Club Cobra - Evans Waterless Coolant

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Evans Waterless Coolant

Discussion Tools

08-08-2013 02:17 PM - permalink

BAsque1

Wow I on overload!! I have been using Prestone almost pure not 50/50 and I also added water wetter to the mix. My fans kick on @ 200* my optimum temp on open highway is 180*-185* . After I saw the video on the Evans site I was inclined to change but based on what Xack is saying this coolant does not keep the temp but stable. How about changing the thermostat for a lower temp thermostat maybe 165*-170*?
Lou

08-08-2013 10:58 PM - permalink

BOBOCobra

Xack, I think you will be fine. I'm running 80/20 water/coolant and in 64* ambient I cant get it over 175* rolling down the highway,I need to move up to 180 t-stat. I am about 100-110*+ambient at ram air and 195-200* in heavy traffic in hot afternoons. Run it with whatever mix you think for a while and see what it does. Pure water is the best heat transfer fluid and dilute it as little as possible with coolant based on your climate. Never gets below 30* here so I run just enough to keep things lubricated. Stick to basics, distilled water plus minimal coolant, get the air out, move air across core, move fluid through core. 16 lb cap gives you 250*+ boil temp. If you are over that temp there is something wrong that you need to fix.

08-09-2013 09:29 AM - permalink

Xack

At 200, there are points in the water jacket much hotter. These points will boil 50/50 and EVANS. The greatest contribution of EVANS is that it controls the boiling at these hottest parts... even at stable temps. As the Tech at EVANS states, If your engine runs more than 20 degres hotter with EVANS, ~220-230, your cooling system needs to be redesigned. This is because you do not have enough capacitiy within the system to cool your engine when it's stressed. If it runs at around 200-210, this would be normal, and your engine will get better gas mileage. Temps around 180-190, your system is designed well with extra capacity. He says, in this case, some people have actually seen thier temps come down with EVANS. Well designed systems with EVANS will not have pressure.

08-09-2013 09:41 AM - permalink

Xack

Pure water is best at heat transfer, true. But the problem is that it will boil at 210.. The micro-boiling is going to happen more than 50/50. Boiling removes H2O's ability to remove heat completely. YES, COMPLETELY where it's happening. H2O is boiling ALL THE TIME in an engine at operating temps. Yes, thats why its a pressurized system, to raise the Boil point a little. Yet temperatures will fluctuate much more due to the ammount boiling at any given time. The more that's happening, the more your temps raise... and particularly at those HOTTEST spots in your engine, the heads and gaskets.

08-09-2013 09:48 AM - permalink

Xack

Regarding the T-Stat. The EVANS Tech says to remove it and clamp off the bypass. This is because you need to increase flow from your pump to improve heat transfer with the coolant. Also, these cars do not see cold starts at winter temps anyway.

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