FWH - it calculates it on the slowdown part of the graph.
From this it can (cleverly, somehow) work out what the power loss is due to transmission drag.
no idea how - just know that's what it does
@ robbo - nice one sir!
@both - interestingly, when I had my standard engine done, the transmission losses cam to about 20bhp, not the 10 bhp awesome's did.
My max bhp @ wheels was about 128 too...
Diesel Tuning UK 'chip'
