Exactly what maps need to be adjusted to take advantage of Meth?

It seems the general consensus is:
KFZW
KFZW2
KFLBTS

Is that it?

TABGBTS is stock at 499.99, and FBSTABGM is stock at all 1. I don't believe these should need to be adjusted, correct?

I have not touched KFFDLBTS either. Does this need adjustment? I do not want to disable any safety features.

I am putting on my ARD bipipes today and will take some new logs. Then, I will be making adjustments accordingly.

Any insight is greatly appreciated.

Josh.... If I have time, I will try to get some WiFi somewhere and take some logs of your file as well.

KRMXN is the map for max timing retard... as mentioned you can increase this as a safety measure.  I will be adding this to my meth tune.

Its in the TB, post TP.


Not sure where you're going with this?

Going to post some thoughts.

If you really want a big benefit from meth, you need to run a lot of it.
Running a lot of it means that you need take out some fuel, or it will run too rich.
Plus the timing.

Looking at the Aquamist HFS-3 kit, it has a level sensor and a flow sensor, to make meth injection safe. Usually with the Aquamist HFS-3 kit fitted onto these cars, it is wired into the N75 circuitry, disabling N75 if meth runs out.

While this approach is fairly safe, and you won't blow up your car even if running lots of meth, it means the car can't run properly without meth.

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Here is how it should be solved, and how I solved it on the Audi 2.2T 5 cylinders.
The 2.2T ECU has free logic inputs on the chip calculating fueling and timing.
So I put a relay inside the ECU and made the meth kit (or for example LPG kit) toggle the relay. And the relay switched that port on the processor between ground and Vref (+5V). To have 100% safety against broken wires, I made it so, that +5V needed to be present on the processor pin and the relay needed to be activated to switch to the "meth" maps...

The master table in the ECU was at 0x8800. I added another table at 0xE800 (an exact duplicate of the first one), and then went into the map access routine in the ASM code, and added simple logic, that just adds 0x60 to the high byte of the table address before accessing it based on whether the port connected to the relay is high or low.

After this, I made copies of the maps I wanted to be different between the two tunes and changed the pointers in the second table to point to them.

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So, I want to do the same on the ME7, because I don't want my RS4 turn into a dog every time I run out of meth.

I haven't looked much at the hardware or the software of this ECU yet to be honest (meaning, I have not loaded it up in IDA Pro yet and I have not looked at the PCB), but perhaps one of you that has wants to help me, and well really everyone around here who is running meth with a kit that has a flow sensor.

So let's start with the questions - does the main processor have any logic ports that are not connected to anything?
If not, we can do this for example by removing one EGT sensor and writing extra code that reads that input, while averaging the second sensor over both banks...

The plus of this approach is, that with a flow sensor on the meth line, you actually switch maps BEFORE knock and possible damage happens. So it is 99.9% safe and it is proactive instead of reactive.

Okay, that's a good idea, but how is this input presented to the processor itself?
Is it directly available on a pin? Or does it go through some sort of additional I/O processor?
It is probably processed by an ADC, isn't it?

I guess disassembling the instructions responsible for CAT efficiency codes would shed some light on it.

I can double check which pin the post cat oxygen sensors connect to the processor on the ME7. I have the info written down on my other computer.

There are multiple map access routines based on if the map is 1D or 2D and what the data types of the axis and map data is.

So far no one has shared any IDA files. I have thought of posting a basic IDA file with the correct config and memory mapping, but I haven't had the time or the motivation to do it.

Cool, thanks for the info Tony.

I guess only the main fuel and timing maps really need to be patched.
If running more boost, the boost maps as well.

In M2.3.2 there were only two map access routines - one with interpolation enabled and the other with interpolation disabled, so it was easy mode.
I'll start with IDA once I port my RS4's factory map to M-box. Seems that this is what everyone is using for some reason, and makes no sense to develop elsewhere I guess?