Page 8 of Lunati Pistons by Holley Performance Products, Inc.

other calculations cams helpful calculations cylinder bore diameter valve train cylinder bore diameter square root of [engine displacement stroke x 0.7854 x number of cylinders example 1 engine displacement =350 cubic inches stroke length 3.480 number of cylinders 8 cylinder bore diameter square root of [engine displacement stroke x 0.7854 x number of cylinders cylinder bore diameter 349.8486 3.480 x 0.7854 x 8 cylinder bore diameter 4.000 pistons example 2 nascar has a 358 cubic inch maximum engine size rule if we use a 3.480 stroke crank what is the biggest bore allowed engine displacement =358 cubic inches stroke length 3.480 number of cylinders 8 cylinder bore diameter square root of [engine displacement stroke x 0.7854 x number of cylinders cylinder bore diameter 358 3.480 x 0.7854 x 8 cylinder bore diameter 4.046 rods cranks formula for milling pistons for 4032 material only piston dome cc s to gram conversion 1cc volume 2.8 grams weight this is a good way to remove excess dome without having to re-cc piston mill a small amount and re-weigh piston until total reduction is reached engine kits example a piston has 12.5cc effective dome volume the desired effective dome volume is 10.5cc to remove 2.0cc cut 5.6 grams 2 x 2.8 from the piston dome apparel tech line 662-892-1500 229

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