Coooling

[40 Bud]

Anybody had any experience with using Evans "NPG+" waterless coolant in their 40? It is a polypropolene glycol and is expensive ($28 US per gallon). The question is does it work and is it worth the price?

 

[Jim Rosenthal]

I think we had a thread about this quite a while ago. It probably does work. There are some advantages to waterless coolant- no corrosion, I guess. It would be an expensive experiment. I thought about this for my marine diesels but the cost of it at seven gallons per engine put me off it. Would be interested to see results if you try it.

 

[Ron Earp]

GRM just had an article about it with their project mustang converted to this. Didn't really say yay or nay, my question was what is the point (in their case)? Car cools fine, runs at 180F, what more do you want? Requires a special expansion tank though due to properties of this coolant. Be careful for future work though - SCCA events mandate water only in coolant and many track day groups simply copy SCCA rules for the most part.

Ron

 

[Phil]

Ron
I agree totally.....If it ain't broke don't fix it...I use Dexcool, compatible with aluminum, cast iron, steel, copper, and whatever you might find in a cooling system. If you need something exotic to cool down the system it is probably inadequate in some way and needs something as simple as a larger cooling surface or better venting, if you don't have either I don't think the magic liquid will do much good.
Regards
Phil

 

[colin artus]

Isn't the point of NPG that it allows the engine to run hotter than with a water based coolant, not that it can improve cooling? Hotter is more efficient therefore, in theory, more powerful. I seem to remember that they provided their own spec water pump to cope with the extra 20% volume requirement due to the less efficient nature of NPG. It would only make sense if the whole engine was tuned/built with this system from the start.

Colin Artus