Quote:
Originally Posted by GeneBob
When you say "runs cooler", I assume you mean than it did before.
The higher compression head improves the efficiency of the engine some so less fuel goes to waste heat and more goes into useful power. The other common cause of unintended engine heat is running too retarded on the spark. You may be finding a better spark advance point now because you are paying attention to it more.
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GeneBob
You are right that I am paying more attention to it. With the stock head I ran 1/2 advance and bumped it a few clicks down when I went over 40 and just above full spark advance between 45 and 50. The weather was 10 to 15 degrees cooler and my Motometer would be between 1/3 to 1/2. Now its showing 1/8 maybe a tad bit more but not much at all.
Ron