How much milled off heads to raise compression

toolmanmike said

And I thought you were a smart guy. Run on or dieseling can be caused by hot spots like detonation happens but not by low octane gas. Your idle can be too high causing it to diesel. What are "anti dieseling solenoids" for? How about detonation sensors on newer engines that retard the timing to prevent engine ping?

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Not smart just handsome! LOL...
At 11 to 1 I went all over the place with adjusting carbs timing different carbs different adjustments different heads different head gaskets and so forth... I do idle just a tad higher than most as I really don't like it chopping really hard.. one inevitable factor always seems to work and that's adding just a tidbit of octane and zero problems. not that I have any serious problems when I don't use a little octane of course I can always shut it off against the clutch a little bit but I just prefer my engine to shut down nice and quick on its own... The aluminum heads didn't solve the problem... I bought a bottle of torco fuel octane booster and we're going to give that a little whirl this summer.. it just needs the slightest bit of octane boost to make the run-on problem go away. Right now I had maybe one gallon to a tank full and no problems. Again no big problems here just a little run on without some octane. Af gauge reads perfect at idle cruise and full throttle and plugs look pretty good...