I have just bought a European Spec 1985 XJ-S V12 (British Import) down here
in Australia The interior and body are in good condition, the engine seems
a bit rough and in need of a tune up. It idles at about 250rpm. It has a
bit of a rattle on hard acceleration, but is quiet as a mouse at light
cruise. It was running just above the “N” mark after some hard driving.
The previous owner has been running on Leaded (96 RON). There are no cat
converters or oxygen sensors on the car. I would like to run on Premium
unleaded (96 Ron)and fit some oxygen sensors to get the benefits of the
closed loop system.
Do I need to add an octane booster to each tank to get the 98 RON
fuel used in England?
Is it worth while fitting oxygen sensors?
Where do the Oxygen sensors go, and how do I wire it up?
Is there any way to check whether it runs 12.5:1 compression or
11.5:1 compression
Currently the radiator is out getting rodded (PO used Bars Leaks and changed
the water every year). I was surprised by the amount of junk behind the oil
cooler as well - completely blocking the lower third. The distributor
comes out tonight for overhaul.
Iain Burgess
New Owner
85 V12 XJ-S Coupe*****************************************************************************
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Kirbert
(Author of the Book, former owner of an '83 XJ-S H.E.)
2
Is it worth while fitting oxygen sensors?
I’m betting the answer is no. I think you’ll have to buy a new
ECU, and there won’t be one readily available to operate a Euro-spec
engine with oxygen sensors, so you’ll probably have to have AJ6
Engineering build you one. Better part of a grand, I’ll bet – and
probably no measurable benefit except in tailpipe emissions.
Where do the Oxygen sensors go, and how do I wire it up?
They go in the downpipes, and they connect to the ECU via shielded
cables. You’d probably need to add those cables, too.
Is there any way to check whether it runs 12.5:1 compression or
11.5:1 compression
Tell us what the engine number is. It’s at the very rear end of the
V, just above where the tranny bolts on. You’ll probably have to
scrape crud off to see it. Somebody here will probably be able to
tell you the CR based on the engine number.
– Kirbert | Palm’s Postulate:
| If anything is to be accomplished,
| some rules must be broken.
| – Kirby Palm, 1979From: Iain Burgess Iain.Burgess@leicon.com.au
4/ Almost always The higher comp ratio. Can be checked by engine number
A well maintained car dosent benifit from closed loop systems; you have one
of the best spec combinations as it stands
Regards Don Miles
I have just bought a European Spec 1985 XJ-S V12 (British Import) down
here
in Australia The interior and body are in good condition, the engine
seems
a bit rough and in need of a tune up. It idles at about 250rpm. It has a
bit of a rattle on hard acceleration, but is quiet as a mouse at light
cruise. It was running just above the “N” mark after some hard driving.
The previous owner has been running on Leaded (96 RON). There are no cat
converters or oxygen sensors on the car. I would like to run on Premium
unleaded (96 Ron)and fit some oxygen sensors to get the benefits of the
closed loop system.
Do I need to add an octane booster to each tank to get the 98 RON
fuel used in England?
Is it worth while fitting oxygen sensors?
Where do the Oxygen sensors go, and how do I wire it up?
Is there any way to check whether it runs 12.5:1 compression or
11.5:1 compression
Currently the radiator is out getting rodded (PO used Bars Leaks and
changed
the water every year). I was surprised by the amount of junk behind the
oil> cooler as well - completely blocking the lower third. The distributor
comes out tonight for overhaul.
Iain Burgess
New Owner
85 V12 XJ-S Coupe
This email and any files transmitted with it are confidential and
intended for use by the Addressee only. The confidential nature
of the information contained in the email and/or file is not waived,
lost or destroyed if it is sent in error to other than the Addressee.
Use or dissemination of the information contained in the email
and/or files by a recipient other than the Addressee may cause
commercial damage to both/either the Sender and/or Addressee.
If you are not the Addressee of this email/files please immediately
contact the Sender and delete this email/files.