Posted by MarkB_MI on November 14, 2009 at 04:03:02 from (32.178.19.112):
In Reply to: Horse power??? posted by dave2 on November 14, 2009 at 00:09:53:
The transmission must be able to handle the engine torque, not necessarily the horsepower. Power equals torque times RPM. Now you can't increase horsepower by changing the gearing, because you won't have more horsepower than what you started out with: As you increase the torque through transmission gearing you reduce the RPM and horsepower stays the same (minus friction loss).
HOWEVER, tractors are normally rated at the PTO at 540 RPM. So, if you have two tractors that have the identical engine, and tractor A produces 540 PTO RPM at 2300 engine RPM, and tractor B produces 540 PTO RPM at 2100 engine RPM, tractor A will have a higher PTO horsepower rating than tractor B. Even though the engines are identical, tractor A produces greater PTO horsepower at the rated rpm.
Another thing to consider is that it doesn't take much of a modification for an engine to generate a bit more horsepower. Different carburetors or injectors, different cam timing, compression ratio or governor settings can be used to squeeze a bit more power out of an engine. Back in my yachting days, I owned a 120 HP Evinrude outboard motor. Looking through the parts breakdown, I found that the only difference between the 120 and 140 horsepower motors was the carburetor bodies. Of course, OMC charges several hundred dollars more for the 140 HP motor, even though it doesn't cost them a nickel more to produce than the 120.
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 - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
... [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]
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.
