Later d17 saved from fence row

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   M & W were 7.5 to 1 compression with a 4 1/8" bore. Don't get confused here. It was two things: bore and compression. Raising a 4 inch bore from 7.25 to 7.5 to 1 compression would indeed be a minimal increase in HP.  WD45's can use D-17 pistons and sleeves and just like M & W's give the crankshaft a real workout if it is a plowing/discing tractor. Just the compression increase on a WD45 to 7.25 to 1 would yield 5 to 7 HP I think at 1400 RPM. I'd have to check my engine specs book at home, I'm going from memory.

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DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 22568	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 33 minutes ago at 9:57am
	M & W were 7.5 to 1 compression with a 4 1/8" bore. Don't get confused here. It was two things: bore and compression. Raising a 4 inch bore from 7.25 to 7.5 to 1 compression would indeed be a minimal increase in HP. WD45's can use D-17 pistons and sleeves and just like M & W's give the crankshaft a real workout if it is a plowing/discing tractor. Just the compression increase on a WD45 to 7.25 to 1 would yield 5 to 7 HP I think at 1400 RPM. I'd have to check my engine specs book at home, I'm going from memory.

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