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Cast or Steel Crank? Very little markings on this crank, need feedback.
Steel. Can tell by the wide parting line and the rounded corners on the counterweights.
In your first picture you can see the width of the parting line just below the main bearing. That's a forged steel crank. If it was cast, that parting line would be very thin.
Thank you for the feedback, very much appreciated.
I find it easier to look at the counter weights instead of the parting line. I can tell at a glance by looking at the weights.
When in doubt , stand it on its end and tap the counter weight w/ a small ball peen , cast=thud , forged =ping----------
and cracked crank goes...
Steel, #457 crank for a 340.
Shot peened also.
Bang Bang Bang Crrrrrunch........... At 6,000 rpm.
cast cranks have sharp counterweight corners. Forged are all rounded
newer aftermarket forged are cleaner looking than old OEM ones, can tell by full fillet bearings too. Cast usually have back cut bearing surface corners too.
Clear and simple. Great feedback & photos. Thanks
"Thud" weather it is cast or forged.
What is this crank to? 8 bolt flywheel and no grinding on the sides of the throws.
Stock forged crank pic, Eagle 4340 steel 8-bolt 440 ESP forged.