Jaguar World Monthly Forum - Weber kit for E Type V12 + XJR-S 6 litre engine

carlv12

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Weber kit for E Type V12 + XJR-S 6 litre engine
19.05.2009 at 19:46:17

Hello,

I have the chance to buy a very fine XJR-S 6 litre with only 40.000
miles and I dream of fitting it with 6 Webers on my 1972 Jaguar E
Type V12 Roadster with 4 speed manual gearbox. I already have
uprated with AJ6 TT Super Sport exhaust, polybushes, Konis etc..
The XJR-S engine has a big parts availability problem with Zytec etc.. AND: I already have 2 x Jaguat XJ-S V12 and 1 x Jaguar XJ 5.3 C. So
3 fuel injected cars are ok, for the E type I prefer a more ''racing'' feeling, raw, loud, thirsty...

The XJR-S engine that I could buy comes without the fuel injection components and without the distributor, but for a very good price!!! (around 1400 GBP). I already have the sausage type air filters for the Weber-kit. I hope that anyone has done this conversion (it does not matter if with 5.3 or 6.0 engine)

Who has experience or ideas for me concernung this modification. I
live in Valencia, Spain and here nobody has done this before...

Here is a video of Jay Leno's E Type V12 with WEBERS!!!

http://www.jaylenosgarage.com/video/video_player.shtml?vid=1088821

I hope you can give me good advices
Thank you and best regards from Spain
Carlos
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« Last Edit: 20.05.2009 at 15:33:05 by carlv12 »

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WDRV12

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Re: Weber kit for E Type V12 + XJR-S 6 litre engine
Reply #1 - 22.05.2009 at 02:46:36

Er have a look at this ! http://www.kelsey-forums.co.uk/cgi-bin/jwm/YaBB.pl?num=1233100335/30 ;

We build possibly 2 Webered power v12's a month at the moment and I think now we have carried out over 120 examples of this configuration .

You may like this http://www.youtube.com/watch?v=3w0C99puT70 ;
Clients car built by us in the late '80's still going strong some 20 years later.

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www.wolfdirectracing.com&&1992 Daimler Double Six S111&&1988 Jaguar XJ12 S111&&1988 Jaguar XJS HE Cab&&1987 Jaguar XJS HE&&1985 Lister XJS&&1974 Jaguar V12 E-Type Roadster&&and a few others ..

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carlv12

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Re: Weber kit for E Type V12 + XJR-S 6 litre engine
Reply #2 - 22.05.2009 at 15:43:39

I am very happy to get a positive feedback concerning this Weber conversion. Normally all people recommend NO to go this way. I can imagine that adjustment and tune up will be difficult and the engine never will run as smooth as EFI does. But for me the E Type can be an "old school" car with raw and harsh feeling, with some hot spots, but amazing every time I hear the engine running!!!

Every detail about the conversion is important for me at this moment.
Thank you and best regards from Valencia
Carlos

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WDRV12 Senior Member Offline Beccles Suffolk Posts: 394 Beccles Suffolk Gender:	Re: Weber kit for E Type V12 + XJR-S 6 litre engine Reply #3 - 22.05.2009 at 22:48:16 Pleasure to be of help ,
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WDRV12 Senior Member Offline Beccles Suffolk Posts: 394 Beccles Suffolk Gender:	Re: Weber kit for E Type V12 + XJR-S 6 litre engine Reply #4 - 22.05.2009 at 22:50:21 And another .....
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carlv12 I've just arrived Offline Posts: 9 Gender:	Re: Weber kit for E Type V12 + XJR-S 6 litre engine Reply #5 - 23.05.2009 at 10:33:57 So may pictures of Jaguar V12's with Weber show me that this conversion MUST work!!! And it looks go great. What are your experiences and advices? Thank you and best regards from Valencia P.S. I will post pics of my Jaguars... Here goes the first... Carlos
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carlv12 I've just arrived Offline Posts: 9 Gender:	Re: Weber kit for E Type V12 + XJR-S 6 litre engine Reply #6 - 23.05.2009 at 10:40:15 And both XJ-S V12... One is a 1991 Le Mans (one of 280 built) with 7x16 dished Dayton wire wheels and 225/55 R16 + 1" front and 7/8 rear anti roll bar, AVO springs and dampérs (even height adjustable with coilover at the rear) TWR exhaust, substitute pipes from AJ6 and much more...
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carlv12 I've just arrived Offline Posts: 9 Gender:	Re: Weber kit for E Type V12 + XJR-S 6 litre engine Reply #7 - 23.05.2009 at 10:43:35 the other is my favourite pic of my 1988 XJ-S V12 with AJ6 TT exhaust, 7x15 dished Dayton wire wheels with 235/60 R15, anti roll bars, Bilstein-TWR springs+dampers and much more....
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carlv12 I've just arrived Offline Posts: 9 Gender:	Re: Weber kit for E Type V12 + XJR-S 6 litre engine Reply #8 - 23.05.2009 at 10:52:56 and my 1976 XJ 5.3 Coupé. With Fortecs 7x15 wire wheels with 215/70 R15, AVO dampers and springs, modified exhaust and a lot of improvements... I love this car!!!
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mabjag Senior Member Offline Posts: 332 leicestershire Gender:	Re: Weber kit for E Type V12 + XJR-S 6 litre engine Reply #9 - 23.05.2009 at 21:03:12 Your E-type looks stunning Carlos and after watching WRD's youtube clip I just need to raise about 3 large for the conversion kit for my V12 E-type. The Webers certainly look neater than the 4 strongbergs Matt
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carlv12

