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What size to bore A jd

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S.B.

01-22-2002 15:01:54




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Hey what size should i bor my 52 A john deere out to? what size pistons would i get and where would i get them i am in Rushville.thanks shohn




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WTW

01-24-2002 12:38:30




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 Re: What size to bore A jd in reply to S.B., 01-22-2002 15:01:54  
shon, I have a model 6-3 Power Block to fit your "A". You can run it stock with 6" pistons or bore it to 6.125 without sleeving or sleeve it bigger. If interested send me an email and I will give you all the details. Also know where there might be a Heisler head, as of a few weeks ago, may be sold by now?? Dave W.



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Todd

01-22-2002 19:47:20




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 Re: What size to bore A jd in reply to S.B., 01-22-2002 15:01:54  
What horsepower range are you looking at? What gear and weight do you want to pull?



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S.B.

01-23-2002 16:30:49




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 Re: Re: What size to bore A jd in reply to Todd, 01-22-2002 19:47:20  
I dont know what do most people run? i will pull mostley dead weight and live weight at local fairs, i want to pull it as much as possible



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Brad W.

01-07-2003 10:27:55




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 Re: Re: Re: What size to bore A jd in reply to S.B., 01-23-2002 16:30:49  
Is it possible to bore out a standard late model John Deere A tractor ( one tractor is a 1950 , the second a 1951 ) block to accomodate JD70 pistons ? I believe this is a 5 and 7/8 " bore. (JD70 ).(Will problems occur with the wrist pin size between a model A and model 70 and stroke differences ?? Thanks in advance for any input you
may have and your response.



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Todd

01-23-2002 19:30:22




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 Re: Re: Re: What size to bore A jd in reply to S.B., 01-23-2002 16:30:49  
Your tractor is refferred as a slow gear A. It has a creeper gear, and already is a very stout tractor if left in low gear. G Taylor is correct about the .045, .090, and .125 overbore. Now if you have the factory cast iron gas pistons the above mentioned pistons are aluminum and longer if you buy new ones. This will increase horsepower some. There are many different piston combos to use - the above mentioned, 5 3/4" bore (what I have, I believe they are caterpillar), 5 7/8" bore (70 gas pistons) 6" power block and pistons, power block bored .125 (6 1/8"). If you don't plan on stroking the tractor the aluminum 5 1/2" .045, .090, or .125 should be o.k.

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G Taylor

01-23-2002 18:49:30




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 Re: Re: Re: What size to bore A jd in reply to S.B., 01-23-2002 16:30:49  
In a stock block there is no diference in power from a 45,90 or 125 overbore. Now boring & sleeving or boring a powerblock with a little stroking is another matter. Some serious HP there with head/induction system work. Before uping the HP get a set of custom cut tires & tinker with weight balance. No use using all that high $$$ HP to throw dirt.



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Frankie Stevens

01-22-2002 16:44:52




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 Re: What size to bore A jd in reply to S.B., 01-22-2002 15:01:54  
Well my good man, it looks like i'm gonna have to break the ice on this discussion forum. First, you need to get a cooler of beer and some fried chicken. Then you're gonna have to go out and buy a set of snap lock ring nose pliers. I'm not sure what they are, but if you see some buy'em. What you'll need to do is find someone that knows what they're talkin' about cause i don't. I'm just one of those guys that wears dirty stained shirts and hats that melt in the sun. Who goes to pulls and drinks other peoples beer and poke around other peoples tractors acting like I know about tractor pullin'. If you have anymore questions then email me at [email protected].

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