[DeTomaso] Ac compressor questions

[Tomas Gunnarsson]

If those rpm figures are compressor rpm the gearing crank to compressor has
to be taken into account too.

Tomas

-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of Kirby Schrader
Sent: den 13 juli 2011 17:39
To: boyd casey
Cc: De Tomaso List
Subject: Re: [DeTomaso] Ac compressor questions


I can attest to the rpm limit.  I went through three Sanden compressors and
then the guy asked me...
What rpm are you turning? I replied 7,000.
Well, no wonder you're having problems! They aren't supposed to be turned
over 5,000.
So now I have the ECU disengage the compressor clutch when rpm goes over
4500.
No problem since with the compressor.

FWIW,
Kirby

On Wed, Jul 13, 2011 at 10:19, boyd casey <boyd411 at gmail.com> wrote:

> The Sanden 508   reportedly  has issues above 5000 rpm, after viewing
> Sanden's web page
>  (http://www.sanden.com/index.php?tag=U5H0AMX7Q )
> I saw that they have some more advanced designs with internally controlled
> pressure valves, variable displacement and max operating rpm of 8000. Does
> anybody know if any of the more advanced designs can be used in the
> Pantera?
> I have heard anecdotal stories that the Pantera equipped with the Sanden
> 508
> and R134 was still not terrible effective at cooling the car in very hot
> weather or when the car is operated at high speed. I know the vacuum
> created
> at the back of the car at speeds in excess of 70 mph is responsible to a
> great degree in the difficulties faced at high speed operation and can be
> remedied by moving the condenser to the front of the car but the prospect
> of
> a more efficient, higher capacity compressor with built in pressure
control
> and higher max rpm operating range is appealing. Any information on using
> other compressor models would be appreciated.
> Boyd
>
> P.S.
>  Why do they refer to the Sanden AC compressor as "Rotary" when it is in
> fact piston operated?
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