Ok, let's say I had a NOS magneto from an older T. Is it not identical to a starter era magneto except for the knotch? Couldn't I cut or grind the starter knotch into the older magneto and have one that would work just fine? Anybody ever done this?
I have never personally done this but I know several people who "claim" to have done just that. I have no reason to doubt them but cannot give you any more info than that. Just be careful NOT to wound the winding.
If you do, you might have to then wind the wounding
I beleive I would find someone that wanted a nos old style and swap.
I have done this once. I used a die grinder with a carbide cutter. Just need to take your time and be careful. Be sure you have another to use for comparison.
Thanks everybody, I might try it once to see how it goes.
What no one has said is; there are different mag coil rings and there are different magnets.
(First 17,500 cars)
Magneto coil had double-stack round coils mounted on a pressed-steel ring. The ring had holes of about the same diameter as the coils, located just inside the coils. The magnets were of an elaborate forged design, 1/2” thick.
Coil is similar to the earlier type but no longer has the holes in the pressed-steel mounting ring. Magnets are similar to the earlier type but now 9/16” thick.
At #20,501 The magneto was redesigned. The coil ring is now a casting and again has the holes near the coils. The coils are still double-stacked. The magnets are of the simple bent type and are now 5/8” thick.
At #572,437 the magneto was again redesigned to accommodate magnets of 3/4” thickness. The coils are now oval-shaped, still double-stacked.
The coils are now single-stack but otherwise similar to the above.
Similar to the 1918 type but the ring now has a notch to clear the starter shaft.
Coil modified to now use 3/16” wide copper windings instead of the 1/4” used earlier
Barrowed fron the online Encylopedia
Good to know. The NOS magneto I got is a '17-'18. So, that makes it single stacked and 1/4" wide windings. My engine and transmission are a '25. I would think the only thing effected by the wider windings setting the gap. Is this true?
Gap setting is the same. 1/4 and 3/16 mag rings are basically interchangeable.
So, it should work then right?
One of my 1926 engines had the notch cut in the Mag Coil Frame. That is not a problem, if you can grind the notch and avoid tearing the coil covering.
A 1926 Mag Field Coil Ring will work on a 1911 engine, with a 1926 Flywheel and Magnets and a 1926 starter style transmission cover to match. Seems like the 1911 originally had a double stack coil ring and thinner magnets.