Well,,,, I ran into a bit of a snag from what I learned during SAAC-35. More than a few people there were running Evan's coolant and having nothing but good things to say about it. I also ran into a fellow who could not bring his 427 FE, his surge tank sprung a leak due to pressure in the system. HE was all ears as several of us talked about the benefit's of a low pressure system and you can do that (instead of buying surge tanks) with Evans!
The snag: I have NPG+, which is not "officially" recommended for copper/brass radiator systems because the tubing is smaller than is found in aluminum radiators. NPG+, the fear is, is two fold.
1. It won't circulate as well as the thinner NPG-R.
2. It does not have as great a heat capacity as NPG-R.
In either, or both cases, you could find yourself running higher than desirable engine coolant temps.
NPG-R is recommended to change/flush yearly (aint gonna happen, WAY to expensive to replace). NPG-R also does not have a low freezing temp point, it turns to "un-pumpable" slush in a very cold climate (Michigan?).
Bottom line is NPG-R isn't what I want to use, so, I'm going in with NPG+ and we'll see what happens!
There is little doubt my engine temps will be hotter than running straight water. I have run both water and
antifreeze mix before. Clearly, nothing cools as well as water alone.
So how hot is TO hot? I think the typical "hotness" numbers we see are based on water systems with it's 212 boiling point, and it tendency to turn to steam around the combustion chambers. These temps are NOT based on what an engine can tolerate, or even "like" as far as temp goes. Studies have shown increasing the engine temp well above what we used to consider "normal" can increase performance, mpg, emissions, etc. Indeed, we limit engine temps to parameters that WATER can work within, not the engine itself.
Engine
oil is still a valid concern, we do not want that to get to high. And that number is???? I was running about 110-115 C at SAAC-35, no
oil cooler. My water temp's, after 6 or 7 laps were 235-240 degrees. I WAS loosing water!!! It was blowing it right out of the surge tank into the overflow tank and then onto the ground. Motor ran and still runs terrific by the way...
Anyway, perhaps by this weekend I'll get around to dumping the straight water and going ahead with the Evans. BUT, I won't really really know how it works until I hit a BIG track again and really push everything to the limit.
...what a nightmare returning from SAAC-35. My dogs killed the neighbors cat while I was away and pretty much all hell broke loose around here as a result. Not being a cat lover my first thought was: Dogs 1, Cats 0, and that's a problem??
1Likes
Threaded Mode
