[Shotimes] RE: GEN II AC ... Can it Handle the Heat

[Leigh Smith]

Hi Pete;
My 94 SHO will put out 45F dash temps even in 95F heat.
But both my SHOs and the Ford minivan needed a little help to do that.
Even with a completely re-vamped ($1000) and charged system I was not
getting very cold air, maybe 58F at the dash.I was so mad I was ready to
sell the SHO.
I then found many Ford and aftermarket A/C temp cycling switches are set on
the high side of the Ford spec range, or even slightly above. This switch
set-point needs to be blue-printed by you, on the low side of the factory
spec, for really cold A/C. The spec is 22-28psi. I tested four all pre-set
at 28-30 psi, and 3 were brand new.
The switch is located on the accumulator. Pull the connector and you will
see a screw. It is adjustable although that is not documented in Helms.
With a guage attached, adjust the screw until the compressor will pull the
pressure down to 20-21-22 psi before tripping the switch and cutting the
compressor off. It can make a 10F difference at the dash.
..
The low side setting controls how cold the system gets and is there
partially to prevent the evaporator from freezing up. I tested that as well
and even with settings as low as 17psi and the evaporator was still several
degrees above freezing. I think this is because the SHO has the accumulator
mounted on the radiator support and the SLO has it mounted on the firewall.
The SLO switch is much closer to the evaporator, where-as the SHO lines can
pick up a little engine heat before they travel 4 feet and get there, so I
think the SHO switch needs to be set a little lower to compensate. This same
trick on the minivan had much less effect because the switch & accumulator
are mounted on the firewall. It made a tremendous difference on my 89 SHO
(R-12) but also helped my 94 (R-134).
Lee

----- Original Message ----- 
From: "Al & Angela" <aa4jc1@netzero.com>
To: <shotimes@autox.team.net>
Cc: <gtsrider@yahoo.com>
Sent: Thursday, July 28, 2005 7:42 AM
Subject: [Shotimes] RE: GEN II AC ... Can it Handle the Heat


> Hi Pete
> Sorry to hear about that.
>
> I live in SC it has been 95-98 degrees w/ heat index in the 100s.
> My a/c is cold, all orig. parts except a/c clutch.
>
> I do remember when I had my a/c clutch installed the techs forgot to
connect
> some electrical connection on/around the compressor.  My a/c wasn't
running
> well until that was corrected.
>
> Wish my house a/c was as cold as my SHO :)
>
> Al
> 94 ATX
> 129K mls
> http://www.saenzartworks.com
>
> -----Original Message-----
> Message: 4
> Date: Wed, 27 Jul 2005 14:06:14 -0700 (PDT)
> From: Peter Maggiacomo <gtsrider@yahoo.com>
> To: shotimes@autox.team.net
> Subject: [Shotimes] GEN II  AC ... Can it Handle the Heat?
>
> Just got my 95MTX back with all new AC, and it's back
> in the shop. Why?  Customer (me) dissatisfaction.
> It just does'nt seem cold enough, but maybe it's me
> and this KILLER heat wave across the country.
> It's always hot in the summer in Florida, but this
> summer is a scortcher! If anyone out there has a GenII
> AC system they feel is running tops, how does it
> handle this mid 90's - triple digets heat? Thanks.
> -Pete
> Sweating In My Sho In Tampa
> -----END-----
>
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