SVO MkII
Well-Known Member
That seems to vary a bit by region. I've been doing HPDE with various groups around the Midwest since 1997. I have never attended an event that required only water. Obviously, for racing, where the likelihood of vehicle to vehicle contact is great, water makes sense. For HPDE, it is overkill.If you're on track, it should really just be distilled water and something like Water Wetter to keep the pump happy and surface tension low. You'll gain a little in heat transfer, but boiling point shouldn't be an issue. The pressure in the system should address that concern.
One big problem with running coolant on track is losing coolant on track. That quickly makes a little problem a big problem and potentially for several cars.
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