Looks like a pretty cool challenge. I remember there being some talk about doing this on bobs4cycle a few years ago.
Here’s some of the dyno runs…
This years winning run. Johnny Myers’ 305 cc predator making an incredible pass on the dyno and doing it with only 8500 rpm. 33.19 hp!!!
George Owenby’s open entry for the 2019 competition.
Barry Young’s Stock Appearing 390 carb engine making 23.29 hp!
Johnnie Berry’s AKRA Stock Appearing ran to 9000 rpm and peaking at 16.79 hp on the dyno
Charles Mosely’s GX200 putting down a best run of 31.96 hp and pulling over 10,000 rpm!
George Owenby’s awesome Model 15 animal laying down 27.35 hp.