Quote:
Originally Posted by Jerry Clayton
Can someone explain to me what is a BOB weight??????????
Intake and exhaust runner lengths will probably effect accel rates on an engine more than mass of rotating assy.
List and verify your engines acceleration rates and show cam specs and balance card.
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Absolutely, spoken from an engine builder and not a figure skating enthusiast.
There's a lot more to it than reciprocating assembly masses, hence my example of one of Jon Kaase's mountain motors, 4.8" bore, 5.75" stroke, with 7.750" rods that weigh a chunk....but yet respond instantaneously and will pull to 10000 rpm.