MED9.1 disappointment on the dyno  

Last week I finally took my car for a run on the dyno (Dyno Dynamics model). I thought my existing logs driving up and down the roads were looking decent enough, so now for the moment of truth!

Car
Audi S3 8P MY2008 ~ 70 000 miles
BHZ engine (K04) 2.0 TFSI
8P0907115H
387951
HW mods none (completely stock OEM hw, major service last month at the main dealer – oil, oil filter, air filter, plugs etc)

I was a bit disappointed – just 279 bhp. Stock is 261 bhp and I was hoping for closer to 300 bhp still on OEM hw just going on the MAF reading.

Thing is, I’ll stick my neck out here and say I don’t think it’s a sw issue. Actual boost 1.2 bar  at 6500 rpm. WGDC 95%. Fuelling ~0.81. CF < -2.25. MAF ~ 238 g/s. Throttle Plate ~99%. No DTC’s.

Before I go looking for non-existent hw faults, is this as good as it gets? (K04-64 compresssor map…) Anyone got some stage 1 results (i.e. sw only) I could compare against?

I had the logger going during the dyno run, so the pictures below are all from the same session. Actual Boost and Load really do seem to fall away after 5500 rpm

That's about all you are going to get out of one K04.

R

maf x 1,25 approx = HP
your reading maf 240 *1,25 approx 300hp
dyno not good  calibrated

No. You can move the same amount of air with 5 degrees advance as you can with 20, and I assure you the hp levels aren't nearly the same.

Those Maf - HP conversation are not correct at all.
If you have an old Maf sensor and tune your car it will read low showing you low Load readings but the car will still make good power. Once your old Maf is done and you buy a new one. It will read higher. Your fueling will be way off. Once you dial in your fueling again the power will be still the same.
Then you have diff power based on type of fuel you are running still the same Maf readings.

so if boost psi is way low and ps_w is really high then Diverter valves?