Even the Anti-freeze manufacturers recommend against that. Anti-freeze isn't for cooling, it's for resistance to freezing and for lubricating a cars water pump. Do a little research and you'll find that every dyno test shows that straight water will outperform 50/50 mix, and either of those will outperform straight AF. There are also additives like water wetter that increase performance even more. I run distilled water with water wetter as the tracks I've gone to do not allow anti-freeze, and I wanted something that inhibits corrosion better than just water.I run straight anti-freeze no water.