I know that the Challenge rules state that the vehicles have to be 4-wheeled production passenger vehicles- but I have always been under the impression that this was primarily to prevent motorcycles from competing given the considerable difference in performance/handling/cost from traditional cars, and I wasn't sure if anyone had ever asked about bringing a true 3-wheeled car like a Reliant Robin or, as is the case in what I'm considering, a rather modified Daihatsu Midget.
I think you want to make a phone call to Holly Hill.
I wouldn't count on it.
It would be pretty cool to see the Elio make it (Well, first to production. Then to depreciation... THEN to the Challenge! )
There was the funky rotary powered bmw that year.... or did it have 4 wheels too? nope Google search shows 4 wheels, though in its stock configuration it might as well have 3.
Just add an unsprung, but free to move link off the back with a caster wheel on it. Technically 4 wheels, only three of them do anything resembling suspending the car...
I'm imagining the pro's face when they get asked to autocross a 3 wheeler. 
Seems like taking those cars on an autox course would be a major safety issue. Unless your modifications include making the front have two wheels and one in the back.
I doubt it would pass the SCCA safety regs.
Are you aspiring to win the most spectacular fail? If so I think your reliant robin idea is fantastic. Maybe treat it like bowling and go for the high score taking out cones while sliding on the cars side.
You'll need to log in to post.
