The Ford Barn

krswen · 08-07-2010, 06:49 PM

Does anyone know the rod length (center-to-center), piston pin offset (if any) and whether the cylinders are offset from the crank?

Ken

craneygartz · 08-07-2010, 08:03 PM

Quote:

cylinders are offset from the crank?

The crank is offset .125" from the cylinder center lines. It is closer to the valves by this amount.

John Oder

372dart · 08-07-2010, 08:08 PM

The rods should be 7.500 center to center.

MikeK · 08-07-2010, 08:15 PM

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Rods center to center 7.500".
Piston pins zero offset, 0.9997 in 1.0000 hole.
Piston compression height (pin center to flat top) is a very odd and high 1.906".
The cylinder bores are offset in the direction of rotation (toward the driver's side) 0.125". The stock deck height (crank center to gasket surface) is 11.500.
They were usually 11.505+ when new, on the high side of the tolerance.
With a 4.25" stroke, if you do the math the pistons will stick up 0.031" on a 11.500 block.

08-07-2010, 06:49 PM	#1
krswen Junior Member Join Date: Jul 2010 Location: Eureka, CA Posts: 24	some engine questions ... Does anyone know the rod length (center-to-center), piston pin offset (if any) and whether the cylinders are offset from the crank? Ken

08-07-2010, 08:08 PM	#3
372dart Member Join Date: Jul 2010 Location: Tiffin,Ohio Posts: 36	Re: some engine questions ... The rods should be 7.500 center to center.

08-07-2010, 08:15 PM	#4
MikeK Senior Member Join Date: May 2010 Location: Windy City Posts: 2,919	Re: some engine questions ... Sponsored Links (Register now to hide all advertisements) Rods center to center 7.500". Piston pins zero offset, 0.9997 in 1.0000 hole. Piston compression height (pin center to flat top) is a very odd and high 1.906". The cylinder bores are offset in the direction of rotation (toward the driver's side) 0.125". The stock deck height (crank center to gasket surface) is 11.500. They were usually 11.505+ when new, on the high side of the tolerance. With a 4.25" stroke, if you do the math the pistons will stick up 0.031" on a 11.500 block.