I am not dogging the Maxima by anymeans due to it sweet power, but that dyno sucks. The straps had to of melted because I don't see a 400+ hp car breaking those. Here in KC our local dyno we had a car max the dyno out at 1,200 hp without any problem. If the tires were spinning for ya on the dyno then you arent getting true hp readings. I just want to understand why the strap broke and why the tires were smoking. I have never seen 400 hp do that. My Mustang makes 450 hp and it was stirdy as hell on our dyno. It did get a little squirrely though.