I have a lightly modded Boxster S and cannot get my launch perfect. I have PS2 tires and some engine mods which bring my car to about 212 hp to the wheels. Any tips on what rpm's or other advice to get better at launching?

 

Are you seeking to "launch" during autocross or street?

 

Street. I take it to a quarter-mile track occasionally and either bog the engine or spin the wheels through first.