Numbers are from my mathematical model which I've been developing/tuning since I first joined the SLK32 clan last June2012.
For fuel - I've based it upon AFR=12
Inlet volume is based up on 90% Volumetric Efficiency (constant irrespective of cfm at this stage) x engine capacity per rev of 3.6L (includes null space at 9:1 CR) x 6000rpm c x temp and pressure - normalised back to atmospheric temp and pressure.

max CFM for SC....There's a little black magic here which I havent quite disected.
I think I've determined we run the IHI 1600 jobbie as opposed to the 2300 one used in the V8's.
I believe 1600 relates to 1600cc per rev. so at 15,000rpm for a 62/155 setup = 9.6m3/min x 35cfm/m3 = 850cfm. so its trying to pump 850 cfm into a motor which is only taking 600 or so = pressure buildup.
The pressure buildup places a back pressure on the SC and hence it doesnt actually deliver the 850 - but it does pressurise the air.
The efficiency/burn at which it can do this tails off from the sweet spot which is about OEM spec of 12500rpm and you start simply generating heat instead of volume.
Check out Boost monkeys traces in an alternate thread.

b22b

 

I should have paid more attention in school....lol. I datalog to keep from leaning......and I have seen a little more than shown here, but not passed 19. I am going to try to get the car out before leaving on vacation this weekend, and make some new runs on the street as I have lost my logs somewhere in the mess in the garage. Once I do I will attempt to post them. Then again, the card in the Zeitronix still my have the old logs on it. Just can't get into the car, as the Harley is parked there and with 1 arm, I can't move it right now....lol. I hate this being injured crap...lol..

 

Hey Ant, was trying to get an idea of the boost profile versus rpm from your first two logs. The smaller pulley has the quick spike, then comes back on later. Did traction control stop you or was it a flick of the pedal?