[DeTomaso] Under car water pipes

[Kirby Schrader]

I've been intrigued by this thread. The subject of the Pantera cooling
system comes up time and again and it's kind of like the old dead horse
story...
Why are more people not implementing the system John Taphorn used on his
car? John was advised on how to do this by Mike Trusty (who has applied it
on Panteras, Countachs, Renaults, etc.) and the modification/design works.

Very successful, fairly easy to implement, no larger pipes required, etc.
etc.

I have done something very similar on my GT40 and it made a big difference.
It's even logical and makes sense from an engineering point of view. It's
the first thing I'm going to do to my Pantera when I get it back. I used a
different thermostat housing, but the result was the same.

The article John wrote can be found here.

http://www.spacecitypanteras.com/technical.html

Click on the 'new approach' link and the diagram to get all the info you
need.
The article was also published in one of the POCA magazines, but I forget
which one...

I hope this helps some.

FWIW,
Kirby



On Tue, Jun 23, 2009 at 3:17 PM, <JDeRyke at aol.com> wrote:

> History lesson: back in April 1980, a few weeks before we purchased our '72
> L, Armand Gosselin of Orlando FL converted his '72 Pantera from 1-3/8" OD
> cooling tubes to 2". He did the ENTIRE system, not just the long under-car
> tubes! With the help of a local MIdas Muffler shop, Armand had them bend
> replicas of all the water tubes in the car, also changing the radiator
> inlet and
> outlet spigots and the spigots on both water tanks to 2". He had some
> trouble opening up the underbody grommet holes and support block for the
> much
> larger tubes- there's not much metal left when you do this! He also had
> trouble
> getting the larger diameter 2" tube to wrap around the gearshift rod
> without
> rattling and rubbing. But he finally prevailed- see PI Tech Info Group 27,
> Article 10.
>
> The Pantera responded by running pretty much as it had before. Some time
> before the work was started, there was a long discussion as to the possible
> benefits, and one contributor said that it should make little difference
> because as the ID of the tubes increases, the speed of water flow decreases
> with
> the same pump & pulley, thus maintaining about the same flow volume. I
> can't
> find the discussion in P.I, but it turned out he was correct. And besides
> the water tubes, there are two other places in the cooling system where
> flow
> is restricted: the stock radiator and the thermostat (possibly by design).
> If those are not enlarged, all you've done with bigger water pipes is
> slightly increase the cooling system volume.
>
> An aluminum radiator with its 3X larger internal water tubes DOES increase
> the flow rate of water thru it, but the thermostat then remains as the
> primary impediment to higher water flow through our cooling systems. I'm
> working
> on that.... FWIW- J Deryke, defacto Historian
>
>
>
>
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