I agree 200-210 isn't hot. 100%.
But here's the issue. There's no room for error. Idling in traffic because of a traffic jam. Moving up less than a car length every minute or so. In the middle of a hot summer day, which would otherwise be a nice day driving down the road.
There's no room for error. I used to think the same way. 200-210.......even 215-220 wasn't hot.
After my EXPERIENCE with this hot slant 6 in Vixen and what I did and was successful with combating the heat, I've changed my tune. I believe now, in real world performance engines, keeping them the coolest you can is best.
Then here comes the argument running too cool adds extra wear, etc. Then tune for it. It's all in the tune. That's what I did. It works. The trick to all this is not letting the engine ever get to "that point" where there's no room for error. Because if you do, there's gonna be an error. There always is.
I don't want my "normally 200-215" engine stuck idling in traffic. It won't be a happy camper long. A stock engine will run like that all day. A performance engine will continue to generate heat. It's their nature. With advanced timing curves that start the ignition process early and burn it a long time, that heat is in the engine. It'll build up at idle and low speed and has nowhere to go. It WILL overcome the cooling system, if your normal operating temperature is 200 plus. Why?
There's no room for error.
