Our crankshaft came home from Soren’s today. It is super clean and nicely bagged.
He was able to lay claim to the 912 (counterweighted) crank we looked at before. Including rework, it will ultimately cost the same as a new AA crank, but is a Porsche original part. The numbers appearing on the lobes are a bit confusing. 616.102.015.00 is in the Porsche parts book as an S90. and 616.102.015.01 as from a 356 SC. The latter being on the counterweighted lobes. Again our late great friend Harry Pellows comes to the rescue, his book documenting that the 356 SC and 912 cranks are identical.
The crank came to us well within specs. Straight, no run-out, balanced from the factory. It did not have to be ground, but was magnafluxed and polished. I will take it back later to balance the complete rotating assembly (i.e. crank, flywheel, clutch cover, front pulley).
Next up is getting the correct flywheel, and taking Soren the crank pulley to balance and polish the sealing surface.
