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Ol' Ron · 03-15-2023, 05:03 PM

CONSIDERING THE FACT THESE NUMBERS ARE "factory" I'd refer you t jowl's book. The 239ci flathead had 79 HP, and nonmetered what you did to the 239 engine, hecouldn't get 100hp from it. so i doubt ant HP clams from the "Factory" Read the book!
Gramps

03-15-2023, 05:03 PM	#11
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	Re: Iron vs. aluminum head compression CONSIDERING THE FACT THESE NUMBERS ARE "factory" I'd refer you t jowl's book. The 239ci flathead had 79 HP, and nonmetered what you did to the 239 engine, hecouldn't get 100hp from it. so i doubt ant HP clams from the "Factory" Read the book! Gramps