Thread: Inexpensive forged FE stroker crank?
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Old 02-22-2006, 04:21 PM
Carnut427 Carnut427 is offline
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Cobra Make, Engine: ERA 427 w/496 Side Oiler, roller, dual quads
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Default Inexpensive forged FE stroker crank?
Using a 391 crank:
Offset grinding a 391 crank to BB Chevy bearing size could achieve a 4.256" stroke; by offset grinding only to a 4.250" stroke, you would assure a fully ground journal. Offset grinding may also remove enough metal so that little or no heavy metal is needed to internally balance the crank. The Chevy bearing is a bit wider, I don't know if that would weaken the crank? If this will work, I think it might be able to be done for no more, possibly less, than a Scat "Cast Steel" stroker.
Obviously, I'm looking for comments on this idea.

390 = 3.78" stroke, 2.4384 inch rod journal diameter.
BB Chevy=2.2" rod journal diameter.
.238" difference (doubled)=4.256" stroke
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