it was by 1byte load. than I will check with 2byte baro temp corrected

with the temperature get colder but the boost didnt change it is normal to log more load with 1byte ? Like it was 270 afternoon than at night get colder and logging 285-290 with same 26-26.3 psi boost ?

 

I check my log where I have Airflow Hz. in the stock rom from 1587hz will change from ltft mid to high which is ~ 5000rpm where my issue lets start . maybe this coud be the problem. I will try to "turn of" the mid and lets see what is up.

 

Turn off lean spool. Dont mess with the LT fuel trim settings.

 

but it is off. i hate lean spool.

 

Well dont mess with the LT fuel trim settings.

It doesnt matter if you have to increase numbers in the higher RPM to make it not rich. the number in the fuel map is just a number.

 

than I will leave it maybe smooth out the fuel map a bit.

Only suggest to leave the fuel trim settings because the Ecu has the possibility to compensate on boost leak temp and baro change by the fuel trim ? Or does it have other reason too ?

 

There's nothing wrong with changing the LTFT Mid to high crossover Hz to a lower number. It was meant for a stock car so that the LTFT Mid would be applied to WOT. Since we are mostly over 1600Hz anyway when we start modding, and if you want consistent AFR without the jump in your map, you can change the crossover point.

 

By semi popular demand and request I'm posting some close ballpark numbers

RC/PTE 1200's

Scaling-636-880 e85/91

Volts MS
4.69 4.512
7.03 3.4
9.38 1.6
11.72 1.0
14.06 .744
16.41 .576
18.68 .480

These numbers will get you close and if you enter 1.6 for 9.38v Ecuflash will add the digits out the thousandths automatically.

Please remember each set of injectors are different even from the same brand. If you try these let me know how they work others have reported

 

did someone play with maf scaling after injector scaling ? my fuel trims are ok, but the map afr is so far from the wbo2 afr. suggest to play with maf scaling ?

 

Question.

If my LTFT Low is around +1 and the LTFT Mid is around -4, what should I do to get the Mid trims closer to 0? Raise the injector scaling number?

 

Yes and be prepared to make 14v latency higher number as odds are it will jump from +1 to +2 or greater depending on how much more you raise your Global number

Good Luck

 

You're talking about getting your real afr's closer to your fuel map afr's? I've heard people tuning their injectors by basically choosing an injector scaling, comparing the 2 AFR values, and then trying to get them as close as possible by adjusting injector scaling....then getting trims in check with latency, but never have I heard MAF scaling get used. I do know if you want to run really rich when using a "base lancer" rom in the upper RPMS, you just increase MAF scaling for that airflow. That's basically a bandaid for people who can't get rich enough...but I think for an evo, it should match the MAF adaptor, no reason to adjust it. It's like, calibrated for that exact scaling, if you change it, that's just one more thing that gets thrown off.

I say just stomach the difference, they are just numbers in the AFRMap after all, no real comparison between the 2...just knowing as one goes up, the other will too...

 

Yes I would getting my real afr's closer to the fuel map afr's . I scaled my injectors how it shoud by the help of fuel trims, they are as close to zero as it coud be. Leans spool up and fuel trims control turn of.
Than I read in the Merlins book page #75 how to get the map afr closer to the wbo2 after injector scaling : On wastegate pressure set the fuel map above load 120 to 11.5 turn of lean spool and log @ wot wbo2 afr, load, and AirflowHz, and where the logged wbo2 afr is different more than 0.2 from the map 11.5 afr there change the maf scaling by logged the Airflow hz with the different in % .

Here is log from 2 car, the wbo2 afr are ok and always the same but exspecially in the Evo 9 the map afr is so far from the wbo2.

EVO 9 PTE 780cc



EVO 8 FIC 1050

 

anyway i am ok with the result just wondering why does it looks like this.

 

Because the AFR MAP is only a visual representation of AFR. It is not what the AFR actually is...