Simons radiators are superb. Since my previous experience I now have one of his shorty’s with a smaller forward facing surface area that doesn’t protrude out from the bottom. It’s exceptionally well behaved compared to the fun I had with my first car. I’ve never checked the head sensor’s accuracy but the OBD2 always says the fan comes on at 100c and off shortly after at 93C. It’s really consistent and I don’t see the higher temps. I agree these engines are designed to run quite hot but so far to the best of my knowledge, I’ve never hit the second fan speed temp.
