I used to go to work against traffic everyday. the roads were always empty at 6am and I would regularly hit 115-120mph in my 96 850 NA w/200k miles. but my top speed was in a 530i BMW, I hit 145 but had to slow down because I was approaching a turn I usually take at 60. I feel was phenomenal, like I was glued to the road with complete control plus very comfortable!

Daniel
96 850 turbo wagon

 

Unless you do a flash of the base map of your ECU, it will be ECU Governed at 143 I think, right? I think thats it. If it's just chipped, it won't work.