whats a good anti-freeze to water ratio

[speed]

We'd ran straight distilled water in the 360 challenge cars, but for all mine i usually do ~60/40 water to antifreeze

 

[TurboStreetCar]

Just hoping corrosion won't catch up to you?

To whoever said distilled water doesn't boil... LOL

One more thing, I don't believe Toyota red coolant is available pre-mixed. The pre-mixed is the pink stuff IIRC.

theres 2 types, theres regular red premix and then the pink witch is high mileage, when i worked at the toyota dealer, they wouldnt change the pink stuff untill 60 thousand miles. both are premix.