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Re: Weber kit for E Type V12 + XJR-S 6 litre engine
Reply #10 - 24.05.2009 at 16:46:29

Hello,

I have ordered the Weber kit and alreay bought the XJR-S engine!!!!! Grin

Then converting my 4 speed manual E Type V12 to the 6 litre XJR-S engine + Webers, I must consider the following modification points, right?

1) the oil sump from E Type or even more modifications?
2) water pump from XJR-S or E Type?
3) oil filter from XJR-S?
4) spark plugs from XJR-S or E Type?
5) a high pressure recirculating fuel pump or the regular E Type one (part number or which one to buy?)
6) modifications to the bellhousing attchments?

Thank you and best regards from Valencia.
Carlos

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WDRV12 Senior Member Offline Beccles Suffolk Posts: 394 Beccles Suffolk Gender:	Re: Weber kit for E Type V12 + XJR-S 6 litre engine Reply #11 - 25.05.2009 at 19:48:30 Ok quite a bit more than just sump, you also need to modify or change over either the front timing cover or modify yours ...see pic below
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WDRV12 Senior Member Offline Beccles Suffolk Posts: 394 Beccles Suffolk Gender:	Re: Weber kit for E Type V12 + XJR-S 6 litre engine Reply #12 - 25.05.2009 at 19:52:52 as V12E is like this !
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Re: Weber kit for E Type V12 + XJR-S 6 litre engine
Reply #13 - 25.05.2009 at 20:01:17

Water pump will have to come from the V12E as will oil filter and blanking plate on the side of the block you will need from the e-type.
The water rails also need to come from the e-type but remember the XJRS has METRIC bolts so you must use these bolts and NOT the bolts from the V12 e . The Block is NOT metric thread but the heads are !!!!

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WDRV12 Senior Member Offline Beccles Suffolk Posts: 394 Beccles Suffolk Gender:	Re: Weber kit for E Type V12 + XJR-S 6 litre engine Reply #14 - 25.05.2009 at 20:04:21 Blanking plate on V12E
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WDRV12 Senior Member Offline Beccles Suffolk Posts: 394 Beccles Suffolk Gender:	Re: Weber kit for E Type V12 + XJR-S 6 litre engine Reply #15 - 25.05.2009 at 20:07:18 Oil filter assy on XJS etc !
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Re: Weber kit for E Type V12 + XJR-S 6 litre engine
Reply #16 - 25.05.2009 at 20:18:56

Plugs are going to be XJRS as these are both smaller and a totally different heat range !!! Try and get some platinum tipped NGK they work wonders

You will need all this aswell from the V12E :
Engine mountings
Alternator brackets
dowels and drill bell housing points on block
remove GM dowels (from 6.0)
Distributor (unless your using the one from the 6.0)
Water rails and pipes
jackshaft cover (unless you use (as we do) the 2 breathers on the back
internal oil pipes in sump
modify oil pump to accept the above
amplifier and wiring loom
water temperature sensor
and a couple of others

Its about a weeks work to convert but well worth the effort Grin

P.S. Love the other cars mmmmmm yummy XJS's Tongue

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carlv12

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Re: Weber kit for E Type V12 + XJR-S 6 litre engine
Reply #17 - 16.03.2011 at 23:36:42

Hello Richard and all others,

finally I have rebuilt my original E Type with new pistons and liners, all valves etc... = the really big thing!!! The XJR-S engine had a failure and I could send it back and get back my money...

Now my E Type V12 Roadster is still at my mechanic - we are converting the car to 6 Weber carbs with the "sausage" style foam air filters from Ramflo.
I have tried to follow all experts advices: lowering the engine (engine mountings), putting shims to the hood to gain clearance and AIR under the bonnet. I have changed the "poor working" retard vacuum unit from E Type V12 and fit the advance vacuum unit form XJ-S H.E. together with the DAB113HE distributor conversion kit from SNG Barratt. But the car still missfires sometimes when starting and accelerating. And today happened what I hope would never happen: one carb missfired and its foam air filter fired!! My mechanic immediately could extinguish the fire and we cannot understand how the foam air filter material is NOT fire resistant or incombustible!!!!! Now my mechanic will fit an air mesh filter made of 2 or 3 coatings or layers of a colander or sieve metal material that filters the air, but cannot catch fire. (I hope you understand my english...)
My mechanic wants me to ask the experts or people with experience in Weber V12 conversion how to avoid the miss firing: should we try even more ignition advance? Because at around 30 degrees of advance the missfiring never happens, but so much advance is not normal. Change spark plugs, try with another distributor cap and rotor, even other spark leads? Please give me ideas or advice.
This was a shock for me.....
Thank you and best regards from Valencia
Carlos

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