That seems a little high. My subaru forrester is at .37
In the g-tech manual it has instructions on how to figure it out by decelerating from 60 to 50... I have not tried it out.
At worst use what they have listed as a honda civic. The difference will not be dramatic.
I use my mind to benchmark and test my add-ons so once you don't change the settings you can gauge increase/decrease rather than overall performance.
E-mail me I live in SoCal.