[A26B]

Originally Posted by WVZR-1

Jerry,

What is the depth of the bore on the threaded flange on the crankshaft hub?

Effective, threaded depth = 1-5/16" (1.312") on the single crankshaft checked (4 bolt holes checked). I would recommend staying 0.100" off bottom, which still leaves plenty of thread engagement.

I had never considered the after-market flywheels but I did like the possibilities of the Strange ring gear bolts if I did consider one. Your steel SMF flywheel is how thick at the crankshaft mounting flange?

I do not have any steel billet flywheels in stock, although we can get them from RAM. Assuming they are dimensionally the same as our aluminum billet flywheels, the thickness of the flange under the bolt/washer is appx 0.387". The flywheel total flange thickness is appx 0.583" thick. The difference is the counterbore depth of the bolt holes (appx 0.196" deep)

If you are referring to the iron SMF I have in the webstore, the flange is 0.432" thick with no counterbore for the bolt hole.

I think another important consideration in comparison of different bolts, i.e. Grade 8 and ARP for example, is the threading method, cut vs rolled. There is a significant difference in fatigue resistance in favor of rolled threads.