I’d like to get rid of the air-pump but retain the
air-conditioner on my '88 V12 S3.
I’ve read the posts on removing the air pump and blocking
the air rails, etc. In order to keep the AC, I see 3 options:
Option A
Run an idler pulley instead of the air pump. I believe the
Euro cars had it. Called SNG, the rep had no info on it. Is
there a source for this and what is the going $ rate for this?
Kirby talks about using a Ford pulley in his book, but
provides no details. Any options for adapting parts from
other cars?
I have machinist buddies, so I suppose I can also get a part
made worst case.
Option B
Is is possible to run the AC compressor without an idler
pulley? How is ac belt removal and adjustment handled in
this case? Special bracketery?
Option C
Relocate the ac compressor to the air pump bracket and move
the alternator into the Vee. Kirby’s book talks about
someone that did this, it should entail a fair amount of
work with ac hoses and such. Good long term solution, any
threads here with additional detail?–
'88 XJ12 VDP, '97 993
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
Kirbert
(Author of the Book, former owner of an '83 XJ-S H.E.)
2
Kirby talks about using a Ford pulley in his book, but
provides no details. Any options for adapting parts from
other cars?
Big ol’ chunk of iron with a Ford pulley bolted to it. Not exactly
rocket science. I later replaced it with a CS130 alternator, much
neater installation, and ditched the OEM alternator.
Option B
Is is possible to run the AC compressor without an idler
pulley?
No. You need a belt adjustment scheme.
Option C
Relocate the ac compressor to the air pump bracket and move
the alternator into the Vee.
Works, but I just don’t see the point of going to so much effort.
Leave the A/C compressor where it is, put the alternator where the
air pump was. Helps to switch to a GM alternator, since they mount
similarly to the air pump mounting scheme. This plan also gets rid
of the original alt belt, and hence gets rid of any load driven
through the rubber in the crank damper. That’s a big plus IMHO.
– Kirbert
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !On 26 Sep 2014 at 14:04, TheWarlock wrote:
In reply to a message from Kirbert sent Fri 26 Sep 2014:
As advised by previous posts, just remove air pump and
everything associated with it and install another
alternator in it’s place.
Since I am not concerned with extra weight I have
replaced the air pump with a Powermaster 225
alternator and added a separate 12 volt circuit that
charges an additional deep cycle battery that runs the
fans, an inline electric water pump that charges the
suction of the mechanical water pump and a 1000 watt
120 AC inverter.
This leaves the original alternator and all it’s circuits
completely free to do it’s job without any of those
additional loads.
A 12 volt selector switch can then add a high degree of
reliability to the setup.
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
In reply to a message from Tomxjs sent Sat 27 Sep 2014:
Thanks Kirby
Holy smokes Tom, talk about a highly redundant
configuration. Did you work at Jaguar on the XJ12 design
team
While that level of complexity is not my direction, I’d
appreciate some pics of your engineering talent–
The original message included these comments:
replaced the air pump with a Powermaster 225
alternator and added a separate 12 volt circuit that
charges an additional deep cycle battery that runs the
fans, an inline electric water pump that charges the
suction of the mechanical water pump and a 1000 watt
120 AC inverter.
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
Kirbert
(Author of the Book, former owner of an '83 XJ-S H.E.)
5
Holy smokes Tom, talk about a highly redundant
configuration. Did you work at Jaguar on the XJ12 design
team
Were you around when we discussed water-cooled headlamps?
– Kirbert
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !On 27 Sep 2014 at 17:18, TheWarlock wrote:
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
Kirbert
(Author of the Book, former owner of an '83 XJ-S H.E.)
7
I believe it was all in jest, but someone really did bring it up as a
sarcastic response to some of the mods that people were considering
to their cars. It was probably on the xj-s list, not the v12-engine
list. Perhaps a search of the archives would turn it up?
– KirbertOn 27 Sep 2014 at 18:51, The Zar wrote:
You can’t be serious.
The original message included these comments:
Were you around when we discussed water-cooled headlamps?
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
In reply to a message from Kirbert sent Sun 28 Sep 2014:
Kirby I must have missed your headlight cooing musings
so bring me up to date with your shop drawings and the
desired range for operating temperatures as I do have
redundant capacities.
It is too tight to get any meaningful photos of the cooling
mods, as previously requested, but it is a Stewart EMP
558 ABK inline pump mounted in the lower radiator hose
from a BeCool radiator to the OEM mechanical pump on
a 6.0L V-12 that operates behind an Aston Martin DB7
shrouded twin electric fan set.
When inactive the electric water pump does not impede
coolant flow to any recognizable degree and is activated
by either coolant temp or engine RPM as programed.
This setup allows flexible coolant control under various
operating conditions and controls after shutdown heat
soak temps.
As to Jaguar experience I have been working on this
XJS coupe for a number of years in order to accumulate
some 230,000 pleasurable miles driving it.
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
In reply to a message from Kirbert sent Sun 28 Sep 2014:
Oh how I miss the forums.–
The original message included these comments:
I believe it was all in jest, but someone really did bring it up as a
sarcastic response to some of the mods that people were considering
to their cars. It was probably on the xj-s list, not the v12-engine
list. Perhaps a search of the archives would turn it up?
– Kirbert
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
