Hello Mr. Buick and others interested in this subject,
You might want to check with your fuel supplier, but also be aware of the IBP (initial boling point) of the fuel.
There are many things you can learn from the fuel guy if they have the time to share the data.
Typical racing gasoline starts to flash the lights (light hydrocarbon ends) at somewhere around 90 to 105F or so (the IBP varies with fuel blends). Those lights happen to be valuable relative to making power and they have some very nice characteristics chemically.
Think of it as cooking some nice sauce in a pan - the longer you cook it and increase the temperature, eventually you only end up with thick junk. All the good stuff was cooked away. Perhaps a poor analogy, but somewhat descriptive of the process of how fuel is influenced by heat. It is easier to burn the lighter ends than the tar that is left after too much heat has cooked off the good stuff.
The bum thing to remember is even though racing fuel is referenced by the same name, there is lots of things that separate one from another technically.
Having said all that drivel, there is adequate data to indicate cooling the fuel when the ambient temp (and underhood temps) get high is a good thing. Again, the fuel supplier can help you with a number to seek with your "cool can" or not.
Regards to All that like this kind of stuff,
HB2