It is really the octothorpe (a fun word to use in casual conversation).
Jeff / John,as a retired engine builder / mechanic, the COUNTERWEIGHTS on the crank are there to offset the weight of the connecting rods and pistons. Period.A "heavier" crank with "lighter con rods is just going to shake the fillings out of your teeth, and rip up the main bearings.Been there, seen that.Same with a lighter crank and heavier rods, except that this combo shakes more. (because the heavier part is further from the centerline of the crank).I don't grok the math, but I have seen the results.Chris.
but competitive racing is a matter of inches and feet over hundreds of miles.
I think you'll find it's more of ounces and inches.....and yes, when balancing a crank, it was always as a short block, with a pumped in oil supply.Back in the olden days, after a "little work", I was able to get my 71 455HO to 7300 RPM regularly, with an occasional missed shift hitting 8000, where my rev limiter kicked in.Did I mention I did a "little" work to that engine ?
(his was a street build, not a competitive racer)Chris.
Irony is that my current daily driver is a 32 valve DOHC, fuel injected, 5 speed, with posi-traction. 50 years ago that much automotive technology wasn't even on my dream list.
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