Since this is about drag racing and not MX, you still need to make a suspension adjustment;
Your compression should be set very soft (fast) COUNTERCLOCKWISE
(I use one turn from fully counterclockwise)
This will enable your suspension to collapse quickly and transfer energy to the tires where you need it.
Your rebound should be set a little on the stiff (slow) side CLOCKWISE
(Try 3 clicks from stiffest position)
When the suspension collapses on initial launch, your going to want the energy to stay rearward. A slow rebound will keep energy transfer from the rear shock compression to full extension steady and smooth. Since your usually dealing with a whooped out section rather than a track, you'll want to allow for enough rebound so the suspension doesn't pack up.
As with all forms of racing whether it be quads, street bikes, cars, tire pressure / selection will have an impact on traction. If you enounter alot of wheelspin at launch then the energy is being absorbed at the chassis and not reaching the rear tires. With an ideal suspension set up when you drop that clutch you'll need your shoulders over the bars to keep the front end down. That's when you'll know your hooking up like you need to in order to win.