What we want to do is keep them wetted because liquid coolant carries a lot of heat away, when the coolant boils locally then not so much. The reason this is important as there are places inside the engine that are very much hotter than other places, specifically exhaust valve seats and sparkplug bosses. What your trading here is a generally higher operating temperature with a much wider margin between the coolant‘s boiling point and its operating temperature. With waterless you don’t get a phase change at atmospheric pressure till about 365 F, that means the internals are wet and at 240 you’ve got 125 degrees between being wet inside the jackets and absolute vaporous disaster where all the coolant pukes all over the place. 50/50 at atmospheric pressure is boiling at 223, with a 20 pound pressure cap that’s still only 265 so if your bulk temp is 240 with 50/50 there’s only 25 degrees to play with before your cooling system is all steam and alcohol vapor. I think you not appreciating what some of us are saying that: No you cannot run a cast iron engine at 365. The following are minimum radiator core suggestions:ģ00HP or less without AC.4 rows: ½” tube copper/brassģ00HP to 400HP with AC.2 rows: 1” tube aluminumĤ00HP to 600HP.2 rows: 1.25” tube, aluminumĦ00HP and above.3 rows: 1” tube aluminumĬlick to expand.So here is the response from Evans, it would be nice if they told you in advance, but I have the wrong Radiator for their product.

In general, Evans recommends single-pass radiators as they have less flow resistance than multi-pass radiators. Your system will most likely show better temperatures with as little antifreeze as needed for corrosion and freeze protection in Florida. To convert back to water based coolant just drain the system completely, reinstall your gutted thermostat and refill. Water pump drive ratio is overdriven that's good for the street. Also the 502 is notorious for running hot even with water based coolant. Our suggested radiator core size based on horsepower is below. This core design creates restriction and turbulence, This is due to copper tube size and the dimpled tubes. The radiator design you have is primarily for water based coolant and will perform best with 100% water.

Evans HP is a high volume type fluid, water based is high pressure and requires restriction. Engine oil should mirror the coolant temperature or less depending on the engine load and type of oil pan.Ĭurrent issues with the cooling system related to Evans HP and the high temperature range. 220° to 240° operating temperature is possable with Evans HP as long as the engine oil temperature is under control. The information supplied gives an indication of why you're seeing this increase. No it is not normal for that amount of increase when converting to Evans High Performance Coolant (HP). Your question about the 20 to 30 degree increase is exactly why the question about the cooling system. would be nice if they told you this in advance, Click to expand.You were correct, waste of money, I have the wrong radiator for the Evans.

Evans waterless coolant