Whew, That mag is decidedly bizarre inside. My thoughts were just to get an operational spark, but I guess not on that unit. As to the polarity of spark. I agree the only small advantage to a center to ground spark is the thermionic effect of a hotter point of origin. The plasma between the electrodes just needs to start a good fire. Several years ago an extreme test was made with consumable electrode high current Capacitive discharge. (I have no idea where it was published) This experiment used currents of 20 to 100 times those found in normal spark ignitions. It actually produced a flash of superheated gas into the chamber (test cylinder) that produced a significant improvement in combustion rate and flame travel due to a larger flash origin for ignition. The peak mean effective pressure was greater, and power was incrementally increased. It was determined that the cost of consumable electrodes, and the complexity coupled with metal being "eroded" off of the tips, was not a viable solution. CDI and other hot spark electronic igniters and coils pumping into wider spark gaps (some at .080") are a reflection of the value of the idea. Exotic metals and heat control are also in the same realm of applied science. Fun discussion. His rebuilt mag looks great. I hope it performs. JimN
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 - A Farmall Story - by Ed Meadors. The year was 1978. Our young family had recently moved to rural Chesapeake, Virginia to a plot of land which would finally allow us to realize our dreams of a huge garden, critters and more lawn and pasture than we would ever use! We needed a TRACTOR; not a riding mower or tractor wannabe, but a real TRACTOR. The answer to our needs materialized in the form of a '44 Farmall A, complete with cultivators, discs, single plow, a 5ft.Woods belly mower and one, mounted spare 9.00x24 rear wheel.
... [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.