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Tractor Pulling Discussion Forum

John deere 60 cam and fuel

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Stuart Martin

09-22-2003 09:05:58




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I was wondering what I could do to my cam on a john deere 60 to get more power. The rest of the engine and carb are stock and I have it bored out .45 on the cylinders. If i didnt touch the cam what kinda fuel could mix could I put in with out spending money on my carb. I have heard of a gas and ethanol mix that you can put in a stock tractor and get a bit more power. What combination of cam modification and fuel mixture could I go with if I wanted to do both. I have a extra stock cam and carb off of a parts tractor. Thanks in advance

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Big Jake

09-22-2003 16:03:41




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 Re: John deere 60 cam and fuel in reply to Stuart Martin, 09-22-2003 09:05:58  
I have a 1952 60 all fuel tractor ,ipull in 7200 to 9200 classes with 18.4x38's and have all ways spun out in low gear on pump gas . with the stock bore and cast pistons. good luck.



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Jack

09-22-2003 14:42:34




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 Re: John deere 60 cam and fuel in reply to Stuart Martin, 09-22-2003 09:05:58  
There is a 60 around here that has had caps put on the piston tops.He can spin 18.4 38's with no problem in the 7500 lb class.That was not expensive to do either.Electronic ignition and good fuel helped him too.He is running a stock cam also.Good luck.



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G-MAN

09-22-2003 10:47:48




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 Re: John deere 60 cam and fuel in reply to Stuart Martin, 09-22-2003 09:05:58  
There are several outfits that offer various grinds for two-cylinder cams. I've heard that even for a stock rebuild, it's a good idea to have the cam ground, as they weren't ground that accurately to begin with. It's probably well worth the $100 or so it costs to have it done, regardless of what you're using the tractor for. I can't help you on the fuel question, other than the fact that using fuel with more octane than your engine needs will generally hurt performance, and not improve it.

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Mike

09-22-2003 13:55:49




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 Re: Re: John deere 60 cam and fuel in reply to G-MAN, 09-22-2003 10:47:48  
Unless your really going to do the whole motor, I mean stroker crank and all the good head work and so on, I would just leave well enough alone, most cams I have used and been around, only help if you can run alot rpm, like 1400 or 1500 or more, and alot of places kinda frown on that, and your 60 will pull really good in stock form, at least mine does and it too is only .045 over and no other work, pulls to 8500 and never stalls out with that low gear, good luck.

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G-MAN

09-22-2003 15:57:27




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 Re: Re: Re: John deere 60 cam and fuel in reply to Mike, 09-22-2003 13:55:49  
When you're dealing with a 50+ year old component, with untold thousands of hours of use, there will be wear. The highest unit pressure in an engine is between the cam lobes and lifters, which was exacerbated by the poorer lubricants used when these tractors were new. I was told by a reliable source that even when brand-new, two-cylinder cams were ground all that accurately, and could be off by 5 or 10 degrees, which WILL affect the operation of even a stock engine. Having a cam reground doesn't automatically mean that you're hopping it up. Most grinders offer modified AND stock grinds. To me, it's pretty ridiculous to put $400+ in a set of aluminum pistons, another several hundred dollars in machine work and various other parts, and take a chance on a 50 year-old camshaft. Particularly when it's relatively inexpensive to have one reground and the lifters resurfaced. There are many tractors that have been otherwise gone completely through and still don't run "just right", and it's normally a camshaft problem, due to either wear or inaccurate valve timing. I have a stock "60", and it's a low-geared horse, but when overhaul time comes, I sure ain't going to split hairs when it comes to the camshaft. I'd rather know that it's right than guess. My two cents.

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TimC

09-22-2003 19:18:43




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 Re: Re: Re: Re: John deere 60 cam and fuel in reply to G-MAN, 09-22-2003 15:57:27  
I have a machinist friend that dealt strictly in engine machine work. Back in the 80's and 90's he never bought cams for rebuilds and always reground any cam going back in a motor because even with the newer OEM cams there was a lot of base circle runout.



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G-MAN

09-23-2003 13:45:54




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 Re: Re: Re: Re: Re: John deere 60 cam and fuel in reply to TimC, 09-22-2003 19:18:43  
Yeah, it just stands to reason that something machined 50 years ago, and beat on for thousands of hours since new, is not going to be perfect. It's the little details that add up to everything working just right.



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