IH fan said: (quoted from post at 16:54:24 12/02/12)
Go to the Nebraska tests and look at the drawbar bull as compared to the drawbar HP... there seems to be no direct correlation. I believe the pull weight means more than the Hp rating. I imagine the pull weight takes into consideration the weight, gear ratios and maybe other things. Ford tractors were geared pretty high and with a 4 speed, ratios were spread more. IH Ms and Hs had a 5 speed, JD B, A and Gs and Olivers had 6 speeds ... these things all entered into how they pulled, as well as the torque rating.[/quote:51dcee83d3]
Horsepower is the product of the actual force the tractor is exerting on the drawbar times the speed in which it is being pulled. A tractor can actually pull a greater load at a lower speed and produce less horsepower than if it pulled a smaller load at a faster speed.
For example, in tractor test #328 the Farmall M gas tractor produced a 100% maximum drawbar horsepower of 33.05 while exerting a drawbar pull of 4060 pounds and traveling 3.05 mph. Yet it produced a maximum 4233 lbs. pull on the drawbar while traveling 2.17 mph and produced 24.49 horespower.
[quote:51dcee83d3="mattwillson"](quoted from post at 19:25:12 12/02/12) my M dyno'd 42 hp last summer at SWOSTA. this year, with the turbo, it should touch 80+.
248ci, pretty much worn out. 1950 model yr
Do you know for sure your engine is 248ci? Reason I ask is because the M engine came from the IHC factory with a 3.875" bore and cast iron pistons. Most Ms have since been rebuilt with thinner sleeves and 4" aluminum pistons which will give an increase in horsepower. As a matter of fact, ALL new piston/sleeve kits made for the Farmall M today will have 4" aluminum pistons. Also, a lot of the 4" pistons are domed to increase compression and that will increase horsepower too. So, with the 4" pistons you have 264 CID and essentially a Super M engine.
This post was edited by Nebraska Kirk at 17:49:30 12/02/12.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
