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JD A 44 more power?

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JD 4000

07-28-2002 08:16:48




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I have the engine apart really and block - head are in engine shop. I may have to get new piston but want to find what piston using in tractor pulling. I hear some say to change the cam shilf to a 620 or 630 JD. I not sure if this cam I have had been changed it had been repair before. so what's the # on cam in 620 and 630 does any one know? I went to a tractor pull the guy who drove a A down dirt real fast speeding he said he had changed gears in his tractor to make it go speeding. has any one done this repair?

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John

07-28-2002 15:15:32




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 Re: JD A 44 more power? in reply to JD 4000, 07-28-2002 08:16:48  
Put some .125 overs in it and that cam. It should give you around 47 or 48 hp. John



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lynn

07-28-2002 17:58:34




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 Re: Re: JD A 44 more power? in reply to John, 07-28-2002 15:15:32  
what is the differance between a cam and 620 cam degree wise to make them better..used 620 cams this winter for two guys..grind my own for my tractor few years ago..need to degree 620 cam and see what it is..lynn



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KB

07-28-2002 17:39:31




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 Re: Re: JD A 44 more power? in reply to John, 07-28-2002 15:15:32  
What if a person wanted to pull division 3 or 4, what does a person have to do? How big bore and stroke can you get and any advice on heads, manifolds or blocks? Can you bore and sleeve to where you don't need a power block and not have to throw the wife on the street corner to pay for such a set-up?? I am looking at beefing up a '46 A for division 3 pulling and am looing for helpful advice. Thanks.

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John

07-29-2002 08:58:45




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 Re: Re: Re: JD A 44 more power? in reply to KB, 07-28-2002 17:39:31  
9.25x6.125 (powerblock),or, 5.75w/o powerblock
you have to buy $1,000 rods though
John



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JD 4000

07-28-2002 16:24:00




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 Re: Re: JD A 44 more power? in reply to John, 07-28-2002 15:15:32  
what is the cam number? do you know.?



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