Re: Farmall H Advanced Timing

Posted by Janicholson on October 04, 2010 at 17:21:43 from (67.72.98.45):

In Reply to: Farmall H Advanced Timing posted by Shawn in PA on October 04, 2010 at 16:13:22:

Timing curves are designed to put a spark into the cylinder at just the instant that causes the flame front from the burning fuel (it does not explode)to reach full cylinder pressure at about 4 to 8 degrees after TDC. If it is too early, the pressure causes detonation as there is no where for the pressure to go. If late, the piston is too far down and speeding up such that the fuel has less to do. Chancing the springs may have changed this position in a way that makes less power for your fuel/work/RPM. I would make sure the timing is at TDC static, then check it with a light. to assess the point of full advance. I would guess it is at 1300RPM (but do not know the spec.). Try the old springs if it is timed at TDC static. Adjust it if it is not at TDC static. Jim

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