[DeTomaso] Ac compressor questions

[Kirby Schrader]

Tomas,

Of course...

In my case, I have a slightly bigger crank pulley than the one on the
compressor; hence the 4,500 limit.
:-)

Kirby

On Wed, Jul 13, 2011 at 11:10, Tomas Gunnarsson <guson at home.se> wrote:

> 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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