Coolant additives?

[bjtheman1]

I use Royal Purple Ice

[LS1Goat]

Another vote for water wetter. Seems to help a little and it's cheap.

[momo]

distilled water + water wetter is great if you wont ever see freezing temps but offers less corrosion protection.

a 33/66 antifreeze to water ratio is reportedly good to 0*F

[cool cat]

Went with water wetter, and 1/3 coolant and 2/3 water. So far it is a little better, coolant staying around 200. Now I need to get it on a dyno to see what the a/f is doing I suspect it is a little lean. In the future I might look into a high flow water pump, probably just modify the one I already have. I had one of those years ago and it helped brings temps down a little more.

Thanks for all teh advice.

[Captain Crawfish]

can you somehow get more air through the radiator? possibly a larger fan or even a larger radiator? more expensive but if you get more airflow and more cooling surface area that would help alot.

[jayjohnson600]

Beside the standard stuff mentioned in this thread there are some things that are lesser known that can contribute a little bit to elevated coolant temps.

Not much need to run a thermostat in the Texas summer.
Might even eliminate an issue caused by it.

Is the timing where you want it?
Might be running a touch lean and too much advance in these summer temps.

Next plug change for the summer, run a hotter plug.
Colder plugs move more combustion temps to the cylinder head.

Are you running enough oil in the pan?
Not enough oil can also raise engine temps.