Please can anyone give advise on th ebest method to adopt.
Thanks in anticipation.
--
Geoff Sharples
Geoffrey Sharples <LPL...@geesharp.demon.co.uk> wrote in article
<2kNhZCAZ...@geesharp.demon.co.uk>...
I run a 'G' reg XJS V12 which runs on either 4* or unleaded - (it says this
on the fuel filler lid). Doesn't seem to make any significant difference
which fuel I use to either the performance or the economy. I don't believe
much changed between 1987/8 ? and 1990. Both are pre-catalytic convertor
models with fuel injection rather than carbs. I could be wrong though....
Regards,
Steve.
Hi Nigel,
I have a 1988 XJS.
I rang Owens in Ipswich, they asked for my engine & body No.
Then said that I can run on super unleaded without any changes.
If you are still concerned do the same.
Regards John.
Geoffrey Sharples wrote:
> I've recently acquired an E reg XJS which runs on leaded petrol which is
> not meant to be available after Jan1 2000. It has been suggested that I
> just switch to unleaded premium fuel or I can have the timing retarded
> losing performance en route or I can have a conversion.
>
--
Jack Kevorkian for White House Physician.
richard evans wrote in message <37184009...@katsika.clara.co.uk>...
Goodness me. I wonder where they found new sidevalve blocks from?
--
Dave dave....@NOSPAMargonet.co.uk
(remove NOSPAM to reply)
Alan
In article <na.35a0d348f4.a...@NOSPAMargonet.co.uk>,
dave....@NOSPAMargonet.co.uk says...
I /think/ they used Ital 1.3 engines, and changed the heads for new ones
after each test. IIRC.
Nigel Cliffe wrote in message ...
>In article <2kNhZCAZ...@geesharp.demon.co.uk>, Geoffrey Sharples
><LPL...@geesharp.demon.co.uk> wrote:
>
>> I've recently acquired an E reg XJS which runs on leaded petrol which is
>> not meant to be available after Jan1 2000. It has been suggested that I
>> just switch to unleaded premium fuel or I can have the timing retarded
>> losing performance en route or I can have a conversion.
>>
>> Please can anyone give advise on th ebest method to adopt.
>> Thanks in anticipation.
>
>
>Suggest you talk to at least two Jag specialists, but I thought that all
>Jags for the last 20+ years could run on unleaded without any major work.
>(If I'm correct, then anyone quoting for hardened valve seats is trying it
>on). They'd have needed hardened valve seats for the US market, which has
>been unleaded for ages.
>
>You may have to adjust the timing a little, or consider using
>super-unleaded instead of 4-star (I understand that the duty on
>super-unleaded is supposed to fall later this year to compensate for the
>loss of 4-star).
>
>The other option is unleaded plus a 'lead substitute & octane booster'. One
>such product (add a cupful to each gallon of petrol) passed some
>independent classic car tests recently, protecting against valve-seat wear
>and raising the octane level.
>
>
>- Nigel.
>
>--
>Nigel Cliffe, BT Labs, Martlesham.
> check the reply address for garbage
Or look at a range of websites such as those from the Advertising
Standards Authority, or the Australian Triumph-owners' club, where
you'll find plenty of evidence that the "in line fuel catalysts"
don't work, and the promoters of such things can't produce evidence
of *how* they could work....
Try:-
http://www.asa.org.uk/adj/adj_2483.htm
http://www.asa.org.uk/adj/adj_3320.htm
http://consumer.org.nz/whatsnews/4july97.html#fuel
http://www.foxall.com.au/tccv/fuelstar.html
Likewise recent tests by the FHBVC, where only two "in-line"
catalyst-sellers were prepared to put their products forward
for the test. Both failed, BTW...
You're better off spending your money on a proper set of
hardened valve-seats...
//PJML//
But they offer a 'guarantee' so you can't possibly loose. Or not. 90days or
3,000 miles, which even an 'A-Series' will manage on 'lead memory'.
Interesting to read their installation instructions. If fitted in
conjunction with a reconditioned cylinder head with freshly reground valves
and seats, the engine must be run on 4-star for 1,500 miles before using
unleaded. I wonder why................