Quote:
Originally Posted by Formulajones
Here is more of the balance job that was supposed to be "perfect"
First pic is the before, second pic is after Paul was done with it. I think this was the flexplate.
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Wow, that's a nice balance. Our balancer can't get that close. It is a 1998 Sunnen DCB750. It can balance a heavy crank like a Pontiac to a 3 gram tolerance overall in high speed mode. +-1.5G. That's the best the software will allow. For reference, a 5/16" little stainless washer from ARP weighs right at 1 gram. The software give a fudge factor of 2 to 4 grams for 10W-30 vs 20W-50 oil sticking to the crankshaft and being flung around in the crankcase. Yes, a balance of 0-0 would be best and perfect. But a commercially rotating assembly kit within 8 grams left and right would be considered pretty darn good IMO.