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Tractor Pulling Discussion Forum

john deere 60

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jesse allen

12-12-2007 18:33:00




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I bought a john deere 60 for a pulling tractor a few monts ago. tractor is bored a few thousandths over with alluminum flat tops.i was wondering how much horsepower and compression i would have with the head shaved 250 thousandths?

thanks jesse




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deere eater

12-15-2007 16:06:21




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 Re: john deere 60 in reply to jesse allen, 12-12-2007 18:33:00  
why dont you quit playin with air compressors and buy a real tractor

just my opinion your local chicken house farmer



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jesse allen

12-16-2007 11:57:30




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 Re: john deere 60 in reply to deere eater, 12-15-2007 16:06:21  
you have must never driven a real tractor. honestly have you ever seen a 2 cylinder choke down in first gear



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buickanddeere

12-14-2007 18:16:38




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 Re: john deere 60 in reply to jesse allen, 12-12-2007 18:33:00  
The 1st three factors to work on and improve in order to win while pulling is traction, traction and traction. You could soup that 60 to 100HP and pull in 3rd gear. And get your butt whacked by a stocker 60 in 1st gear with good tires, proper width rims, ideal air pressure, max legal height drawbar and ideal fore/aft balance.



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ChadS

12-14-2007 17:02:26




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 Re: john deere 60 in reply to jesse allen, 12-12-2007 18:33:00  
I must be thinking of a 620 and the A pistons then,,, one of the two is a shorter block. Yeah, the difference in the 70 and the G was quite a bit,,, Had to remove some material off the pistons so it all fit inside. Bad thing is, if its low gear pulling, he may end up being too strong if he really hops it up due to the creeper 1st gear.. A few miles away, a fellow has a real nice 60, he pulls low gear up to 6500 with it, and it just creeps along and creeps along, but never heard it run out of power,, Thinking it was just a .045 kit in it.
At one time, I had a power block and pistons for a late A-60,, bought it from Polk himself, while he was auctioneering at a local sale. Got it for 50 bucks,,, he said, Merry Christmas!!! I said, Thanks Santa!! I traded it to another fella who was putting together an earlier A,,, a 47 I belive, wouldnt fit, so he set it aside and never used it. Wonder if its still there??
Are new ring sets avaialble for power block pistons?? Long time ago I asked Hastings,,, they said they could make em,,,

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BushogPapa

12-13-2007 21:31:56




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 Re: john deere 60 in reply to jesse allen, 12-12-2007 18:33:00  
Between 8:1 and 10:1 Too high for regular 87 octane gas, if you are pulling it hard.. LP pistons are flat-tops and are around 8:1 from the factory.. Work on the valve/seat areas with polishing the valves and combustion chambers and matching the ports and cleaning them up will be well worth the time...



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jesse allen

12-14-2007 14:35:32




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 Re: john deere 60 in reply to BushogPapa, 12-13-2007 21:31:56  
So how much horsepower should i gain?



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Drew

12-14-2007 15:48:56




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 Re: john deere 60 in reply to jesse allen, 12-14-2007 14:35:32  
I dont think you are going to see enough HP gain to warrant whacking 1/4" off the head. If it isnt flat, cut it enough to make it flat and quit. Because if you cut a 1/4" off, when it warps you wont have anything left to cut off to make it flat again and you'll have to start over again.

If you do end up whacking a 1/4" off, you will need to shorten your pushrods 1/4" so the rocker arms will adjust up correct.

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70 JD

12-14-2007 16:20:54




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 Re: john deere 60 in reply to Drew, 12-14-2007 15:48:56  
Could the 60 pistons be replaced with a set from an A? Or an overbore size from an A? One time, we took G pistons and put em in a 70 gas made a pretty good engine out of it. had about 180 psi of cranking pressure with a stock head. Dont know if thats possible with a 60 or not.



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Drew

12-14-2007 16:41:46




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 Re: john deere 60 in reply to 70 JD, 12-14-2007 16:20:54  
ChadS/70 JD,

"A" gas pistons and 60 pistons are the same so you wont gain anything there.

Putting G pistons in a 70G is a different story because you gain 1/4" bore and the G pistons are taller because a styled G block is not quite 1.375" longer than a 70G block (I think that 1.375ish" number is correct, dont have my notes infront of me at the moment).



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