The effect of installing a larger maf question for Decipha

[Juice]

Michael, this had been bugging me for many years, maybe you can explain why! Please keep it a simple as possible, I'm no programmer. lol

The Scenario: installing a larger maf housing onto a perfectly tuned engine, and updating the new maf transfer data only in the tune for the larger housing, the load gets skewed. And we all know higher load means less timing, more fuel, etc.

What I'm trying to understand is WHY this happens. (I have observed this on both my 91 and my 13 coyote). My gut feeling tells me that the eec does infact use Mafv or Maf period to calculate load in addition to the measured air.

Ps:I'm not looking for free advice here on how to 'properly install a larger maf'. Just trying to understand what the eec is doing in the background.

Bonus question: why does my 13 coyote complain about a non-existent O2 sensor 3, bank 4? This does not throw the light, I just see this failure under "test results" in Torque.

[decipha]

no it doesnt

simply changing the maf and dialing it in changes nothing

you observed wrong

no, maf period or voltage has no bearing on anything

either your torque app is wrong or your hego_config for the rear o2s is set to an improper value