Don
Custom 180 deg crank or Ford 90 deg ? 90 deg would give non-symmetrical
firing spacing . 292 Chevy 6 drag engines shake flywheels loose but Ford
300 6s don't because of compatible / incompatible crankshaft harmonic
frequencies . Small dia multi disc clutch would help . Some Chevy racers use
tapered shank flywheel bolts and holes .
> Anyone silly enough to cut an engine in half should probably expect to
> encounter some "unusual" problems along the way. During a recent dyno
> pull, our half Windsor (3 liter inline four) sheared off all six Locktite
> secured 7/16" ARP flywheel bolts, and almost welded the flywheel to the
> crank. Seems that we have a harmonic vibration problem that has created
> more force than our system can tolerate. So.......... we probably need to
> strengthen the parts and reduce the "bad vibes".
>
> The most obvious action would be to strengthen the parts by increasing
> the bolt diameter, adding some dowels, and making sure that everything
> fits. Reducing the the force could be a little more difficult. The
> balancer (cheapo fluid type) is clearly not up to the task and should to
> be upgraded to something more in tune with this engine's harmonic
> characteristics. I really don't have any experience in this area and
> would greatly appreciate any thoughts that list members would care to
> share.
>
> Thanks, Don
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