Re: IH Battery Ignition (distrubtor)
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So just poking around TractorData...
The A & SA use the same engine specs, same bore & stroke, compression ratio and max RPM.
After that you move to the C123 in the 100 those few SAs with the c123. They all share the same bore & stroke, max RPM (1400 still) but the compression ration increases with each model. 100: 6.5:1, 130: 6.8:1, 140: 6.94:1. I'm guessing they did most of that with pistons & maybe head modifications.
So it kind of looks like anything off an A or SA would work no problems what so ever. If I wanted to rebuild the engine with 3 1/8" pistons a 100 distributor would be better, 3 1/8" stepped might even like the 140's setup, assuming they made changes in the advance between the 100 and 140. To check that I guess I would have to pour through the parts books.
I didn't look into the C/SC/200/230/240 line. With out looking I think they nursed a bite more HP out of those engines.
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