IDK, maybe 8 mph with new sneakers. but after that my knees are gonna sing a pity-me song, for a bit. But in my workboots, 4 mph is already pretty fast.
An old member here (Mike Beck?) ran very low 12’s in his Duster with a very similar cam. A few things went south on the 360 while it was still being sorted out and he stopped racing.
Family first!