Originally Posted by seagull
Instead of starting a new post I am reviving this one since it has some good information on calibrating the K-factor.
On my Dynon I show;
PUL/GAL (C37 P14) 100000
PUL/GAL (C37 P19) 100000
Are both of these numbers important or only one?
C37 P14 refers to the EMS 37 pin connector and P14 is the red cube flow from the fuel tank.
C37 P19 is for return flow, but the RV12 has no return flow transducer so there is no connection to that pin. You can confirm that on the Van's SV wiring diagram if you wish. I am not to sure what SV does with the number you might put into the P19 setting.
It does appear though that if there are no transducer pulses on pin 19, then there should be no effect on fuel flow no matter what "K-factor" number you put in the settings for Pin 19.
Things might work differently on the D180 because as I remember a few of us using that EFIS could simulate return flow using the return flow K-factor. We were able to set indicated fuel flow on the EMS page to zero with the engine off and the fuel pump running. We resorted to that because the D180 limited the top adjustment of the red cube K-factor to 99,999 and we needed it to be higher. By adjusting the return flow K-factor we could use a number less than 99,999. This is all from memory a long time ago I no longer have a D180 panel so can't verify that.
I hope I have not strayed to far afield for this thread.