In article ,
Chris Bacon wrote:
I absolutely do not know why. IIRC someone said that "the thickness of
the head gasket influences compression ratio" or words to that effect,
& I said that might be true for *some* engine designs...

It's certainly true with conventional engines - it alters the volume of
the combustion chamber and therefore the compression ratio. (The volume
swept by the piston stroke remains unchanged)

It's rather like having a warped head skimmed true. This also alters the
compression ratio.

--
*Why don't sheep shrink when it rains?

Dave Plowman London SW
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