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Tractor Pulling Discussion Forum

Fuel Mixture for pulling

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Phil K.

07-18-2004 12:30:24




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Hello, im hoping i can get some info from some of you out there. ive been hearing lately about people mixing different fuels for tractor pulling? for instance 50% gas, 40% Kerosine, 10% diesel. or 50/50 gas/airplane fuel. etc. anyone got any pointers, i dont want to try these and end up screwing up my tractor. which is a 1945 J.D. GM at Stock RPMs im getting about 45-46 hp. thanks everyone pleasse keep in mind im a rookie at the pulling, im used to just the stock tractors playin around at the local fair.

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buickanddeere

07-19-2004 20:38:40




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 Re: Fuel Mixture for pulling in reply to Phil K., 07-18-2004 12:30:24  
20% methanol and 80% nitomethane. Fuel delievery will have to be increased roughly 8 times at that mix if memory serves. Seriously. Install a gasoline manifold, 8 to 1 pistons, three angle valve job, blend the valve bowl edges smooth, match the ports, a cam from Roberts, straight stack, dry airfilter conversion and a Pertronics ignition system. 65-75 HP.
Should be able to run in the 6500 and 8000lb classes with that very fast 1st gear.

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Greg H.

07-19-2004 09:55:56




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 Re: Fuel Mixture for pulling in reply to Phil K., 07-18-2004 12:30:24  
Phil,
unless you are running realy high compression, don't mess with any racing fuel, you'll just be wasting your money. If your ignition is good, your tractor should run well on regular 87 to 93 octane. I know some folks that have shaved the head, and installed LP pistons that need 100 plus octane, but if your stock you shouldn't. Aviation fuel usually has a lead aditive,so there realy wouldn't seem to be a reason for any lubtricant. Also if you take 115 octane, and add any other oil with it you are lowering your octane rating on the original 115 fuel and sort of wasting your money. Just run the lowest octane gas in your tractor that your tractor will run well on. If you know of anyone with a dyno, you might try to test your tractor on different octains, or mix in a little karo in with 87 and see what type of horsepower changes occure. With my 66 4020 gas with only a 7.5 to 1 compresion ratio,I make good horspower on 87. Good luck, Greg H.

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Shotgun

07-19-2004 08:20:04




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 Re: Fuel Mixture for pulling in reply to Phil K., 07-18-2004 12:30:24  
Im trying 1/2 reg. and 1/2 kerosine in a stock A does well ruff on plugs.



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Eric W

07-18-2004 18:40:22




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 Re: Fuel Mixture for pulling in reply to Phil K., 07-18-2004 12:30:24  
I have used 50% 90+ pump gas and 50% 120 aviation before. It seemed to boost a horse or two and kept my plugs cleaner. You need a good high compression motor to really gain much with high octane. I blend with pump gas to keep a little lubrication. I would like to hear more about mixing diesel and kerosene with gas?



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Phil K.

07-19-2004 19:52:32




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 Re: Re: Fuel Mixture for pulling in reply to Eric W, 07-18-2004 18:40:22  
Well, ive heard it once again today about mixing gas/diesel/kerosine. aparently this guy said it would only work if you can get the engine up to about 200-220 degrees, cuz he said the hp ratio of the slower burning fuels give you more HP. thats all i could get outta the conversation that made sense.



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Jeff

07-18-2004 14:42:35




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 Re: Fuel Mixture for pulling in reply to Phil K., 07-18-2004 12:30:24  
I have heard of some people using a mixture of 2/3's premium and 1/3 115 octane racing fuel with just a touch of marvel mystery oil in it. From what I have seen it does pretty good and doesn't seem to hurt it any. I would guess that the oil is for a litle extra lubrication but don't really know.



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