'True' Factory Compression Ratio's

'True' Factory Compression Ratio's

Much closer to the correct Compression ratio when these Mopar Engines
left the factory.

1968 and 1969 ..... 383/335 HP

Factory Listed
* Compression Ratio ............ 10.0 - 1
* Piston Deck Height ........... {+.021" above deck}
* Head Gasket {Steel Shim} .. .020" Thickness

Cylinder Heads .... #2843906 {Open Chamber}
Combustion Chamber CC's .... 79.5 {Minimum} ..... Factory Level = 87.0 CC's

Typically, the Flat-Top Pistons sat below the deck, and down in the
Cylinder anywhere from {-.010"} to {-.020"}.

'True' Compression Ratio as it left the Factory ......... 9.25 - 1