[TR] Anyone use or know of: Evans NPG+ coolant?

[spook01]

" The NPG is more viscous (so
doesn't flow as well unless you upgrade the pump), and has less heat 
capacity (so doesn't cool as well unless you upgrade the pump and 
radiator)."

uhhhh, no.
I run the stuff in several cars, including some with thermo-siphon systems. 
I use it in the diesel suburban that I use for towing, as well.
I found a drop in temp, generally.  (also you should be aware that running 
slightly warmer, say 200 to 210 increases efficiency of the engine.)
pure ordinary antifreeze (ethylene glycol) has a lower boiling point than 
the NPG (propylene glycol). generally, the ordinary anti freeze begins to 
breakdown 2300 - 2500F.  the npg is a zero pressure coolant, boiling at 
around 375 (at sea level pressure) and is stable at that temp.
if you want a thinner product they have npg-r which is about the viscosity 
of water. as I say, I have had no trouble with the standard npg.
and don't own stock.....

Best,
Ray

----- Original Message ----- 
From: "Randall" <tr3driver at ca.rr.com>
To: <triumphs at autox.team.net>
Sent: Monday, May 18, 2009 4:33 PM
Subject: Re: [TR] Anyone use or know of: Evans NPG+ coolant?


>> Does anyone on this list know of this product or have first hand
>> experience with it?
>
> The topic has come up from time to time over the years, we were just
> debating it the other day on the Stag list.  The NPG is more viscous (so
> doesn't flow as well unless you upgrade the pump), and has less heat
> capacity (so doesn't cool as well unless you upgrade the pump and 
> radiator).
> Yeah, it probably won't boil, but your engine WILL run hotter.
>
> BTW, you can do the same thing with pure ordinary antifreeze (even higher 
> BP
> than NPG).  I tried that on a TR3A, many years ago ... a year later the
> engine swallowed a valve and spit most of #3 cylinder out the tailpipe. 
> In
> that case, I believe extreme lean mixture at cruise was the cause of both
> the persistent overheating, and the valve stem eroding until it broke.
>
> Especially since I wound up spending my Christmas break lying in the snow
> repairing the damage, it's not an experience I care to repeat.
>
> As someone already mentioned, my first thought would be the voltage
> stabilizer, followed by the accuracy of the gauge.  But no matter what the
> problem, I would recommend finding and fixing it, rather than trying to 
> put
> a band-aid over it.
>
> -- Randall
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