My old 1905 big American block escort turbo running cams, vernier pulleys, s1 air cooled hybrid turbo, 2 stage switchable boost running 12-23psi was on a rolling day and I was suffering from traction loss so a few of us jumped on the front after around 3-4 runs and my turbo was glowing that much the turbo blades was visible on tick over slowly turning.....it was amazing to watch but scary..... I was worried but they said the turbo will do this under extreme pressure and is quite normal on the rollers... I was just glad it's under the bonnet and you couldn't see it lol......
Good day though was just shy of 300hp