Hello,
Fairly new to this so here I am seeking guidance... Car is a 2001 Audi Allroad with the 2.7T APB engine attached to that "amazing" tiptragic transmission.

Im wondering if anyone has a road map / hardware guide to the 7.1 ECU.
My goal here is to replace the primary O2's with wideband units ( yes im aware that I will need a controller ) and add an octane / ethanol sensor

I have 3" Catless downpipes on the AR...

Idea was to code out the rears as well as disable the Catalyst Efficiency Monitors and a slight tune to start.

However the idea is to unlock the full potential of the ecu which as much as it sucks that no one has fully figured out the ECU.
I know the GM boys have HPTuners suite that allows you a ton of flexibility and tunability compared to our ECU's which are still a grey area from what i see so far.

Im a certified Automotive service technician with a little over 20 years of experience working on the VW's and Audis owning a fair shar of both over the years. With that being said I have some experience with domestics as well...

Plans for the AR are fairly standard...
I call it Project Stealth Wagon

Drop the tip out and replace it with an 01E, K04/RS6 hybrid turbos, AWE SMIC, AWE bipipe, 2.8L heads and cams, tubular manifolds, list goes on...

My biggest concern is the fuel around here... with extremely cold winters i still want to be able to DD the car. With that being said the fuel quality varies with additives and ethanol content. therefore these options really can make or break an engine out here.

I want to retain the stock EGT's , replace factory primaries with widebands and as mentioned add an octane "self tune" based on fuel rather than swapping ECU's based on fuel type. Tenatively also one of the inputs could be used to switch boost tables between street / track modes.

I know i still have a long way to go and lots to learn...

why does everyone think the 2.7t is so legendary? its a 90* wedge shoehorned into a engine bay thats too small. power per footprint is really crappy. i honestly would rather have a vr6t

Well... lets disect this:
 

 - thats why I'm here to learn and hopefully spark some interest and get a few people on board as more heads are better than 1


 - idea here is to try and keep fueling in line with ethanol content as every station out here as different "average" range which in fact is sorta like flex fuel. the boost would stay stationary however the timing can be adjusted to be more aggressive. As for altering boost i want to use a unused input to change the boost level to a secondary boost table on the fly.

As far as the coding goes...
I been dabling a little bit but can barelly consider myself as an amateur at best.

As far as the ECU goes i quite versed on the hardware side as I do most of the diagnostic in the shop i work in and undrstand the I/O quite well. My original question was though if anyone has figured out the min/max to every I/O to the ECU and where is it mapped to.
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Factory ECU's have came a long way and they have more than enough "muscle" than their predecessors when the maps were loaded on ROMS which were soldred in and the ECU's had to be socketed and run emulators like the Ostrich to tune and then burn a coresponding rom for each specific fuel / even that they were competing.
So yes... technology came a long way!

Its easy to come up with ideas. When you need others to do the coding for you it will be expensive and if you do some digging youll see youre not the first whos had this thought. Anyone whos able to make such mods surly will not have free time for a open project like this. This isnt romraider

An alternate solution would be to leave the narrowbands in place and add a wideband bung, or code out the rear o2s and put wideband(s) in the rear bung(s)

Note that ME7.1 doesn't really like simulated narrowband output much. YMMV


Yes, but most that claim to have done so (incorrectly) think alpha-n is the same thing as speed density. True speed density on ME7.1 would be as complex to implement as wideband O2 support.