The compression height is the distance from the center of the pin hole to the deck of the piston. Ross custom pistons are available in any practical compression height to compensate for stroker or destroker cranks, long rods, or blocks which have been milled excessively, etc.

To calculate the compression height, please use the following formula:

Block height minus 1/2 the crank stroke, minus the rod length, minus the deck clearance (amount piston is “in the hole”).

For example, a 350 Chevy engine with a stock 3.480 stroke, stock length 5.700 rod, standard .017 deck clearance and standard 9.025 block height would be:

3.480 stroke divided by 2 = 1.74

9.025 – 1.740- 5.700 – .017 = a compression height of 1.568