I don't believe you have to baby the car at first, but do vary the engine speed.
When I worked for mastercraft, I went on a couple of lake tests(very fun:green , especially on the 197. That thing can literally throw you out of the boat it can corner so hard.), and they run the hell out of the boats for about 7-8 minutes. They mainly did it to burn off this stuff they put on the seals, and that stuff did stink and smoke really bad. But they would run them up to the redline, and hold it several times. Then take as sharp of corners as possible at top end.