These effects can be eliminated by installing a Combex reciprocating pump.
I believe that they can be ordered through JC Whitney.  If I'm not mistaken,
they advertise a 15 - 20% increase in fuel economy.

Karl Wolz

----- Original Message -----
From: "Frank Miller" <fmiller01@sprynet.com>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, July 13, 2000 5:23 AM
Subject: Re: Weep No More For Me

> Fine, but what about the inertial effects on the water depending on the
> velocity of the van or whether the van is going forward or in reverse?
> Hurry up Friday!
>
>
> At 10:50 PM 7/12/00 -0400, Karl F. Bloss wrote:
> >> based on the original poster's assumption that the water pump has to
work
> >> relatively hard to pump coolant uphill, would it do less real work if
> the van
> >> were constantly driven downhill?
> >
> >Forget differential equations.  If it's a closed non-leaking system, it
> doesn't
> >matter how the van is facing, the waterpump is only overcoming the
frictional
> >losses in the system, not pumping up or down.  I.e. the more piping, the
more
> >friction, the more the pump has to work.
> >
> >Uphill and downhill don't matter because the starting and stopping point
for
> >the fluid is the same.  If the van is facing downhill, for every unit
mass of
> >coolant that's going downhill, another unit mass is going uphill and vice
> versa
> >if it's pointing uphill.
> >
> >-Karl
> >
> >Karl & Kristina Bloss, Trexlertown, PA - '87 Weekender "Bev" - 199K Miles
> >http://www.enter.net/~bloss/vw - vanagon@makarov.com
> >VW Shop List: http://www.enter.net/~bloss/vw/vwshops
> >PA/NJ/DE/MD area VW bus "group" http://www.enter.net/~bloss/vw/pavanagon
> >Red Hat LINUX 6.2 - for IQs higher than 98
> >
>