I'm of the opinion and subscribe to the concept that AN fasteners are very
good for a host of applications except for flywheels. I beleive sometime in
the remote past Mr. Kastner indicated that flywheels ought to be fitted with
the hardest and non-stretching bolt available. If I recall my #'s AN and
grade 5 SAE are similar in tensile stregnth and can flex a bit before
breaking. This "give" may be ok in certain applications but, flywheel
wobble at high RPM/harmonics is not that place.
I once checked flywheel runout and was surpirsed to see variations in
flywheels that I thought were good. I think that all flywheels ought to be
checked for runout...
Truthfully...who checks flywheel runout when assembling the motor?
I used a Ford off -the- shelf flywheel bolts (They are cheap..) They are
7/16" and just a bit longer but, it has a good shoulder and the excess
threads were cut off with and abraisive wheel. Obviously, the crankshaft
holes were also enlarged to accomodate this bolt.
Mordy
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