If you really want to see how fast the Fox 35 Stunt can go, remove the fuel restrictions!
Al
I don't want to get into the business of revising somebody else's rules.
But in my opinion, the event needed more guidelines of what constitutes a "modified Fox 35 Stunt".
They didn't even require you to use the crankcase.
As it stands now, the event is only open to those who own or have access to a really good machine shop.
But the AMA Rule Book already has about 20 speed & racing events for engine builders.