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Old 05-02-2003, 10:31 PM
tazz311311 tazz311311 is offline
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units of compression ratio?

does anyone know the units of compression ratio? What is it the ratio of? I was thinking it might be the amount of air per amount of gas that can be squeezed into a cylinder but im not sure.
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Old 05-02-2003, 11:12 PM
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ales ales is offline
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Compression ratio isn't measured in any units This is why it is called a "ratio" - something divided by something.

read up here

And a little quote from the page:

Quote:
"Compression ratio if defined quite simply as the volume above the piston at bottom-dead-center (BDC), divided by the volume above the piston at top-dead-center (TDC)."
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Old 05-03-2003, 02:34 AM
911GT2 911GT2 is offline
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Yeah, a ratio like this (volume over volume) is inherently unitless.
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