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XJS engine conversion and a tune up

boyan
Posts: 3003
Joined: Thu Dec 29, 2011 6:45 pm
Location: Buckinghamshire UK
Contact:

Re: XJS engine conversion and a tune up

Postby boyan » Mon Jun 29, 2015 11:04 pm

What a bad day today with this car again today, i was of to the air con specialist when i overtake a learner car on a country road just to see
the man in blue standing on the middle of the road and pointing at me where to park ! :x :x so i did ....First thing hi had a go at me for overtaking the leaner car, witch i explained that there's nothing dangerous or reckless that i did ..hi just didn't like the power of that engine it was obvious ....
then hi booked me for not wearing the seat belt , 60 pounds then hi booked me for no mot ! 100 pounds witch i didn't know that it has run out then i had to blow for drugs and alcohol witch i don't consume :roll: then hi let me go and I've been told that i can only take the car back home on the shortest root and take the car to the mot station only if mot has been prebooked so i got the car home got the mot done with in the next 2 hours and im 200 pounds lighter from this after noon alone :lol: what a day !
Image

MagicDoormouse
Posts: 20177
Joined: Sun Apr 08, 2012 10:37 am

Re: XJS engine conversion and a tune up

Postby MagicDoormouse » Mon Jun 29, 2015 11:19 pm

Are you in Germany Boyan? ;)
1990 Sovereign (Brian)
1994 Sovereign Silver
1993 Daimler (Parkhouse)
1990 XJR Solent
1993 Daimler Double 6
1993 XJR Flamenco
1991 XJS V12
1976 Capri 3.0 V6

boyan
Posts: 3003
Joined: Thu Dec 29, 2011 6:45 pm
Location: Buckinghamshire UK
Contact:

Re: XJS engine conversion and a tune up

Postby boyan » Mon Jun 29, 2015 11:39 pm

:lol: The way i got jumped for a minute i tough i was :roll: looks like they have been taking some training there after all ......im not taking NUM out till sun is about ! that's for sure ........
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MagicDoormouse
Posts: 20177
Joined: Sun Apr 08, 2012 10:37 am

Re: XJS engine conversion and a tune up

Postby MagicDoormouse » Mon Jun 29, 2015 11:44 pm

Wise decision!
1990 Sovereign (Brian)
1994 Sovereign Silver
1993 Daimler (Parkhouse)
1990 XJR Solent
1993 Daimler Double 6
1993 XJR Flamenco
1991 XJS V12
1976 Capri 3.0 V6

naki_k
Super Moderator
Posts: 28617
Joined: Sun Feb 21, 2010 9:25 pm
Location: Kirton, nr Boston, Lincolnshire

Re: XJS engine conversion and a tune up

Postby naki_k » Tue Jun 30, 2015 2:20 am

Would it be better having trade plates, to avoid some troubles? Though wing help the no seat belt ticket!
88 3.6 XJ6 PDH/CEM
90 Range Rover Vogue SE 3.9 V8 LPG
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
93 3.2s - 4.0 Manual conv
93 4.0 Sovereign
93 6.0 XJ81 DD6 x2
93 6.0 XJ81 XJ12
94 4.0 XJR
94 4.0 Daimler
96 4.0 X306 XJR
96 4.0 X300 D6
97 4.0 X300 Sport Manual
2000 LR Discovery ES TD5 A
Breaking 40/ 300

Starbuck
Snr Member
Posts: 681
Joined: Thu Mar 19, 2015 4:48 am
Location: Melbourne, Australia

Re: XJS engine conversion and a tune up

Postby Starbuck » Tue Jun 30, 2015 3:50 am

Hi Boyan,

As I said in my post, because your car is a six cylinder it should have a 16mm rear bar and a 22mm front bar, so I am not surprised it already has a rear bar fitted.

If you decide to fit a heavier duty front bar you should uprate the rear bar as well, otherwise your XJS will want to push the nose wide on corners (understeer). The main reason for removing the rear bar on the V12s in the early 80s was to deliberately make them understeer - considered the 'safer' handling option for a certain country where law-suits against car manufacturers are common - but for most people who like to drive their cars more 'enthusiastically' they like them better balanced.

Best,

Starbuck
'94 XJ12 (and other toys)

MagicDoormouse
Posts: 20177
Joined: Sun Apr 08, 2012 10:37 am

Re: XJS engine conversion and a tune up

Postby MagicDoormouse » Wed Jul 01, 2015 1:19 pm

If I remember correctly Starbuck, there was only a 16mm rear bar available from Jaguar and that covered all models. I have a fuzzy recollection of an 18mm bar coming to market in the early 90's but where from the Lord only knows?
1990 Sovereign (Brian)
1994 Sovereign Silver
1993 Daimler (Parkhouse)
1990 XJR Solent
1993 Daimler Double 6
1993 XJR Flamenco
1991 XJS V12
1976 Capri 3.0 V6

krakenfelt
Posts: 4
Joined: Wed Jun 12, 2019 3:44 pm

Re: XJS engine conversion and a tune up

Postby krakenfelt » Wed Jul 10, 2019 1:57 pm

Hi boyan, I see you mentioned you put the 4.0 aj6 into the 3.6, I’ve just done the same thing, with a getrag 290 too. After feeding the loom through the firewall I’ve noticed that the yellow socket doesn’t marry up to the factory 3.6 one.
Any idea how to connect it all up? FYI I have a xj40 manual ECU. Any help much appreciated, I feel like it’s a small hurdle after what has been a big job for me, yet am totally baffled by electrics...