I guess I should report back on my actual results with the CSF radiator. I have logged similar laps on the same track under similar outside air temperature conditions to make the comparison. I must say that I was hoping for more improvement. The cooling has gone from marginal to barely acceptable on this track under these conditions.
This is with a mild AccessPort Drive tune on an N54, so any hotter tune would further accentuate the problem. Oil temps are fine. The engine is still coolant challenged on this track (which admittedly is a tough one on cooling).