Aftermarket Cranks

[SSDiv6]

Originally Posted by jmantle

I fully acknowledge this stuff has been going on for years, just pointing out that some of us don't agree with it, especially in stock.
NHRA could have published separate approved rod lists for stock and SS and kept stock journal sizes in stock, never understood why they didn't.
As far as the weight of the cranks goes, steel weighs .283 lbs per cubic inch, ductile iron a little less depending on the grade.

Jim Mantle U/V/SA 6632

Jim, when they approved the rods, it appears the approved them based on length and disregarded the journal size and to compensate, at a later date, they published minimum weights for all rotating components.

As regards to the approval and use of other parts and since you said you read the whole rule book, you omitted to quote the section that addresses such parts and components:
SUPERSEDED AND/OR REPLACEMENT PARTS
Superseded parts are restricted to cylinder heads, intake manifold, crankshaft, cylinder block, and transmission only when manufacturer lists such parts in its published parts book, notifies NHRA of said change, and change is accepted by NHRA.