I stand by my comments, bro. ;>)

We are not driving racers, we are driving waterboxers with congenitally poor
water circulation in their cylinder heads.

If YOU want to run water as a summer coolant, that's fine - but there are
new listees here who cannot judge advice for technical merit.

They are advised to "stick with the program" of using the regular approved
coolant as recommended by VW.

Marshall Ruskin

> Not so mon frere!
>
> Racers use water mixes, and for years only alcohol was added as a freeze
> protector.  The boiling point is raised by the pressure in the system as
> well.
>
> Water is simply the best heat transfer medium.
>
> See the link to Hypercool on the http://no-rosion Web site for a
> discussion of this, and Hypercool is definitely a product for desert
> dwellers to consider.
>
>
> Marshall Ruskin wrote:
> >
> > I strongly disagree with the advice you present for desert Listees. It
is
> > incorrect advice, and should not be followed.
> >
> > If a listee used straight water, even with wetting agents in a hot
climate,
> > they would cerainly have boil overs because the coolant will definitely
boil
> > in the heads, when they slow down or stop. Perhaps boil when driving -
> > causing a loss of coolant or worse.
> >
> > Anti-freeze not only lowers the freezing point, it also very
significantly
> > raises the boiling point of water.
> >
> > > --
> > > Stuart MacMillan
> > > Seattle
> > >
> > > '84 Vanagon Westfalia w/2.1
> > > '65 MGB (Daily driver since 1969)
> > > '74 MGB GT (Restoring sloooowly)
> > >
> > > Personal mechanic for:
> > > '70 MGB GT (Daughter's)
> > >
> > > Assisting on Restoration (and spending OPM):
> > > '72 MGB GT (Was daughter's, now son's)
> > > '64 MGB (Son's)
> > >
> > > Stripped and gone but their parts live on:
> > > '68 MGB, '73 MGB, '67 MGB GT
> > >
>
> --
> Stuart MacMillan
> Seattle
>
> '84 Vanagon Westfalia w/2.1
> '65 MGB (Daily driver since 1969)
> '74 MGB GT (Restoring sloooowly)
>
> Personal mechanic for:
> '70 MGB GT (Daughter's)
>
> Assisting on Restoration (and spending OPM):
> '72 MGB GT (Was daughter's, now son's)
> '64 MGB (Son's)
>
> Stripped and gone but their parts live on:
> '68 MGB, '73 MGB, '67 MGB GT