If you time by ear to the middle of of rpm increase and rpm decrease you will always be over advanced on a higher compression engine. Detonation under load. With the old fuel burning, low comp engine, no big deal. Most fire cratered IH engines actually sound late with no load when timed properly. IH made 8, 16, 22, 25, 30 and 40 degree advance distributors in left hand rotation and all take different spring sets and shafts, same weights.
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Today's Featured Article - Experimental Tractors Article - by Danny Bowes (Dsl). Tractor technology appears to have nearly hit it's pinnacle of development. If you agreed with the subtitle, you are rather mistaken. Quite, actually. As a matter of fact, some of the technology experimented with over 40 years ago makes today's tractor technology seem absolutely stale by comparison. Experimentation, from the most complex assembly to the most simple and mundane component, is as an integral a part of any farm tractor's development
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