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Author Topic: Videos of slow running M90 Hit & Miss Engines  (Read 301 times)

tony1951

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Re: Videos of slow running M90 Hit & Miss Engines
« on: October 24, 2020, 11:11:13 am »

Just wanted to point out, that the centered spring solution here, is way better engineering, than just removing one of the original springs.

Definitely that's right.  ;D

I might buy a selection of springs to try the impact of different ones. Sad to say, I lack both the equipment and the engineering skill to modify the piston, though I might try a thicker head gasket to make more space above the piston. As far as I can see, the only other variable that would affect is the exhaust push rod and there is a bit of latitude there to adjust that easily. The limiting factor is probably that just adding a ten or twenty thou head gasket would not make much difference to a 7cc engine.