shift at 8000, if you dont, you're going to fall out of the GSR's powerband. (which is from 6000-8000). all the power is made up there. i could beat you in a stock LS the way you're driving your GSR.

i shift at 8200, because the higher you go, the less your RPMs will drop when you shift. don't spin your tires on the launch, but launch the highest you can. 2800 or whatever you said you launched at is WAY too low for a GSR.