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Tractor Pulling Discussion Forum

Re: 1940 B Horsepower

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Author  [Modern View]

03-13-2014 20:56:56

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Figure it out...

6 1/8" Bore and 7 1/2" stroke (might be more).

One '38 JD "B" pulls here in Ohio (Plain City) during the "Steam Show" and has won his class 2 years in a row.

It has one of "JDBPuller's" blocks in it. I think it is in either Div 3 or Div 4, around 3,500 lb class. Pulls in 2nd or 3rd and does NOT run out of power (4 speed trans in those older ones)..


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Josh Blackburn

03-14-2014 05:52:11

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 Re: 1940 B Horsepower in reply to BushogPapa, 03-13-2014 20:56:56  
Actually that's only 441.9 cubic inches. Even at 8 inch stroke your only 471. Did you do the math or going off here say.

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03-14-2014 22:50:00

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 Re: 1940 B Horsepower in reply to Josh Blackburn, 03-14-2014 05:52:11  

I could be way off on that stroke. I do know that he had to add a spacer over the crankcase inspection cover because the crank throws come above the original crankcase exterior. May have been at or over 8 3/4", but I really don't care. It has been done and the results are on the faces of the red competition I have seen in Plain City, Ohio. They say they just plain cannot match what he has.


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Josh Blackburn

03-15-2014 05:47:35

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 Re: 1940 B Horsepower in reply to BushogPapa, 03-14-2014 22:50:00  
The story changes. At 8.75 the crank would come through the gov. Big difference between 7.5 and 8.75. I don't really care either but atleast find out the facts before you throw imaginary information on here. Alot of people research these forums for good information and your posting information thats not true 6.125 won't fit in a 38 case either.

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03-15-2014 15:09:18

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 Re: 1940 B Horsepower in reply to Josh Blackburn, 03-15-2014 05:47:35  
Beg your parden BUB, but 6 1/8" WILL fit, with a different specially cast Block..

Stop "Thinking" you are a hot-shot and get OFF your High-Horse (pony)..

Open your eyes and look, several are and have been pulling in Ohio and Carolina for several years.

The one here in Plain City, Ohio is only 5 3/4" Bore, but can be bored to 6 1/8" also..

Facts is Facts, warp them any way you please.


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03-15-2014 07:37:06

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 Re: 1940 B Horsepower in reply to Josh Blackburn, 03-15-2014 05:47:35  
6.125 does not fit in any of the B cases- you have to patch over the hole in the clutch side that is made for the cyl. Sleeve. There is rumored a 6.25" one in the works with a 8.375" stroke which would be (I think) 510 c.i.

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03-15-2014 15:30:19

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 Re: 1940 B Horsepower in reply to Gtx1967jewison, 03-15-2014 07:37:06  
Well, at least YOU are better informed than your smart-mouthed friend..

Ray (at Extreme) perfected these blocks and some tried anything and everything to steal his design. IF he can lick that Pancreatic (cancer?) problem, he will be back.. Funny how NO body hands him any support or credit, just bad-mouthing and innuendos, when he cannot fight back while he is down.. I would not blame him if he told you all to go to Blazes.. I only come on here to try to offer information from experience of operating these in the REAL World (Farming). Which is more than most here will ever know about their actual use. These fellows who are squatting in here every day sometimes need to be dragged behind the Wood Shed once in a while. Wouldn't hurt my feelings if I never looked at this site again, but I refuse to let these Sneaker-wearing upstarts have the final say.. Probably wearing Designer Glasses and their Sister's pants(Nylon). Crap, I have Work shoes OLDER than most fellows on here... From what I had gathered, Josh seemed to be an intelligent Honorable builder, but often he has spoiled that by his piling-on in several instances that show a shallow, lack character.. His latest insinuation just reinforces what I suspected..

Ron. Most have no idea that my Shop has never been posted nor mentioned on here and will not be. Dirt-bags on here would just bad-mouth it like they have others or try to steal by one method or the other.. I only deal out-the door and cash on the Barrel-head.

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