Good points, well taken. I have no ECU to worry about in my case, and like Olddog, I just blew off the whole reference to horse power saved via the cooling fan setting. Still, if your running an 18 wheeler, or even a high velocity fan clutch, that could be a good point. Or a diesel, which may get more benefit from higher engine temps than a gas engine would.
Olddog, my point about "water expansion" was that even a little "steam" from whatever source, can quickly raise the pressure and force water out of the system. There's more to that than just the water itself expanding. In fact I recently had a very very small head gasket leak from the combustion chamber into a water jacket that was doing just that! Blowing my water out like crazy, it was hell to figure out what was going on. The circumstances were such, complex to go into here, that I believe Evans would have been a good call during that mini crisis. Either way, I eventually did replace the head gasket and engine temps got pretty high at one point (thankful for those iron heads
). Often you can indeed overheat your engine to fairly high numbers without significant damage, sometimes you can't. Feeling lucky?
I have personal knowledge of folks, over the years, who have warped alloy heads due to overheating (it's actually quite common), and personal knowledge of folks who have been burned by pressurized systems upon sudden release of said pressure. While that may not be commonly reported among the Cobra clan, it is never the less, a valid concern. For your daily driver, your diesel truck or your Cobra.
I plan to increase my fan setpoint to a higher temp as well as possibly increase my t-stat to a higher temp. I want to try running a higher temp in general to see the results. I'm willing to take that risk, which I think is minimal.
At this point, other than the expense (no big deal to me) and the labor (I love doing this kind of stuff) I don't see a downside here.
As I mentioned earlier, I seriously wonder if Undy would have even noticed he had a problem or even had a problem at all, had he been running Evans and a low pressure cap. We hear of PLENTY folks on here with porous alloy engine parts. Those "leaks" may not be an issue at low or zero pressure. That potential intake or other gasket leak may never show up with low or zero pressure. Ya just might be protected and not even know it, in which case you would be saying, "I don't see any difference", when you don't even know there is!