OK, I think I got a piece of the puzzle figured out for using RS4 injectors. At least for the cold start issue. This is my theory that I am going to test out.

If you look at the start condition, the engine uses split injection. The first injection is around 300 degrees BTDC in the intake stroke, and the second injection happens around 60 degrees in the compression stroke. Now if you think about the purpose of the two injections, you see the first injection gives a very lean homogeneous mixture that produces a small amount of soot compared with a traditional engine using overly rich conditions to start the engine. This won't fire by itself, at least not in a way that would provide smooth starts and a good idle. So you fire a second injection during the compression stroke that concentrates fuel around the spark plug to give it a little boost and idle smoothly with a combined lean mixture for emissions.

So when a person builds an engine with flat top pistons, lower compression, and larger RS4 injectors, you basically mess up this second shot condition. Now the RS4 injectors have more lag at the small injection times for split injection, so first you need a little more compensation during these small injection pulses. To do this you adjust KLTVTSV.

Also the second shot mixture isn't as efficient at being concentrated next to the spark plug. To fix this you can fire the second shot closer to TDC to help keep the charge next to the spark when it goes off. To do this you adjust the two split condition compression stroke maps in the low rpm/low load region. These are KFWEHK2K1 and KFWEHP2K1.

The end result should be a better concentration of fuel around the spark during cold start.

And here are RS4 maps.

As you can see the new RS4 injectors (with multi-hole tips) do not behave like the old single-hole RS4 injectors.

For people tuning the old single-hole injectors, you should first try maps more like these.

This is really useful, is use 079906036D  which are injectors used in Audi and Lamborghini V10, I use them in a 2.0tfsi from an audi s3.

I copied the "lag" maps from Lamborghini, KRKATE I adapted to get  good LTFT.

I guess I need to workd on the inj. angle at cold start.

rgds

Thank you KmosK04 for the MED17 info.

So the plot thickens, when you look at an MED17 file for a new 2.0 TSI with multi-hole injectors, it looks kinda like a cross between the MED9 RS4 information and the FSI 2.0 data. I think you can't just adjust the tables independently, and you have to consider the combination of how they work together. I will try the whole set of TSI maps in my FSI and see what happens - For science!

Interesting. Can you post what you use for the angle maps also?
EPY

I use standard from S3 (I think 70,5 and 60 if i remember right).

I tried today another version of what I found in a Lambo map (inj lag) but it didn't help my slow cold start.

rgds

Does anybody have a damos for a 2011 or newer R8? That car comes with these injectors, so I would love to see what is in that file.