To the above I would repeat - torque is not determined by stroke! Maximum torque occurs at the RPM (for any stroke) at which the cylinder, most completely fills with air/fuel mixture. The engine designer determines the RPM point by port sizing, valve sizing, cam timing etc.
To the above I would add - long stroke engines have a smaller bore size for a given displacement. This is useful for heavy duty engines as it makes for a shorter crankshaft; a shorter crankshaft is stronger. In addtion the smaller pistons generate less force reducing bearing loads for a given torque level.
In applications where higher horse power and lighter weight is desired a larger bore is typically used because it allows for operation at higher RPM as explained in buickanddeere's post above.
As far as engine speed goes; crankshaft RPM is well understood. However, there is also piston speed to consider; average piston speed is given by; Piston Speed (ft/minute) = 0.166 x Stroke (inches) x RPM. Some of the long stroke engines we like to think are slow speed are really moving on the inside.
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 - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
... [Read Article]
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.
