The evolution of my 6R4 replica continues, i took it for some power runs on the rolling road at Motoscope/Northallerton. More than happy with the results, from a self built car/engine (see my other videos..) and doing all the ecu mapping myself on the Mbe 9A5 ecu. With 3 switchable boost settings/maps it made-

#1 Switch position, 0.75 bar of boost = 428.7bhp 385lbf
#2 Switch position, 1.25 bar of boost = 495.4 bhp 423lbf
#3 Switch position, 1.9 bar of boost = tyre smoke! lol