I finally restricted the HUGE 1" bypass hose and put a 3/8" hose on it. That in theory forces more water through the rad. And reduces the hot water recycling back into the engine. My car runs 200 max now on the highway after some hard runs.
That's really interesting and almost amazing. Never thought of that but it does make sense. One thing I would add is that I'm a huge fan of engine oil coolers. They can pull out a lot of heat as well.
