anybody know how to use them? i have corky bell's book (maximum boost) and when i use the map he shows for an example and plot the X and Y i do NOT come up with the same point he does.
if you have the book, the example is on page 29 and the map is on page 30. it says to plot 743 cfm and 1.82 pressure ratio. that's supposed to fall on the 67% line. my plotting gives me about 63%. (just a guess cuz it falls outside the 65% line which is the last one). is the map wrong, a typo on his part, or am i just a retard?