Old Library

Has anyone heard of the above coolant? I am wondering if
anyone has used it as I am considering switching to it.
Here is what I have found out so far so that anyone may
comment on it.

I first heard of this coolant from Per Shroeders's
'Volkswagen and Sport Tuning' book. I've done a little
research on it including corresponding with a Saab guy who
has done the conversion, and talking to Evan's main
distributor.

There is also a temporary website put up by the company at
http://www.evanscooling.com/

It is supposed to be straight propylene glycol and is
supposed to be more efficient than the standard ethylene
glycol that is more commonly available.

It seems to have many advantages, including more efficient
cooling and anti-corrosion (since there is no water in the
system). I am most interested in these two benefits since
having a more efficient cooling system allows the engine to
run with more advanced ignition timing and detonation is
also prevented. And since our VR6 engines seem to have
corrosion problems, the anti-corrosive properties of this
coolant might be helpful.

The cons are that it has a higher viscosity and hence if the
stock radiator and water pump do not have a high enough flow
capacity, it will end up being a worse solution than the
conventional cooling system. The guy I spoke to at Evan's
distributor said that he thinks the VW radiator is not
efficient (high-flowing) enough, and the thermostat may have
to be bypassed. Although he didn't seem to know that much
about our cars in the first place. He will be sending more
information soon so I will update the list when I get it.

Another thing, the freezing point is -75 degrees and the
boiling point is something like 370 degrees. Pretty
impressive.

Any comments? This might be the next killer mod if it is
easy to do and does all it says it does.

Eugene Oh
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<<Subject: [gti-vr6] Evans Cooling System's NPG Fluid [Long]

Has anyone heard of the above coolant? I am wondering if
anyone has used it as I am considering switching to it.
Here is what I have found out so far so that anyone may
comment on it.>>
SNIP

Hi Eugene,
The propylene glycol switch does work... with much modification and
compromises.  The coolant has a very high thermal reserve and wicks heat away
from the cylinder head effectively, permitting higher compression ratios, etc
without detonation.  However, the stock VW cooling system incorporates the oil
"cooler" into a bypass system.  The coolant flowing through the "cooler" does
not directly circulate to the radiator, but is channeled off the outlet
circuit of the engine and then directly dumps back into the intake side.  This
results in abnormally high gauge readings.  The few cars I tried it on
required bypassing the factory "cooler" altogether, which is not recommended.
The "cooler" is actually a warmer, bringing oil temps up to operating levels
faster.  Without the cooler bypassed, the coolant gauge eventually pegged,
rendering it useless.
The other downside is that the system runs at atmospheric pressure.  This at
first seems like a great thing, going far to extend the life of hoses, heater
core, etc., but the venting vapors smell like pancake syrup, and the smell is
constantly there when warm.
Another benefit is that this coolant is supposed to be biodegradable.
Unless you're thinking of boosting your compression ratio sky high, I don't
think this mod is worth it.  I ditched the idea a few years ago.
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Yes, I looked at it very, very closely when it was featured in
VW & Porsche several times.

It is, unfortunately, much more flammable than the regular stuff,
which is why is is dead as a mod.

I do wish someone would come up with a better coolant, though.
One would think with all the amazing chemical breakthroughs
we could do better...

Jud.

Eugene Oh wrote:

> Has anyone heard of the above coolant? I am wondering if
> anyone has used it as I am considering switching to it.
> Here is what I have found out so far so that anyone may
> comment on it.
>
> I first heard of this coolant from Per Shroeders's
> 'Volkswagen and Sport Tuning' book. I've done a little
> research on it including corresponding with a Saab guy who
> has done the conversion, and talking to Evan's main
> distributor.
>
> There is also a temporary website put up by the company at
> http://www.evanscooling.com/
>
> It is supposed to be straight propylene glycol and is
> supposed to be more efficient than the standard ethylene
> glycol that is more commonly available.
>
> It seems to have many advantages, including more efficient
> cooling and anti-corrosion (since there is no water in the
> system). I am most interested in these two benefits since
> having a more efficient cooling system allows the engine to
> run with more advanced ignition timing and detonation is
> also prevented. And since our VR6 engines seem to have
> corrosion problems, the anti-corrosive properties of this
> coolant might be helpful.
>
> The cons are that it has a higher viscosity and hence if the
> stock radiator and water pump do not have a high enough flow
> capacity, it will end up being a worse solution than the
> conventional cooling system. The guy I spoke to at Evan's
> distributor said that he thinks the VW radiator is not
> efficient (high-flowing) enough, and the thermostat may have
> to be bypassed. Although he didn't seem to know that much
> about our cars in the first place. He will be sending more
> information soon so I will update the list when I get it.
>
> Another thing, the freezing point is -75 degrees and the
> boiling point is something like 370 degrees. Pretty
> impressive.
>
> Any comments? This might be the next killer mod if it is
> easy to do and does all it says it does.
>
> Eugene Oh
> --
> For info on: how to subscribe & unsubscribe, the list's tech/how-to
>     library, etc.  see:   http://www.panix.com/~aqn/GTI_VR6/gti_vr6_list/

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	Has anyone heard of the above coolant?

Yes!  It was used on the awesome 2 liter 160 hp 8V "Lurching Towards
Success" Rabbit GTI years back in European Car (maybe it still was VW &
Porsche).  From what I remember the advantages of the system were what you
mentioned below.  Additional things I recall from the article were the
coolant system has to be remapped so that the flow was completely reversed.
This was to allow coolant to reach the cylinder head first to reduce
detonation and allow the car to run on the 11.5:1 compression with no ill
effects.  The other thing I remember them saying was the coolant
temperatures of the car (after the conversion) would be unusually high.
They claimed it was acceptable and wouldn't cause any harm, you just had to
get used to a temp gauge that always read high.  Other than that I've never
heard anything else about this coolant.

I think if it were as great as Evans Engineering claims it is, many, many
more people would have converted their systems to this setup.  After all it
has been out for several years now.

Just my $.02
Jeff
97 DE


I am wondering if
anyone has used it as I am considering switching to it.
Here is what I have found out so far so that anyone may
comment on it.

I first heard of this coolant from Per Shroeders's
'Volkswagen and Sport Tuning' book. I've done a little
research on it including corresponding with a Saab guy who
has done the conversion, and talking to Evan's main
distributor.

There is also a temporary website put up by the company at
http://www.evanscooling.com/

It is supposed to be straight propylene glycol and is
supposed to be more efficient than the standard ethylene
glycol that is more commonly available.

It seems to have many advantages, including more efficient
cooling and anti-corrosion (since there is no water in the
system). I am most interested in these two benefits since
having a more efficient cooling system allows the engine to
run with more advanced ignition timing and detonation is
also prevented. And since our VR6 engines seem to have
corrosion problems, the anti-corrosive properties of this
coolant might be helpful.

The cons are that it has a higher viscosity and hence if the
stock radiator and water pump do not have a high enough flow
capacity, it will end up being a worse solution than the
conventional cooling system. The guy I spoke to at Evan's
distributor said that he thinks the VW radiator is not
efficient (high-flowing) enough, and the thermostat may have
to be bypassed. Although he didn't seem to know that much
about our cars in the first place. He will be sending more
information soon so I will update the list when I get it.

Another thing, the freezing point is -75 degrees and the
boiling point is something like 370 degrees. Pretty
impressive.

Any comments? This might be the next killer mod if it is
easy to do and does all it says it does.

Eugene Oh
--
For info on: how to subscribe & unsubscribe, the list's tech/how-to
    library, etc.  see:   http://www.panix.com/~aqn/GTI_VR6/gti_vr6_list/