Understanding the 91+ Octane tune

[redxnemesis]

So would switching between the 3.5 throttle body vs the 3.7 throttle body have an impact on the tune or will the 91+ octane tune already have that mapped to 14.7:1???

Would a "wideband o2" sensor improve anything?

Does the tune disengage the VCM?

I noticed she runs at 14.7 without the fuel trim engaging at all. Does this mean the "ECU relearn" is disengaged?

Thanks for your time

[KTuner]

Switching throttle bodies can affect idle.

The car has widebands already.

[redxnemesis]

Thank you that makes sense, I will have to look into MAF mapping after this.

If I wanted the AFR to be 13.1 during high load Closed loop and open loop, would this be the right change?
See screenshot.
https://drive.google.com/file/d/1_DyjtN ... share_link

[KTuner]

MAF should only need to be scaled for a MAF housing change or change in flow dynamics with aftermarket intake piping.

WOT Enrichment targets control wide open targets.

[redxnemesis]

That's what is under "engagement settings" on the closed loop settings? I see it is also 14.7

[KTuner]

No, see the WOT Enrichment tables in your table list.

[redxnemesis]

Thank you,
If I were to put on a ZDX 3.25" Throttle body and a 4" intake, how would I go about modifying the MAF map to adjust the intake voltage under the 91 octane tune?

[KTuner]

While we can't teach you how to tune, many would make use of the fuel trims in that scenario.

[redxnemesis]

Yes I was thinking about tuning the MAF scaling for a bigger housing and loading that map onto the 91 octane version.