Posted by Janicholson on January 09, 2019 at 06:44:55 from (199.17.6.91):
In Reply to: Farmall m heads posted by tbaumer24 on January 09, 2019 at 05:54:10:
My opinion is that your decision must not depend on us, but on actual "measured" compression. A slow turning (even if it is cranking 2300) engine requires spark advance evaluation and spark knock assessment to get it dialed so it is at the edge of knock under full load. People have taken off .100" and made it work. Core shift and production variability could hit water jacket at that cut on some heads. Has it been trued before? how does one accurately determine the depth it has been cut to date. CCing the chambers is a start, then looking at piston clearance to the Chamber edge. Some grinding is probable. Valve to piston clearance is to be considered, especially if modified rocker ratios are used, or a custom cam. Pump gas includes 93 R+M ethanol premium. Good luck. Remember it has 3 main bearings. Jim
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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