if you are running in realy dusty track conditions, I would be on rubbers, or even do something that many hadn't seen in a long time. Take a tire and building it up with silicone...yes silicone. Once you have built it up, true it to size. It will give you more traction than you can imagine!
Best thing is that it is good for racing on any slippery or dusty surface and gives excellent traction. I used to keep a set of these in my pit box at all times when running parking lots and nobody could get grip. I'd put them on and just drive like Magilla Gorilla was on the car.
Once we were racing on a gym floor..it was sealed with polyurethane and we had so much traction we were traction rolling. (using electric pan cars)