> The Series V crankshaft is 5 main bearings and is forged steel, not
> cast iron, hence my remarks.
If you still are of the opinion the crank is cast iron, I would say
that a person in the drop forging business or otherwise qualified in
this subject, should examine a SV shaft and advise us all. Until
such time, I say it it a lovely steel forging. I stand ready to eat
humble pie if required by the "expert on forging".
after a quick inspection of the cranks out back, here are my
observations..
there is a parting line on the cranks, but both forgings and castings
have p/l's. both are a form of molding!!!
there is not a rough grain apparent in the crank, hinting towards
forging.
machined, but un "finished" areas are much brighter than i would expect
in cast iron
the p/l has indents in it, where flashing was either cracked off after
casting OR where the forging procsess didn't completely fill.
the p/l is more smooth than jagged, a sign of forging. a de-flashed
casting would be more rough and jagged. forgings, well done, have little
flash, and are smooth to the touch.
dings in the counter balances have soft edges, signs of a malleable,
middle hardness, material, but don't show the roughness at the edges that
cast iron can show.
the rough surface of the unfinished areas looks like either. it doesn't
look to different than the rough areas on forged hand tools, or the cast
iron nut that holds the crank pully.
to the touch, the cranks feel to hard for castings.
you may call bullshit on that last observation, but i have extensive
experience assessing the hardness of steel sans testing equipment. my
guesses are often within 2 on the rockwell scale when operating in the
30-60 range.
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