NefMoto

I have tried to make my car run better mpg reading for a while without success.
Tried advanced timing, change kfmirl and kfmiop maps back anf forth, chanced kfldimx and other little mods read from this forum.
No luck so far.

Is there some easy way to do this?

Here is ori file of that ecu

More timing is better than not enough, but there is a point where MPG will start declining again.

What are you trying to do with KFMIRL? Lower target load for a given torque request?

Myself and elray have both posted how to run Lambda greater than 1.

Specific constants in the ECU need to be found and changed to allow it.

Are you ME7.5 wideband?

One local tuner said that messing miop/mirl maps will make poor mpg reading so i assume that you can make it also opposite way. So modifying those maps will effect mpg readings positively.

KFMIRL is not going to help you.

If you are so worried about economy buy a diesel...
The only thing you can do is run lambda 1.05 or so (1.1 is too lean) and dial in your timing to MBT on a dyno.

What is proper way to tune kfmirl? Italian tune or just few last colums?

KFMIRL converts the torque request for air charge, milsol_w, to target load. That's it. Tune it accordingly.


This is the thread that I put together:
http://nefariousmotorsports.com/forum/index.php?topic=2515.0

My research was based on ME7.1 narrowband M box ECU, so it doesn't directly apply to your ECU.

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You can't find it via WinOLS. Please post ori.

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I'm confused. What makes you think you can get significantly better mileage than what the car was originally tuned for, outside of tweaking LAMFA and turning off SAI?

If you can't afford the gas, don't drive the car.

Ok. So you saying i am stupid? Yes i might be because i want more power and better fuel economy, not just more power.

Is that what you want to say?

I just want better fuel economy because i have seen it is possible with same base motor that i have. For some reason this AWT engine type seem to eat lot more gas then AEB or BEX.

nyet, I do not agree.
why wasting money for fuel, even if you _can_ affort it?
I do think it is smart, even if your catalytic converter cannot work perfectly anymore.

hipeka, check your LAMFA map. you can mess that to be too rich during normal drive due to that "bug" with the load axis.

all, does every ME7 or even MED9 have this hardcoded "1" Lambda?

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I have noticed a trend that certain injectors tend to be able to eek out better gas mileage than others, when tuned correctly.  This is probably because of relatively better fuel control at idle compared to other similarly large injectors, and better atomization (maybe the spray angles are better for the Audi tumble ports as well?).  I've gotten 27mpg on the highway with 1000cc Bosch EV14's, without any of the fuel saving tweaks mentioned here.

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I don't think increasing KFLDIMX and KFMIRL at part throttle are going to improve your fuel consumption...

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address 6700A
16bit LoHi 1x1

Factor:
0.0035888671875  for gas AFR
or
0.0002441406 for lambda

Op...

WTF?

"... and that was the last they ever seen hipeka."

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I am still here to bother you pro's with my stupid questions and silly thoughts.

I have read this forum for a while now and noticed that more people learn about this ecu program modding they seem to assume that all others also know what they have learn.

I have use search funktion several times and haven't find info which maps/constants/funktions affect to consumption readings. That why i asked those things and get answers like buy a diesel :)

Another thing is that my native language ain't english so that  make thing ever harder for me.

Sorry

Your problem is not the ECU.
Your problem is not understanding what constitutes fuel efficiency in an internal combustion engine.

I'll bite.

The problem is that everybody thinks that leaning out their AFR will help them magically get better gas mileage.

However, a lean burn is leaving power on the table (for a given amount of fuel), which means that for a given amount of desired torque, you'll have to use MORE fuel than you would if you ran stoich and just injested both less air AND less fuel.

If you want to lower consumption by producing less power, you're better off running stoich and using less throttle...

This is not correct. Stoich is not best economy nor best torque. It's just something for tree huggers.
Running leaner will increase efficiency.

This is also what i have been told and read. Thats why i first place start to read about this mixture change.


I have some understanding about what constitutes fuel efficiency due to my studies in polytechnic and i even manage to accomplish degree Bachelor of Engineering in car and transport technics.
I have spend quite a while at school time in carlaboratory using dynamometer and enginebrakes.
But that was years ago and we mostly test and adjust rally cars which are not weighted to fuel economy. So i might have to try find my school books back in table :)

You want to use MORE throttle to to gain economy :)

Rick

I have heard that some of modern engine control systems open egr more then necessary so throttle can be opened wider. That help redusing pumping losses and make better economy.

I still think the solution to this problem is 1.9 TDI  ;D

Pedant :P

What you say abaut this one