Interesting info Professor,,,,,I have seen both the wire itself and the illustrations of the helical/spiral wound wire used to reduce RF interference, they look expensive but dont have the high carbon resistance of just cheaper carbon core wires. AS the plug gap widens and/or resistance increases it takes a higher voltage to arc jump the plug gap but theres always engineering trade offs. Theres only finite X amount of energy stored in the coil during the current conduction phase which gets expended into heat losses and V x I x Time when the field collapses to raise the Secondary voltage to fire the plug. Therefore, if you widen the gap (or I guess add resistance) which necessarily increases the voltage rise before current arc jumps the plug gap, either the current and/or the arc duration time must decrease.
Looks like all agree carbon core wires are NOT favored for old tractor magneto ignitions but the theory gets a bit complex, maybe more then I spoke of......
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 - Good As New - by Bill Goodwin. In the summer of 1995, my father, Russ Goodwin, and I acquired the 1945 Farmall B that my grandfather used as an overseer on a farm in Waynesboro, Georgia. After my grandfather’s death in 1955, J.P. Rollins, son of the landowner, used the tractor. In the winter 1985, while in his possession the engine block cracked and was unrepairable. He had told my father
... [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.