Mr. Moore
If you really interested in how it's done We at the Midwest Supercomp Series have been paying out 100% to the racers for more than 20 years. the entry fee is $100 plus what ever the track wants (usually $15-$20 bucks) Payout starts with the first round winners with the rest of the payout determined by the number of cars.
Several Super Gas and Super Street associations have come and gone in the midwest over the last twenty years so We must be doing something right. If your in the midwest next summer come check us out @
http://www.midwestsupercomp.com/
Regards