First use of my new countertop.
I recently dug out a few crankshafts for future engine projects. Out of curiousity I put them on my shipping scale.
We have a 1.9 crank I modified way back in 1997 which had 3/4” ground off the counterweights by a machine shop, the journals ground undersize, and then balanced. And maybe just a few
hours of my time deburring and polished all the other forged crankshaft surfaces.
Next a crankshaft I inherited from Roger Wilson, in which he spent a similarly intense amount of time polishing it down smooth, then he sent it to Castille Crankshafts to have the counterweights knife-edged, the journals ground, and the crank balanced and nitrided.
Lastly, a stock 2.4 8-counterweight crank.
My lightened 1.9 crank came in at 31 lbs exactly, Roger’s 1.9 crank weighs 31.25 lbs, and the unmodified 2.4 crank weighs 41.25 lbs.
For comparison a stock 1.9 crank usually weighs between 36-36.25 lbs.
The lightened 1.9 crank I did will be going into a lightweight 12.5:1 compression 1989 cc hillclimb engine for me.
The knife-edged Roger Wilson crankshaft will be going into a 11.5:1 compression vintage-class prepared 1958 cc engine for me.
The 2.4 crank is for my father’s 2512 cc Opel GT turbo.
They will all be receiving ARP flywheel bolts, and will be doweled to their respective flywheels too.