I pulled my engine last week and need to replace or repair the existing round, double stack mag ring on my '14 Touring. I see that there were other kinds available later on (oval, single stack). Is there a benefit to switching from what I currently have to a later style?
Bill, Joe can answer that question!
Yup,Between Joe and Wally i have a very hot mag!! Bud.
If your engine is older than September 14, 1914 or engine # about 578,000, then you'll get some more power from the magneto with the newer style 3/4" magnets and coils that were upgraded for the upcoming electric headlamps.
Yes, Roger, my engine was cast March of 1914 so I'm thinking the later, 3/4" magnets may be better.
It's not the magnets that are the issue. The oval shaped field coils are a huge improvement over the round ones. Single or double stack makes no difference. There is a "dead spot" between each of the advance selections on early cars that makes the spark lever position really critical. These dead spots are wider than the "sweet spots" where the voltage output is much higher.
Of course you will need to use thicker magnets with the later oval field coil.
Ken, you talk about a hot mag!...the one Joe put in "Pete", my '12 is definitely hotter than a firecracker. It even surprised him while it started on mag, ice cold engine, while he was priming it for it's very first test run after being rebuilt. Even with my arthritic shoulders I can "cold start" him on mag, as I did yesterday with it sitting in 55 degree cool weather. I was impressed, albeit with sore shoulders!
Tim,Joe asked me if i wanted a hotter mag and told me he would get a better coil ring from wally and it works very well.I can't say how many years it's been but i haven't even cleaned the Anderson timer.I think Royce has the right idea as to why!!Bud.