Quote:
Originally posted by oab_au
>combustion chamber volume (*not* including gasket and cylinder volume):
3.453cu/in (8.77cu/cm) <
cyl.vol + combustion vol / combustion vol = compression ratio.
550cc + 8.77 / 8.77 = 63.7:1????
550cc + 60cc / 60cc = 10.1:1
I reckon, the combustion chamber vol with head gasket, would have to be around 60cc, or did I read you wrong.
Keep at it, "seek and you shall find"
Harvey.
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Somewhere my math is hosed for the chamber vol. For the cylinder vol, I got 554.237cc, giving a total of 3325.423cc, but lemmie check something...
<LATER THAT SAME MORNING...>
FOUND IT!!!
I have metric *and* standard values for each measurement. My x-lation for combustion chamber vol from metric to standard was WRONG!!
When I input the metric value, the 8.7cc got (incorrectly) translated to 3.453 cubes, and I used the *wrongly x-lated standard column* as the basis for the compression ratio calculation! Had I been paying attention, I would have noticed that the ratios for the standard and metric value columns were DIFFERENT!! AAAAGGGHHH....
Ok, short answer, I got a combustion chamber + gasket vol of 60.89cc's for a mechanical compression ratio of 10.102:1 (61.54 for a 10.006:1). It's sad, but I can't remember if the shop manual quoted 10.1:1 or 10:1 for the c/r.
Sorry bout' that guys...
