Stroker U moline

Umolinepuller · Jul 24, 2023

Hi, Im about to pull my 1949 U apart because I need more HP. I
have a GB moline crank sitting in my shop and my U already has
M5 propane heads, blocks, and pistons on it but Im having
troubles figuring out what I need to do so I can put my GB crank in.
Im definitely wanting a 120+ hp bump. Hoping someone knows
what I can do and where to find parts at to get the HP bump Im
looking for.

DPittman · Jul 26, 2023

Know a guy that had a seven inch stroker crank in his and it pulled extremely well. 800 blocks & heads helped a lot too. Even with custom made rods he still had to machine cam lobes down enough to get clearance for the rods to go around. Theres men out there that know how to hot rod Moline engines and make em last. Just need to see how deep your pockets are. My U just cant out pull the money anymore. Good luck

ChrisQ · Jul 27, 2023

I believe Welters would have the pistons you will need if wanting to continue using the M5 jugs. They are 4.81 bore piston with a higher wrist pin height to compensate for the stoke. With a 6" crank and short jugs you would need to shorten a set of 336 rods 1/2" to keep pistons at deck height on TDC otherwise. Buy the racing pistons, gain some bore size, and use 336 rods with 403 crank should make about 436 cubes I believe. If you use 283 rods you can offset grind and stoke crank to 6.25 making 454 I believe. At last that is what I put together many years ago in a 5 Star.

Stroker U moline

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