do they work? have you advanced the timing on purpose (off boost of course) to check if you easily hear it?

have you got 4 microphones, so one for each cylinder?

i didn't see what you're using. did you post it up?

i'm interested as i will be doing the same with mine and an S8 in the future (but with only 4 injectors so should be a little easier using the supplied 4 greens base map).