Its an o2 sensor for data logging of air/fuel mixture.Rivet, is tht an oxygen sensor? Is it there to just record the data or is it controlling some other system. Also how are you controlling your wastegate?
Turbo with nitrous armed, 1500rpm before redline with nitrous disarmed before shutting off. Total peak is a secret.That Triumph is a plumbers nighmare for sure. That BSA looks pretty sanitary though. I'd like to see the dyno print out on a turbo brit to see if it's worth all the trouble.