I have an FJO WB and have it's 5v output linked to my ext1 in. To calibrate the FJO, I disconnected the FJO from the EFI unit and, with the engine off, I checked the voltage output of the FJO with a DVM (4.56v) steady. I then plugged into the EFI unit and checked the EXT.AD1 voltage (4.38v) average. There was a noticable delta between the two voltages (0.18v). I then added the "dropped" voltage to the "calibrated FJO" PID I made. Below are the details and the attached logs are from me cruising at 65mpg on the way to the track, and the other from a WOT 1st to 3rd run down the track.
So, did I calibrate correctly?
Should I trust my calibrated CAFR PID over the default FJO PID?
DVM 4.56V
EFI 4.38V
Delta 0.18V
Default FJO Calculation afr=v*2.5+8.75
My Adjustment Calculation afr=(v+0.18v)*2.5+8.75