Dyno Testing A Home-Built Pontiac Motor - Backyard-Built Bruiser
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Speed Pro file to fit 1/16-inch rings and a 3/16 oil ring were used on the Ross pistons. The compression height of the piston is 1.290 inches, thanks to the longer-than-stock 6.800-inch rods (stock is 6.625 inches). Some engine builders like long rods because of increased dwell time at top dead center, less angularity of the rod (which results in less side loading), quicker building cylinder pressure and the piston can be made shorter, therefore lighter. When using the Eagle crank, it also becomes a matter of economics. With only the 2.200-inch rod journal available, the 6.800-inch rod is simply a big block Chevy piece, which is affordable. In order to get a 6.625-inch rod with 2.200 big end, you have to go custom and that gets expensive. View Related Article
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