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Tractor Pulling Discussion Forum

Question for Mr. WTW

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Mopower

08-03-2007 08:01:35




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According to many folks, you are a John Deere authority. Your posts are researched and well explained. I am not a Deere puller but I like my 1939 H. My Moline 4cyl pulling engine requires an inexpensive long rod suitable for offset grinding the crank. The stock M-M rod is 9". A Deere H uses a 9.5" rod with 2-1/16 journal. Offset grinding gains me 9/16" of stroke. The offset rod cap is like my Moline's.

With approx. 280 cubes, 11:1 compression, and 2000 RPM, would an H rod hold up for this application?

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WTW

08-03-2007 10:02:39




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 Re: Question for Mr. WTW in reply to Mopower, 08-03-2007 08:01:35  
Sir, Like you not being a JD guy I am not a Mini Mo one either. Here are my thoughts. The first concern I would have over the integrity of the H JD rod would be the small rod crank journal. The MM will have the power/torque of the front three cylinders going through this small diameter journal at the fourth rod. Will it be strong enough to take it? The JD H rod does not have an offset cap which is a big plus when it come to stroking and room to do it in. If I were you I would talk to the guys that pulls Moline's and pick their brain. Most pullers of the same brand will share information and even some of others will too if you get to know them. Can't beat the advice from the guy that has been there and done that. I do not know what area you are from but I do know there is allot of good running Moline stuff in the south. Keep inquiring and I am sure you will find someone that will steer you in the right direction. You are doing the right thing by asking questions fist. Good Luck, Dave Wickman AKA WTW (Wickman Tractor Works)

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Mopower

08-03-2007 10:39:42




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 Re: Question for Mr. WTW in reply to WTW, 08-03-2007 10:02:39  
Dave,

Thanks for the advice. I know a couple of the big MM builders quite well. The 100 horse UB I pull is fun, but I'd like to get into the light classes. I am confident in the crank and MM pieces, but trying to avoid a custom rod if possible. As with MM, Deere overbuilt it's engines and trannys, but even so an H was 4.25:1 compression and 12 ponies at 1500 rpm max. Still makes me wonder, but I'd like to do it right (and cheap) the first time. Anyone ever pump up an H?

keep that Killer B goin,

Ethan Berry
Vermontville, MI

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WTW

08-03-2007 12:11:53




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 Re: Question for Mr. WTW in reply to Mopower, 08-03-2007 10:39:42  
There was some local boys years ago that had hopped up an H including bore and stroke. The problem was they kept twisting off the camshaft. After several times of that they gave up on the H for pulling. DW



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