I bought a TechEdge wideband lambda meter. The AFR stays at 14.5 at idle and cruise. At WOT acceleration the AFR is around 11.5 - 13 and then gets back to 14.5 at constant speed. So the KE-Jetronic mixture formation seems to be working great.

What would be a good value for AFR for a NA engine and a turbo engine in closed loop operation? The wideband meter has a narrowband output to the ECU and I can program it to give almost any AFR in closed loop. I think I must change the basic CO and/or EHA mixture accordingly. Do the EHA basic setting (the adjustment screw inside the EHA) and the CO setting (idle mixture screw) affect the whole mixture scale from lean (or stoichiometric) to rich mixtures in the same manner or is there some principal difference between these settings?

tomant