Columbus compression test method

[4x4x4byfar]

Can anyone explain what and how the Columbus compression ratio/capacity testing method is/works.

Google does not seem to recognize it (well for me it won't)

Cheers

[Crash bandicoot]

you mean the ability to calculate compression ratio based on engine capacity piston type, cylinder's etc etc?

[4x4x4byfar]

Question is, is the Columbus method just the term used to do the test (using information as above) or is it a particular type of test?