Update- With these hot Cali days (93* temp) my coolant was boiling in my reservoir. Actually melted the thinplastic cap. So I changed my reservooir to a bigger one. I also drained my radiator and filled it up with distilled h2o and this Pro-blend additive. It functions like the Water wetter but it says it reduces temp up to 40* ($26 at autozone). Water wetter claimes down to 20* only.
Ran it a few times and I think it works. No more boiling over. My temp gauge actually goes down when I am just idling for a few minutes.
Raced a few cars also. Raced a Civic that looked and sounded good. Complete with roll-cage inside. Killed him. He even asked for another chance. Wasted him. Then a SL500 Kompressor stepped up with us and he wasted both of us.
I also raced a White S14 last night. Spanked him. Kept on racing me. Kept on spanking him. He was a snobby one. I would have talked to him but he just kept on trying to beat or loose me

He couldn't do either and he finally turned into a smaller street.
With all that racing last night, no boiling over.