We had the luxury of assessing the stuff we got for free for testing, based on "if it works, we'll advocate for it, if it doesn't, it wasn't even here", so we don't need to back up misguided purchase decisions with non-arguments. No one who invested an insane (compared to regular coolant) amount of money into something that is supposed to be superior will have the will to admit a failed purchase. Point is, we have applied some knowledge, science and calculations to justify the application. ![]() Do not put carrot juice into your cooling system, trust me, I did it). We've been running anything from pure water to Evans waterless, possibly we were the first in Europe to try it back in 2005 (actually anything, as we once had to resort to a 1 liter bottle of carrot juice which was the only liquid available at hand in an hour of need. Mate, I ran various race cars on various systems and coolants, including reengineering a superlight time attack BMW with a radiator half of the original size and no thermostat but a number of electric water pumps managed by the ECU for varying flow or a cooling system for a drift S14 with a swapped 1200HP turbocharged LS using a radiator from a freight truck stuffed in the trunk. Operating so close to vapor pressure seems like a terrible idea, I would think if automotive cooling system were starting with a blank sheet, that we would use something with a larger margin of safety that what we have now. My old P38 had visible cavitation damage on the water pump impeller probably due to the low pressure at the impeller dipping too close to vapor pressure. And the example for this is the need for the expansion tank to allow for coolant to go back and forth with heat expansion, I would think this is due to steam pockets and there higher rate of expansion, not just liquid thermal expansion. Sure, the fans might run, but I would expect that the passages in the heads of a hot engine, to turn to vapor since its only take about a 20 deg increase to get you there. How could they not when the engine is shut down? AFAIK, there is no circulation in any car engine once the engine is shut down. ![]() But I do feel like there are times like high engine loads or even after-boil, that parts of most automotive system have vapor in them rather than liquid. Your point about Evans coolant also expanding like any other liquid is valid as well. But your points about using a heat transfer media the system is not designed for, is a great point and enough to give me a pause. Like others point out, you can't compare pure water to 100% glycol in our case. The heat transfer fluid does not make a linear impact to the effectiveness of the system and it can absorb and transfer the heat to atmosphere, its going to function perfectly as those you are using it here and chimed in, are finding out. But the temperature outside is going to affect the performance of the system to remove heat. I get that mechanically, the cooling system acts the same way. I just think the idea is worth exploring as we are doing here. ![]() I'm not a shill for Evan's products, never even used them. Let's see how it performs in USD if we replaced the conventional coolant on a brand new vehicle:Ĭlick to expand.Wow, I stepped away for a minute and lots of good discussion. This brings the Evans' conversion to $540 in fluids and $220 in two system flushes for a total of $760.Įvans' coolant isn't eternal (it is rated at 20 years), however JLR recommends changing the coolant in the AJV8 5.0 every ten years. After prepping, the conversion fluid is replaced with actual waterless coolant (depending on the flavor, around $55/gal), for the price of $330. Add $98 to $123 (state-dependent average price for coolant change in continental US) and we are in the area of $200 for single coolant replacement in conventional scenario.Įvans coolant: prep (conversion) fluid goes first, $34.95/gal at Evans' website, the prep fluid is $210 then. A gallon of antifreeze goes for like 15 bucks in Autozone, so it's about $90 for a complete change, since we buy by a gallon and not the exact amount needed. Or, to put it differently, a conventional coolant performs 22.7% better than Evans waterless.Ī 元22 5.0 takes around 20 liters of coolant (more or less, depending on the number of climate control zones). So if systemwide efficiency with a conventional coolant was 100%, it drops to 81.6% with Evans' waterless coolant, roughly by 18%. So let me get to the more or less same outcome with a bit different maths: A solution of 50/50 ethylene glycol and water has 81.5% heat capacity of pure distilled water. Click to expand.Evans' coolants are propylene glycol, which has different physical and chemical properties than ethylene glycol found in conventional coolants.
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