Throttle Plate Angle - Durametric

[apex944]

Have been using my Durametric to try and isolate a misfire on my 1999 (DME 5.2.2) cable throttle 996 C2 (race car) which has a RoW tune.
Unrelated to that testing I noticed the recorded Throttle Plate Angle when pedal is fully depressed (WOT) is showing 78%.   
A visual indicates my throttle body plate is easily opening to 100%.

Do I need to worry about the DME getting this 78% signal when in fact it is 100% or does it calibrate itself but not show a calibrated value in the software? 

[Loren]

I don't think so. Durametric (nor Porsche (PST2, PIWIS 2, or PIWIS 3) diagnostics are designed for racing.

996 GT3 RS have a special race tool but I am not aware of race tool for street 996.

[apex944]

Engine is largely stock.  So for a street car, would the ECU seeing only 78% when pedal is 100% depressed be an issue?