you cant use avgas for racing - rule book states commercially available for retail (or words to that effect) and i dont think the octane is over 100 for road race (but i could be wrong)
Avgas & similar are not good for your road bike either - we've used it on the drag cars (better to be a top fueller eh?)
but that is when AK (& gang) can strip & rebuild after most runs.
C
