Horrible cold weather today, so no outside work. So, I made a setup for measuring combustion chamber volume, following Steve C's outline.
CD case cover, with two holes drilled for fill/vent.
First time i just used Vaseline - it leaked around plate once I got almost full
After a couple of attempts, I clamped the plate in place, using a little more Vaseline to seal.
Trying to completely fill & remove the smallest air bubble resulted in pressure between the cover & chamber, causing seepage
eDIT : next two pics are reverse order - the one with almost no bubble is the final
So, I did three tries following the same steps, shifting the head off level once over 3/4 full to aid in bleed off, and came up with 31.5ml, allowing approx -.2ml for spillage.
Piston pop up is .025", HG squished is .055-060" (variance is depending on where I measure)
New HG is .070" - 1.8mm
So, how so I compute overall chamber volume & clearance?
Seems like I may need a thicker HG - with only .035" (or less) approx that is .9mm - too tight?