when it's finally set up, but will see how it goes without it as it's sort of cheating
I'm aiming for low 13s, maybe even high 12s on a good day.