Here’s an interesting video, shot on board a 900hp Porsche built by 9ff. The video description tells us what’s happening.
“Street testing experimental MAF sensor setup. Riding in cruise mode and transition to half throttle. Result not satisfying: back to the dyno. Second test is Harry’s Laptimer Speed Display. Result ok for documentation purposes.”
I’ll say it’s okay: 277 km/h is 175 mph and obviously nowhere near full throttle. These 9ff cars are something else.