To add to my previous post, Steve Bennett told me that the GPASC
crankshafts were made by the same factory that makes SCAT cranks (and
perhaps EMPI as well), but with changes during manufacturing to
incorporate the big "Force One" bearing up front. The bearing itself is
just aluminum, but very precisely machined to fit the crankshaft. They
are "hand matched" before sale. The engine case must be bored to accept
the much larger bearing also.
Presumably, the folks that now run GPASC have continued to use the same
sources and processes, since it was a winner that actually works! It
took the CorvAircraft world a while to catch up, but a similar solution
has ended broken crankshafts in flying Corvair engines also.
----------
Mark Langford
m...@n56ml.com
http://www.n56ml.com
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