Recommended radiator fluid for street and sometimes strip use

What is recommended fluid for aluminum head and aluminum radiator car that is street and strip friendly if possible. I know tracks don’t like typical antifreeze so what is used commonly. Does everyone run water then antifreeze later for cold weather?

 

Antifreeze/water mix. Distilled water, no track I have been at cares. The waterless stuff costs a fortune but seems neat.

 

I don't think water is ever recommended because it lacks the anti-rust additives.

 

I run a mix. More coolant than water.

 

Pure water will cause a bunch of issues - corrosion, bearing wear, and sometimes the dissimilar metals thing. If you aren't allowed to run any antifreeze (and you live in a climate that doesn't freeze) then you could run distilled water + RMI-25 (or maybe there is something similar). But ideally you want minimum 40% ethylene glycol (green) antifreeze + distilled water.

And all antifreeze needs to be flushed out every five years or less.

-Bob C.

 

you definitely need something more than just water when you have aluminum parts. Electrolysis and corrosion happen rapidly and can damage those parts quickly

 

If you can afford the stuff , Evans brand coolant is absolutely the best, period!!

 

Thanks for replies. I do live in the Midwest so I do have to worry about freezing. Like right now I’ve had the car out and temps are still dipping below freezing at night. I don’t have a lot,of experience with track use yet but I have read where they don’t like antifreeze on there track. I’ve seen water wetter, I’ll read more on that. I definitely want to prevent electrolysis and any other build up of minerals.

 

Thanks again....

 

I run the Evans in the Riv and a light coolant / water mixture in the race car.

 

The only time the local track here wants water only is for dedicated track cars, mostly stripped down bracket racers for seasonal points competitions. If it’s for street legal/test and tune etc, they usually don’t care unless it’s leaking.

 

Any particular brand?
Some containers have no indication whether they are green, red for whatever.

 

You'll need a catch can at the track. Thats the only stipulation with running antifreeze that I van remember.

 

What is the best brand of antifreeze for aluminum heads and radiator?

 

For aluminum parts, on both cars, I bought a gallon of RMI-25.
(not specifically speaking to the racing/track issue, just FYI)

Add 8 ounces every 12k miles.
For my 2 cars, it will last a long time.

 

What people seem to forget is that one of the reasons to run antifreeze is to raise the boiling point. When a hot motor is shutoff heat soak causes the water in the block and especially heads to go well above the boiling point of water. With plain water you will get steam and boiling in the heads.
Yes 15lb radiator cap raises boiling point some but not enough in many conditions.

It is really antifreeze/antiboil.

Track only cars often over cool so they don't even reach 200 after a pass even with heat soak. They can get away with it....