Dirt track at a drag strip??

I used to race at dragway 42 and the pit and return roads were lime stone and I had to run a air filter to keep the lime dust out of my engine, most guys ran with no filter at all, then I started to run 2 6 pack filters glued together and they were packed with white dust from the lime, I can't see a drag race running with a dirt track at the same time, who wants dirt in there engine?