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Tractor Pulling Discussion Forum

making an M more powerfull

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stock m

11-06-2005 15:53:38




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what can i do to my 1950 M to make the motor increase HP? please include any casting numbers and part numbers. and if anyone has any pics of their hitches and wheelie bars i am needing sum hints. thank you all




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ChadS

11-07-2005 10:04:46




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 Re: making an M more powerfull in reply to stock m, 11-06-2005 15:53:38  
What style of pulling do you do? Stock, low gear? Modified any gear? What tires are you using? Those factors, determines what kind of engine you need. ChadS



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stock m

11-07-2005 15:23:43




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 Re: making an M more powerfull in reply to ChadS, 11-07-2005 10:04:46  
i usally pull stock low gear but i want it where i can pull either i havent gotten tires for it yet any ideas thanks



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ChadS

11-08-2005 06:05:38




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 Re: making an M more powerfull in reply to stock m, 11-07-2005 15:23:43  
Read your rules,, you need to know what your allowed to do in your classes. Best advice is to go get a SM-450 short block for a start. That gives you a 4-1/8th bore at 281 cubes. Quite a jump from the old 248. or 264 you have. The cam and heads are better in design in the newer engines, you can also get a SM flywheel, which has a bigger clutch, and is about 12 lbs heavier than the M flywheel. That will give more torque by the weight of the flywheel. You can get a 281 up to 70 hp pretty easy,,, using the 450 head and cam, a little bit of work to the head to raise the compression, and air flow. So really its sort of a parts hunt at the moment to prepare for a larger displacement engine. See, If you build up thr engine, and the clutch cant hold it, well, you will have to do something again to fix the problem, so I do recommend the bigger flywheel right off the bat. Engines are what ever you choose to spend for HP,,,, $1000 bucks can get you over 70hp,,, which would be a great low gear puller, or if you want to spend more to run over low gear, then look for economicly priced kits. The 450 engine is the way to go,,, just alot better to work with, and much more potential. Chad

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JaredM

11-09-2005 15:23:41




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 Re: making an M more powerfull in reply to ChadS, 11-08-2005 06:05:38  
Chad would stroking the engine also help or is it better for high gear pulling. What are good ways to increase torque other than the above. It seems to me that horsepower only counts in higher speed pulling. I have a friend that beat a H, that he thought to be running 70hp from sources, with a stock AC WD at a tug pull. I plan to do low gear pulling in both tug and transfer pulls. Thanks JaredM.

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ChadS

11-10-2005 07:52:21




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 Re: making an M more powerfull in reply to JaredM, 11-09-2005 15:23:41  
Bif Hp in tug pulling will bite you if your too light and unbalanced. In our deadweight club, the AC is the tractors to beat, no one can get close to them. I dunno, the torque and the balance is just perfect on em. I cannot compare the 2 types of pulling to each other,, there is different principles involved in deadweight pulling VS weight transfer. Deadweight pulling, is where the average everyday stocker can go in and whoop on the highest HP tractor,, usually the enhanced tractors dont do well, unless they are really weighted down to get the tires to bite. Ive got a 70 hp H, that just wont pull, Ive tried it light, and heavy, 2nd 3rd and 4th gear in deadweight, no matter what, It spins out. I have had it as light as 3300, and as heavy as 7500, but the torque was just too strong to plant the tires, even with 800lbs off the rear and some on the nose to bring the front back down to earth when the front initially rares up on take off, I took a stock Z moline, and beat the H everytime. Its the right combination of torque, and weight balance that makes a great deadweight puller, too much power will bite you in the rump. I have seen high HP M's in deadweight pulls do well, at 10000lbs, in 2nd and 3rd gear, I can tell you this,, he just idles it out,,, But the stockers with a good tune up beat him everytime. I dont belive that a combo deadweight/transfer tractor is possible without changing the hitch and setups too much to make one worn, and burned out very quickly. Its about easier to have 2 tractors set up for each style. You could have the high hp engine in transfer, and maybe seriously detune the engine to run deadweight to help hook, but, where does one start? The best M Ive seen in deadweight is 55 hp, anywhere from 5000-8500lbs, the power was just right, If a little more torque is needed to keep the engine going, look for stock parts that have heavier componets, like flywheels, etc etc,,, that helps along with a good tune up on the deadweighters,,, have you ever heard the phrase,,, a 2 cyl JD is the ultimate deadweight tractor??? Chad

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