FWIW, rode to Cars & Coffee this morning in The OC. 6:30am on the freeway and I saw between 90-95C (~195-205F) once the car got up to temp (which is a lot faster with the T-stat than without). Ambient air temp was about 58-60* @ 81% humidity and I was maintaining 75-80mph the whole way there (~15 miles or so). This is a great upgrade if you run a cooler, but on really cold mornings a block off plate is arguably still a necessity...Even with only 10% of the
oil going through the cooler in "closed loop" mode, it's still enough flow to keep the fluid well cooled during cruising situations. Now get on it for a few stretches and that's when you wish you had a cooler!
-Dean