[mwebb]

sorry
you are incorrect on all counts

on these systems timing is pushed against the knock sensors , and the system can control timing advance and retard on each cylinder at all loads and rpms , when the "tuners" advance the timing they are just forcing the system to run in knock retard much of the time assuming they have not defeated that function in their ignorance .
which kills engines

then we have the leaning out the AFR myth
only happens at cruise with light load , has no effect on overall performance and it is a "good "feature that should never be tampered with

AFR can change under boost
or not and does not always change on VW and AUDI
and
expect calculated load to get close to 200% with 1 bar of boost
or 150% with .5 bar of boost , 7.35 psi , more or less .

a quick and easy way to test your system unless the "tuners / tamperers" have defeated that function too
in their ignorance

Originally Posted by Ladogaboy

I disagree with this. Stock performance tunes tend to improve performance/power by leaning out the AFR and increasing the timing, both of which help with fuel economy.

I'm in a similar situation to musasabi, and from my experience thus far, boost is generally bad for fuel economy. Part of the reason is as boost increases, the AFR will get richer, and you are tracking further away from stoich.

The 80% load might still be accurate; however, if you can get a map of your boost profile, you'll be able to tell what your rpm range is. For me, as long as I stay under 2,500-3,000 rpm, I'll be generating little to no boost even at 80-100% load.