|
Tractor Talk Discussion Board |
Re: Re: M motors
[ View Follow Ups ] [ Post Followup ] [ Return to Forum ]
Posted by G-MAN on September 19, 2002 at 16:38:38 from (206.106.139.74):
In Reply to: Re: M motors posted by Steven@nd on September 18, 2002 at 16:49:36:
I'm not trying to start problems here, but I'm having some trouble with your math. The formula for horsepower is as follows: HP = (Torque x RPM) / 5252. A couple different sources I referenced show rated speed for the Farmall M to be 1450 rpm. According to my calculations using the formula listed above, a Farmall M would have to produce 97 horsepower at 1450 rpm to have 350 lb. ft. of torque at that RPM. I calculated that as follows - 350 ft.lb. x 1450 RPM = 507,500. 507,500 / 5252 = 96.62 HP. Using a HP level of 45 at 1450 RPM (although the Nebraska test results I saw showed around 36 HP on gasoline) torque would be 163 lb.ft., or less than half of the claimed 350. I calculated this by the following formula: HP x 5252 / 1450. I have dynoed dozens of tractors, and I can tell you first hand that as you continue to pull a tractor down past rated speed, horsepower and therefore torque will continue to increase. But, according to my math, an M would have to produce 45 HP at a scant 675 RPM to be producing 350 lb.ft. of torque. A John Deere "G" with 412.5 cubic inches and a monster stroke of 7 inches only produces 204 lb.ft. of torque at 975 RPM (according to the Nebraska test HP rating), so if you have or know of a stock Farmall M that can produce 350 at 675, I am extremely interested in purchasing it. Even a die-hard Deere man such as myself can see that such a tractor would be a force to be reckoned with in stock pulls. Once again, none of this is intended to start some big color war, but I find engine-related math to be interesting, and something didn't look quite right in your post. Feel free to correct any errors that I may have made.
Follow Ups:
Home
| Forums
Today's Featured Article -
Product Review: Black Tire Paint - by Staff. I have been fortunate in that two of my tractors have had rear tires that were in great shape when I bought the tractor. My model "H" even had the old style fronts with plenty of tread. My "L" fronts were mismatched Sears Guardsman snow tires, which I promptly tossed. Well, although these tires were in good shape as far as tread was concerned, they looked real sad. All were flat, but new tubes fixed that. In addition to years and years of scuffing and fading, they had paint splattered on
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
Copyright © 1997-2024 Yesterday's Tractor Co.
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. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|
