Quote:
Originally Posted by tirod
....There's also another factor - windage from oil. Smokey Yunick spent some time in the 1960's getting high speed photography of a working crankshaft. In his book, Power Secrets, he publishes one of those photos. It shows a crank at high rpm with 3-4 quarts of oil wrapped on it..... |
Yes he does say "there is a tremendous amount of
oil caught up in the windage from the spinning crank and wrapped around the crank throws" but when he says "wrapped around the crank throws" I doubt that he meant that 3-4 quarts was added to the rotating mass. Sure there is a significant oil mist in the crankcase, and that "oil cloud" movement is "totally random" (quoting Smokey). That oil cloud would be consuming a small amount of power by resisting the movement of the rotating/reciprocating assembly.
The oil cloud doesn't negate the positive effects of balancing.
Incidentally - a great book (Power Secrets).
Cheers,
Glen