Tire pressure on slippery track ?

Tomorrow I'm going to participate in local drag racing event, where we are going to run on the ordinary street, closed for traffic of course. The pavement there is very slippery so I'm wondering what kind of tire pressure I should use, as low as possible or is it better use higher pressure ? I'm running 255/50-16 BFG DR's and it's M6 car.

I'm also not removing my audio equipment from rear (appr 80 lbs.) to achieve better traction off the line.


Thanks

Try right around 20 lbs. Any less and they'll cup and lose traction.
With the extra weight in the rear maybe even a little higher? 22-23lbs.