hi all, im relatively new to the whole custom mapping so please bear with!

i have an audi a8 2003 4.2 with an ME7.1.1 ecu 4e0.
i cant get the map off of my car yet, but i have a copy of one from the same vehicle to tinker with.

the software that i have is the nefmoto flasher, tunerpro, winols and an ecu grapher and some checksum corrector. ive also done a lot of reading in the s4 forums as they have the same ecu and read the s4 tuning wiki.

my problem is, is that ive run my audi.ori in winols and it states that there are 89 potential maps. great!... what do i do now!? i may also note that i do not have a damos file, xdf or a2l for the ecu. does anyone have any of these? once i do, what do i do after? how do i link the xdf / damos file to the map? basically, what can i expect?

thanks for any help

C

Unfortunately, not much.
There's very little (if anything) to be gained by tuning NA car.

As far as damos/xdf files - you can start by opening a known documented binary, then try to find patterns and find similar maps in your bin.

that isn't happening either. why would audi leave any MPG on the table?

this is the bin file i have. this was taken from an a8 4.2 auto... which was taken by a user of this site. this is the bin id like to play with.

c

All the more experienced people here will tell You that it's pointless to fiddle with a NA engine, especially with one that is relatively good from the factory, as there isn't much room left for tuning (for power). With NA engine pretty much all the improvements are made with ignition advance and rpm. Factory makes the engine so that You can run it to redline all day. If you're willing to ignore these safeguards and add some advance, maybe raise the redline, You can get something out of it. Realistic goals are maybe 10% over stock and even that might be reaching it.

The A8 is a very nice car to have and the 4.2 engine is a very nice motor to put in such a car. It won't be as powerful as a 2.7T but as a luxury sedans engine, the 4.2 is supreme.

As for dropping cylinder's for fuel economy... Impossible. You'd need a totally different cam/valve control.

I chuckled.

Answer: don't step on the gas as hard. Seriously.

It isn't clear you're listening :/

There is zero reason for the manufacturer to leave even a little MPG on the table, AND you have a V8. It will never get decent MPG.

Someone who calibrates ECU's for a living.
So you are a wrench - does that make you qualified to say something about how ICE-s work? No.
Computing? No.
Idle RPM on hot start is a compromise between vibration and fuel efficiency. Also, Idle RPM is nearly irrelevant to fuel consumption unless your car spends the majority of time idling.
If the RPM is pushed below what it effectively can run, fuel consumption increases.
This means leaning out the mixture. The engine runs closed loop lambda 1 when cruising.
Putting it in open loop, then leaning this out significantly will lose power and increase fuel consumption.
This is the main reason why I called you out. The engine will use a lot more fuel this way. Anyone who knows how engines work in the slightest knows this.
But not you.
Unless you manage to stop the intake and exhaust valves from opening, thus creating an air spring, all you do by cutting fuel to the cylinder is increase fuel consumption.
If you had 1/10th of the credentials you claim to have, you would already have built this xdf from the information that is found on this forum.

Good luck.