I have a 3.5 setup without an Aeroforce, currently.
I had one, until it broke and do not have the funding in the mean time.
Here is what I do. I bought the Torque app, and Torque OBDII connector, and scan for KR with that for the mean time. It is quite accurate, and will give you very good idea what KR you are seeing. All for roughly $30.
I scanned my car with Torque so many times. In cold weather, in warm weather, 0-60 pulls, 60-120, 40-80, blah blah blah and see what kind of KR I was getting in all ranges. I never see more than 2*
So now that I know what KR I am getting, I don't turn my torque app on everytime I drive.
I do not recommend never getting an Aeroforce. But in the mean time, while you slowly save up some pennies for it, just do what I do, or something along those lines.
