Power Crater piston chart

pistons used in the 4.00"bore x 4.50" stroke 226 cubic inch A-C engines. This should be handy for everyone doing overhauls to tractor pullers looking at various combinations. I have included engine serial number references and really the key here the letter code at the end of the serial number found stamped into the engine block on the carburator side

of the block approximately 4" to the rear (towards flywheel) and inline vertically with the carburator intake. For example a WD45 tractor with engine serial 45-12345-G the G designates the piston used in that engine originally. Referencing the chart we can see that was the common piston used in a WD45 gas tractor with a 6:50:1 compression ratio. The original power crater piston originated in 1953 and who knows whats in some of these old engines today. It's also nice to compare against all the aftermarket pistons avalible today. For instance Brand X offers a piston kit they say for the wd45, D17, 170, & 175 gas engines under one part number. Chances are the guy with the 175 engine may get a piston with a 2.390" or 2.500" compression height instead of the 2.645" height he had originally and now his newly overhauled engine cranks out only 49 or 50 horse instead of the original 61 horses. Brand X choose not to offer a piston with that height based on the fact that only a few thousand of that engine was ever made in fact I'm unaware of any aftermarket piston for the 175 gasoline engine, if their is please post it. Please let me know if you guys see any errors so we can correct. Knowledge is power!