Hi all, Hi Bill,
My blower is not fixed at all on the frame, it is part of the engine. Big vertical bracket bolts on the rear engine mount, that has 4 horizontal threads on top of the gearbox casting. The bracket is sandwitched between the Ansin main casting (gear side) and its outer cover, plus 6 longer screws.
Then one 1/2 thick alloy plate between crank drive and Ansin that act as as torque arm, it makes it impossible for the blower to go forward or backward. It required a bit of setting up, to start with, the belt had a tendency to "jump", but it did not took too long to mod a bit to suit. No problems since on the belt drive...
I do not run a byepass valve. Some of you here warned me about the "slowness" of a pressure relief spring set up, so my main safety is a burst panel, mix of cardboard and pasticised alloy sheet, has burst a few times on blowbacks, so good enough... Get stressed very fast, we changed the panel at every run last year...
Bye for now, see you next year, I'm moding the bike like furious...
Patrick