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Posted by clueless [201.202.29.210] on Sunday, April 01, 2012 at 10:51:01 :
In Reply to: Back in, on one PC at least - good morning posted by Gordon_M [92.236.122.98] on Sunday, April 01, 2012 at 09:07:29 :
me putting a 265 crank and rods on my 237 pistons in my wc62 and this tidbit from a hotrod forum
so, the maximum bolt together mopar flatty - without getting very complicated would be:
Long mopar flathead block @ 3.438" stock bore. Use a 226 slant six piston with .060 overbore netting you a finished Bore of 3.460". 226 slant piston has a compression height of 1.750 and the wristpin offset - you want the offset in the direction of crank rotation.
Long mopar "Crown Marine" crankshaft (265 CID) @4.750" stock stroke. Offset grind the journals .125" to get the stroke out to 4.875" and use the rods from a 217CID "short" block mopar.
End result, poked and stroked flatty mopar on the cheap - off the shelf slant six pistons and very light custom machine work around the block deck/piston head. Everything is off the shelf and you get a whopping 3.460" bore x 4.875" stroke = 275 CID of bone wrenching torque.
Crown Marine cranks are not junk either - forged steel and can take lotsa punishment.
not to mention this pic of my monster 21 leaf bogie spring pack
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