Altitude and Boost Consideration

[Hondata]

Make a longer datalog and then graph the afm.v vs long term trim. Then adjust the AFM table values based on the voltage.

[carlitos1206]

Make a longer datalog and then graph the afm.v vs long term trim. Then adjust the AFM table values based on the voltage.

Hi!!

Thank you for your reply!!

I did a longer datalog and created the chart afm vs long and short term trim

Trims.PNG

I have a question regarding AFM adjustment:

My understanding is that during WOT, above 4volt is the concern area where the A/F is oscilating so I thought I should adjust above 4v

But based on your comment, using long term it seems that the adjustment must be done below 2volt area (which really doesnt make sense to me at this moment)

My understanding is that if fuel trim is positive it means PCM is compensating lean condition by adding fuel (negative the other way around) ... if Im increasing boost and intake is different from OEM (I am using Mishimoto intake) ... I should compensate based on that, right??? but if I use long term, seems opposite

Sorry, seems like my understanding is incorrect and I would like to clarify your comment

Thank you for your time

[Hondata]

With the FK2/FK8 long term trim is stored by rpm, so that might be why you see some differences with voltage.