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Tractor Talk Discussion Forum

farmall m

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1965LONEWOLF

08-20-2007 11:20:20




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so what do you guys think ? i run a 18.4x38 tires on 18 inch rims , seems to do good on the tranfer sled pulls but i don"t know about dead weight pulling yet ? seems if i try 1 or 2 nd gear they will spin out in the pull off , so what the genaral say on wide rims vs skinner rims , and low tire pressure vs high pressure ?
power is not a question - i got that




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Dairy Farmer in WI

08-20-2007 19:07:16




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 Re: farmall m in reply to 1965LONEWOLF, 08-20-2007 11:20:20  
well if you have that much lug i would suggest leaving them hard. but don't get all hot and pull fast. fastest with an M that i go is 2nd. then you have good traction, lotsa power, and a bit of momentum mix all together to make a good pull. i pull an M quite often but i bet it don't ahve as much power as yours has but just remember to use your head , not you checkbook.

my 2 cents

DF in WI

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Bob Kerr

08-20-2007 17:30:17




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 Re: farmall m in reply to 1965LONEWOLF, 08-20-2007 11:20:20  
I don"t know much about pulling or pulling tires, but I have done a lot of work getting a 68 GTO to hook up on the street with plain old street tires without a smokeshow and I have a feeling both are pretty close to the same. If the tread compounds are the same (and no sticky cheater tires)I found out there is a sweet spot that has to do with tire width and weight of the car on the rear axel both at rest and at full throttle. Since GM already did the tire pressure work (the pressure rating on the sticker in the door or glovebox and not on tire puts the tire downforce the same all the way across the tread) I put on several different size tires from wide to skinny.The worst tires I tested were wide L60s and the best were E78s and the second worse were the eagle ST 225/70s simillar to the G70, that I had on the car. the skinny E tires did much better and it was because of the lbs per square inch downforce on the tread patch. smaller tread patch, more lbs per square inch and more friction between tire and road.I could floor that car from a dead stop and it would barely squeal them and dang near pull the front tires off the ground! My buddies who I borrowed all the tires from all had their jaws on the ground. We put those skinny tires on for fun and had no idea they would hook better than the wide ones. I do not know for sure if that applys to dirt or pulling but I bet it does or is close! I do know an easy way to check tread patch on a tractor is to drive it on a limestone road and then go down a nice flat blacktop road and watch where the rock dust wears off. if the dust comes off in the center of tire only, let out some air till you have it where you want it. on the car or truck I use a crayon mark all the way across the tread too check it. I may be way off as to pulling on dirt, but heck, if it works you might leave them scratching thier heads.

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Dairy Farmer in WI

08-20-2007 11:32:56




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 Re: farmall m in reply to 1965LONEWOLF, 08-20-2007 11:20:20  
as far as tire pressure goes, it al depends on how much lug the tire has. if it has say 40% or better you want more pressure to keep your lugs hard so they don't fold over on you. 40% or lower i would think you would want a bigger print to have more lug on the ground since you have less lug. i could be wrong but that's what i know from experiance.

DF in WI



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1965LONEWOLF

08-20-2007 13:06:11




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 Re: farmall m in reply to Dairy Farmer in WI, 08-20-2007 11:32:56  
they are firestone 151 's , with about a 1 1/4 lug with a nice road worn back to them , just trying to figure out if i would hook better with low pressure or keep them hard and don't loose drawbar hieght ? i have plenty of motor , thats all been reworked



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