![]() But before you call, you need to check out the following service bulletins by the European Aviation Safety Agency (EASA) AD 2007-0155, and FAA SAIB NE-05-84R1 to get information about coolant usage. Replenishing your engine’s conventional ethylene-glycol/water coolant with its waterless type coolant should solve your overheating problem. (ECS) of Sharon, CT, ( has something that may help. Has the engine temp on your antique, homebuilt, or unmanned aerial vehicles (UAVs) been running a little high lately? If it has, then Evans Cooling Systems Inc. In my case, it's been the same as when I was using distilled water, antifreeze, and Redline water wetter.Ī look at the technology and SAIB NE-05-84R1 ![]() My current water temps using Evans at 16psi tuning the TEC is between 200 and 210 degrees f. I've only used distilled water and high quality retail antifreeze. ![]() When we pulled the motor, there were mineral deposits beginning throughout the water jackets. There were also signs of my head lifting. I'm using Evans because there were signs of detonation on my number 4 piston. I've used antifreeze, and in an emergency, I've used water from a garden hose. It doesn't matter what anyone chooses to use. are you ready for this.the NPG+ coolant allowed such an aggressive tune that the motor put out 75 horsepower more than it could with EG/water at 6000rpm." the subject was a 2002 Ford Ranger with twin turbo'd V6. "PHR just put the EVANS NPG+ coolant to the test. But as it also reduces knock while doing it, there is a win-win scenario. It is actually insulating the combustion chamber with this heat, having a similar effect to coating the walls with something like what Swainetech does. This means that temperatures inside the engine increase to make power power, and is also why it is SOMETIMES reccomended that you might want to remove restrictions in the coolant flow (like a thermostat, or upgrade your cooling system). It physically transfers less heat away per liter of fluid. NPG+ also is less thermally efficient than water (which is why it gets up to temperature so much faster). This keeps hot spots from forming on the combustion chamber, which IS the #1 culprit for detonation. The reason NPG+ helps is that it doesnt boil off at "lower" temperatures. Ideally, if you could run your engine with 400F coolant temps you'd make more power, assuming it stayed together. Higher engine temps mean more thermal efficiency (as long as you dont detonate) and you get heat soak as a byproduct. LS1's never got reverse cooling, and GM ended up paying half a million dollars to Evans in 2003 when the case was closed. GM used this on LT1's - there was a lawsuit. The methods arent too complicated, but in the late 80's he designed a really good setup and it was his own "trade secret". ![]() Distilled water and Red Line water wetter should do a better job at keeping "coolant" temps lowest.įactoid #1 - Jack Evans was hired by GM to do some design work on reverse cooled engines. So how, exactly, does a PG coolant such as Engine Ice, outperform a regular EG coolant? If Engine Ice does in fact outperform EG coolants, why not run Peak Sierra which is also a PG coolant? Or am I wasting my money on a snake oil product and should I just run a normal EG coolant?I'm sure you have your reasons for not wanting to use Evans. I don't ride on paved tracks, and don't really need a non-toxic coolant. However, doing a bit of research, it seems like PG coolants run hotter than EG coolant, and the main advantage they offer is being non-toxic, and are not slippery (great for track). Since Evans is waterless I would assume it performs the worst, but I think the Maxima coolant is a regular EG coolant? Looking at the fine print, they say it outperforms their competitors, and lists Evans and Maxima. On the Engine Ice bottle, they make several claims, saying it will have better operating temps than their competitors, which was enough to convince me to run it. Recently I learned there were two types of antifreeze - Ethylene glycol, which is used in the vast majority of coolants (green, dexcool, G-05, etc, etc) and propylene glycol, which is used by Engine Ice, and also Peak Sierra coolant. I do slow speed, technical riding that involves lots of clutch work and little airflow so keeping my bike as cool as possible is the priority, with boilover protection a close second priority. On my dirt bike I've been running Engine Ice, but never really thought about why.
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