Evans waterless coolant

The Mecca Evans waterless coolant has come in various flavors over the years.
I tried the original system with the drier and no pressure cap. After dumping that $$$ a couple times for various reasons including cost I went to a conventional system.

That said

rich006 said

This is at idle after driving. 210 is consistent with what I see on the temp gauge while driving. Before the rebuild the needle would be consistently below the midpoint of the gauge, and now it's consistently near the high end. Once the engine warms up, the needle is quite steady in that spot regardless of driving conditions.

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Your observations are not out of line of what might be expected from the differnence in viscosity and heat transfer characteristics. The fact that the temps hold steady and are well within the accepted range indicates its working fine. 210 F is probably good with the waterless non-pressurized system. Its important that the propylene glycol remains moisture free and having the coolant up to water's boiling point will help insure that, especially since my understanding is they have eliminated the drier.