Normal Short/Long Term Fuel Trim on e85

[kcc0521]

Can anyone tell me what the long term and short term fuel trim be on a 2015 on motor running e85 flex fuel tune? I logged my car and I am curious how they look.

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[Dolsvt00]

Can anyone tell me what the long term and short term fuel trim be on a 2015 on motor running e85 flex fuel tune? I logged my car and I am curious how they look.

As close to 1 as possible on any fuel.

 

[Choking_Victim]

As close to 1 as possible on any fuel.

^this..someone else care to confirm.

 

[BamaSupport]

^^this I do believe they are disabled on flex tunes..someone else care to confirm.

We do not turn off learning or Long term trims/adaptive with E85 or the flex fuel tunes we are close to releasing.

As close to 1.00 as possible is ideal...but check a factory tune and prepared to :frusty::frusty::frusty:

 

[kcc0521]

My long and short term trim were 1.04-1.05 through the whole run. If they are turned off how does the car manage the AFR and what parameters do I data log to check the AFR? I really appreciate all the help and I am just trying to understand what the car is doing to determine if the tune is safe.

 

[Choking_Victim]

We do not turn off learning or Long term trims/adaptive with E85 or the flex fuel tunes we are close to releasing.

As close to 1.00 as possible is ideal...but check a factory tune and prepared to :frusty::frusty::frusty:

I misposted in my previous reply, what I meant to say was wouldn't you wanna log your non flex tune to ensure the STFT/LTFT with pure pump to get an accurate portrait of how your airflow model is tuned? To ensure the accuracy of the inferred alky % while on a flex tune? I had read some data point on this in an earlier thread....food for thought.

 

[Choking_Victim]

http://www.mustang6g.com/forums/showthread.php?t=39294&page=76

Start at post #1130 and read a page or 2 for a better explanation of what I was saying.

 

[kcc0521]

That really cleared things up a bit. It appears that lund set me Lambda at .85 and it is hovering right around that during the whole 1/4 mile pass. Thanks for all the advice.

 

[Choking_Victim]

That really cleared things up a bit. It appears that lund set me Lambda at .85 and it is hovering right around that during the whole 1/4 mile pass. Thanks for all the advice.

.85 is a good place at WOT..I too am lund FF tuned..enjoy glad to help.

 

[kcc0521]

At times I think about trying to tune my own car with HP tuners but I am not sure I have time to mess with it.

 

[Dolsvt00]

Just for the sake of saying it, ltft shows learned fueling, stft shows current correction. If your wot, stft will show commanded fuel, but not accurate wot fuel you need lamb for that.

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