[quote="LJD"](quoted from post at 16:51:32 12/14/12) Nonsense. Show us one engine that came as gas and diesel and the diesel has more torque at lower RPM (with equal aspiration) I can show you many that do NOT.
Long stroke is what makes torque. Just like putting a piece of pipe on a wrench handle. Just so happens that most engines now adays with long strokes are diesels. Gas engines usually have shorter strokes to make higher RPMs.
One example of many:
Deere three cylinder engines with equal bore and stroke (except 135 gas has shorter stroke):
Long stroke and small bore and short stroke with a large bore , with the cubic inches being the same. Doesn't make beans for difference in torque and power.
The small bore engine just doesn't have the room for large valves so it can breath at high rpms like the large bore engine.
Old tractor engines tended to be tall a narrow to fit the chassis so hence the long stroke, small bore engines where small valves and small ports . Would keep airflow velocity high and assist with low rpm cylinder filling.
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 - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[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.
