Turk,
My iron beast 460 just cooks in the summer. I run water only at the drags no big deal it's only running for a minute. However getting caught in a summer traffic jam for 1/2 hour will push lots of boiling water out my overflow. If I run 50/50
antifreeze it will not boil the mixture and even though it gets hot,the water stays in the system. What the Nascar guys and SW guys didn't tell you is that they all run a very high pressure rad cap, not the street caps we have. The high pressure caps keep the water in the system and let the cooling work. On the street caps the water is blown out of the system and the engine overheats.
Running the engine in a confined cobra engine bay is completely different than on a test stand.
Just my experience.
Perry.
