[pianotech] measuring action ratios

[Ed Foote]

In a nutshell:
 Lower ratios will accommodate heavier strikeweights but will regulate 
with longer dip and blow (or both).
 Higher ratios will require lower strikeweights and will regulate with 
shorter dip and blow (or both). 
 

Greetings,
    To my terminology, the lower ratio will regulate with deeper dip 
and/or shorter blow,
The high ratio will often call for the shorter dip and/or longer blow. 
 

Ed Foote RPT
http://www.piano-tuners.org/edfoote/well_tempered_piano.html