Just an update... in case ANYONE cares. Had the first few REAL tests of the fan's functionality this week. First came the other day when I went for a nice leisurely cruise... in 90 degree temps and 50% RH. Sitting in traffic was where the temp was highest, at 181. Boosting down the highway, multiple 3rd gear pulls, temp stayed locked around 178, sometimes dropping on SLIGHT declines in the road. I was pleased.
Tonight went out with a few friends... LS1/6s out the ying yang, temps were in the 80s tonight, less humid. Needless to say there was a lot of 2nd, 3rd, and 4th gear pulling. Temps once again stayed at 180 or less. Raised only slightly to ~182 after turbo timing for about 5 minutes... then I cracked the hood and the temp almost immediately started to dip. I am very pleased with this fan, and to me for my purposes... this passed the test.
Again, sorry for resurrecting an old thread, but I thought people should know what my personal results have been. Thank you.
-J