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I have no idea how it is calculated, but suspect it may be derived from mass air flow. The logging parameter is "engine torque (actual)", then the rest of the calculations to get from Nm are pretty straight forward, as detailed above.

Here's the boost plots, MRP (bar) vs rpm

PS This was with 1.5 bar peak, 1.35 held tailing to 1.2 bar at peak power. Charge temps were in the 50-60 degrees C range at the end of each pull (particularly in 5th) so not a bad result I reckon...

Was doing some logging on my brothers MRC Stage 1 tuned B5 RS4 yesterday when found a VAG-COM block (120 IIRC) that records "engine torque (actual)". Now, I'm a bit dubious as to how this is measured, but I took the logs, calculated torque in lbft (Nm*0.737562), then converted to bhp (torque in lbft...

Get VAG-COM and silence those doubters

Oil in the intercooler pipes is common, and results from the crankcase breathers venting to the turbo inlet. You need to vent the crankcase to prevent pressurisation and to extract blow by gases and water vapour that if left in the crankcase would cause corrosion. Unfortunately the blow by gases dil...