Stock fuel injection / 034 EFI

[Zsolt Kovacs]

I was talking to an Audi mechanic yesterday, and he said that the due to
the mechanical fuel injection system in the 5000 tq, a controller alone
could not provide more fuel for the engine. He said he has seen where
they used extra fuel from the cold start system but that is the extent
of tuneability. (is there such word?)

I was hoping somebody could explain how the 034 EFI works, and how it
ties in with the stock system. What has to be changed, and how it has to
be tuned etc.