where do you guys usually launch at on boosted cars i launch at 4k which gets traction right away but theres lag for the turbo i was wondering if i lowered tire pressure to like 15 and there on like 25 right now then i could launch at 5k and get traction and have boost almost fully spooled...

 

Use your ebrake

I wouldn't launch at too high rpms unless you have good traction control devices (traction bars, fender braces, etc...) or you'll just spin. Having the tire at a good temperature will help much too.

 

Drag racing forum might be better able to help you.