Thanks for the suggestion. I don’t have the motor out yet, in a couple weeks it’ll be out so I’ll so I’ll get a better chance to look at it. Does anybody know if the number 426H-C on the underside of the piston mean anything? I can’t get to the top of the piston until I get the heads off.
I'm thinking that 426HC means 426 Hemi Chrysler so they can grab the correct tool (CRS on the proper name of that tool
) to use when they stamp, forge, the aluminum blanks into a piston
There are several other brands of race hemi motors like Brad Andersen, Allen Johson performance and as several others I can't think of now, which do not use the same combustion chambers on their race heads hence the need for different piston forging to match the heads
The original TRW, Speed Pro factory 10.5 to 1 compression ratio street Hemi pistons had the piston dome height above the deck right at .550, the race pistons with 12.5 to 1 ratio dome height was right at .750, the 13.5 to1 was near .800 with a lot taller and narrower dome
