File talk:K04-0025.jpg

can anyone teach me how to read the map?
 * Click here --Nyet 03:12, 12 August 2006 (PDT)

I know how to get the Y-axis, boost in bar+ambient pressure/14.7-1(assume pressure drop), but for x-axis how do i get that 0.1 to 0.15 number? JD said say 450hp/3000=0.15 thats what i need to look at?