I am definately going to try that, thanks!
Hopefully the new radiator should also be in in a couple of weeks but trying this out first with the old one to check the difference.

 

Found a chart for it though I am not sure how accurate it is.

 

Ok, would this mean that you're getting 20% less cooling capacity when using 100% coolant opposed to when using 20% coolant and 80% water?
Waht would the corrosion effect be when using so much distilled water?

 

The thought is that you use a small amount of coolant. I run around 20% on my street cars, but I am in Florida.

There are also additives such as Motul Mocool though I honestly think they are the same thing as coolant but with more surfactants. I haven't been able to fund much info on them though a lot of people claim they work really well with just distilled water.

I think most corrosion problems arise from people using tap water.

 

Over the years of racing I've seen Water Wetter solve numerous showroom stock cars overheating issues. One that comes to mind was a Cobalt that would not over heat but get hot enough to pull timing like crazy about 3-4 laps into the race. Owner told me that it never happened when he raced in cooler weather up north. This was an SCCA double so he poured water wetter in it saturday night and sunday's race he beat all of us cause it never got slow on him. Bad advice on my part.

 

I have used water wetter to great success too.

Tim

 

Basically, traditional antifreeze is great for it's name (i.e. providing a lower freezing point). However, it does't dissipate heat as well as water. Therefore, running a higher mixture of water with traditional antifreeze will give you better cooling than 100% antifreeze (as it will make the radiator more effective). You should run the lowest amount of antifreeze mixture per water needed for your climate to maximize your cars cooling capabilities.

 

I had a twin pass rad made in the uk and it sorted all my track temps. I see a max of 93c then once the fans start it pulls it down to 87-88c then keeps doing that cycle. Oil gets to 110c for reference. This is while doing about a 20 minute track session.

 

Nice. We're you running an airco?
What power were you making?

 

Antifreeze also raises the bolting point.