The Ford Barn

Charlie ny · 01-26-2021, 12:22 PM

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The 2nd and 3rd motors in my '41 pickup were fairly close in spec.
#2....3 3/4" crank ,bored .06 and a set of slightly milled EAB heads..I had to down shift to second 1/2 way up my test hill
#3.....4" crank, bored.08 and set of EAB heads that I spent hours on matching the comb chambers to the actual piston crown ending up with .040 clearance (with head gasket installed) between the crown and the chamber. No down shifting required on my test hill. Interesting here ,this motor labored some 1/2 way up but as the grade
level slightly it began to accelerate and pull to the top.
Ron Halloran and John Lawrence will have invaluable insight here. Things like piston speed and rod angularity begin to influence the bottom line ,which escapes me.
Charlie ny

01-26-2021, 12:22 PM	#6
Charlie ny BANNED Join Date: May 2010 Posts: 3,019	Re: How Close to (Over)Square In V-8 Bore/Stroke? Sponsored Links (Register now to hide all advertisements) The 2nd and 3rd motors in my '41 pickup were fairly close in spec. #2....3 3/4" crank ,bored .06 and a set of slightly milled EAB heads..I had to down shift to second 1/2 way up my test hill #3.....4" crank, bored.08 and set of EAB heads that I spent hours on matching the comb chambers to the actual piston crown ending up with .040 clearance (with head gasket installed) between the crown and the chamber. No down shifting required on my test hill. Interesting here ,this motor labored some 1/2 way up but as the grade level slightly it began to accelerate and pull to the top. Ron Halloran and John Lawrence will have invaluable insight here. Things like piston speed and rod angularity begin to influence the bottom line ,which escapes me. Charlie ny