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XJ12C manual conversion (Read 2772 times)
Jacqueline
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Re: XJ12C manual conversion
Reply #15 - 08.11.2011 at 19:27:41
 
Gearing is always a nightmare. Had a chat to a guy in a local pub car park yesterday evening. He had bought that day a beautiful black 56 plate Ferarri 599 same day. 14K on clock but had developed a fault with what the RAC bloke who was playing about with defined as a gearbox differential problem. Ralph tells me gearbox and differential are in no way related so not sure what was up with it.

Not a good start and another guy I was briefly when I went out for a 2nd look and chatting to afterwards said his son worked for a Ferarri dealership in Cardiff, and reckoned it would cost 25K to sort the problem.

Owner was a really lovely person, got the impression he wasnt local though as seemed suprised when the RAC guy told him the £250K new price would buy a decent house in these parts. I added yes probably get a reasonable 4 bed detached round her for that money. He didnt say how much he had payed for the car, which I understand had been parked up for a fair while. I wonder why!!!!! Wink  Grin
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Per
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Re: XJ12C manual conversion
Reply #16 - 08.11.2011 at 22:07:10
 
AFAIK the 599 has a transaxle meaning 'box and diff is one unit.
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almcl
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Re: XJ12C manual conversion
Reply #17 - 09.11.2011 at 18:57:12
 
I think the RAC man and Per are right:
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Jacqueline
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Re: XJ12C manual conversion
Reply #18 - 09.11.2011 at 19:20:29
 
I see. I am no expert and Ralphs knowledge mainly about keeping trucks on the road.
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Per
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Re: XJ12C manual conversion
Reply #19 - 09.11.2011 at 21:02:29
 
XjRestorations wrote on 08.11.2011 at 07:26:08:
To be honest Per, I don't know. I bought the car in its current state. Loads of history and bills, but nothing specific to the engine build spec. BHP is said to be around 400.
I have only used her on local roads, and the power is immense!
Once the body is sorted out, she will be set up on the rolling road and we will get some accurate figures on the power being delivered.
It is all based on the H.E engine though.

Kind regards,
Keith


I dug a bit deeper and the general feeling is that 400HP is about it for the HE. Nothing about torque though. But your description indicates "enough". And if the basic combustion chamber is kept unchanged the dawdling consumption should still be good. Charging hard there is little to choose between them consumptionwise according to my figures. (Can't find the notes though.)

If the engine turns out to be a complete mess when opened I think a HE is on the cards. Then sequential injection and wasted spark. That plus a manual 5-speed should see me into the  high 20'ies on longer trips. (The best I have ever seen in the XJ-S on one pussyfooting trip is 23mpg but most of the time 20mpg has been relaxed touring mileage in speed restricted Norway.)
Per
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Per
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Re: XJ12C manual conversion
Reply #20 - 14.01.2012 at 23:00:16
 
Not much progress to date. I have sourced a second hand engine (to replace the one that self destructed) which has sat for a longish time. I am currently checking it out .....

One valve stuck partially open. Fortunately I removed all plugs and the inlet manifolds before attempting to rotate by hand, I can see rust on the stem.  Angry  But what can you expect for 300 pounds? V12s are very rare here so I was lucky to source one at all. I'll see if I can gently pursuade the valve to move again. Then I'll check compression before finally deciding whether to strip completely or to use as is.

Then while using it I'll build myself a twin supercharged engine   Cool   I have put my XJ-S up for sale as it is too good to mess about with. Then I'll source a tired XJ-S with a good body to supercharge. I will be looking for about 500Hp and no external tell tales. If I don't get a sensible price for mine (SportsPack, forged 16" BBS split rims and GAZ adjustables) I'll rethink.   Cheesy
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SV8Predator
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Re: XJ12C manual conversion
Reply #21 - 15.01.2012 at 12:22:47
 
Per wrote on 14.01.2012 at 23:00:16:
If I don't get a sensible price for mine (SportsPack, forged 16" BBS split rims and GAZ adjustables) I'll rethink.   Cheesy


Per: rethink this: put a manual box in your Interceptor. That'd be much more interesting.

And get some genuine split rims on the Jag. . .
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Per
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Re: XJ12C manual conversion
Reply #22 - 15.01.2012 at 21:49:18
 
I have toyed with the idea. It does however feel a bit more "uphill" after having rebuilt the original autobox and fitted everything back into the car. (I've just been using forever preparing it for painting, so still not back on the road.  Embarrassed ) . Primarily I want to start with a car that needs work but with a good body. And the chassis of the XJ-S can take everything a 500Hp engine can throw at it with minor mods. BTW the BBS are the real thing, I bought a spare part from the importer. The guy I bought the car from said they cost about 2000 pounds in 1990. Ouch! They are unbelievably light, before I started fitting tyres myself I saw a tyre fitter lifting it after removing the old tyre. He yanked it twice as high as he intended to!  Grin
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SV8Predator
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Re: XJ12C manual conversion
Reply #23 - 16.01.2012 at 19:09:02
 
But what about a manual-gearbox FF? Now that would be something!

By the way I wasn't really implying your wheels were not genuine, it was just,

. . . that you said they were . . .  forged. . .

...
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Per
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Re: XJ12C manual conversion
Reply #24 - 17.01.2012 at 20:46:26
 
SV8Predator wrote on 16.01.2012 at 19:09:02:
But what about a manual-gearbox FF? Now that would be something!

By the way I wasn't really implying your wheels were not genuine, it was just,

. . . that you said they were . . .  forged. . .

pistonheads.co.uk/inc/images/getmecoat.gif


Aaargghhh ... I didn't get that one   Embarrassed

As for a manual FF, will the centre clutch withstand the more brutal changes of a manual? (Was the FFF manual?) With a supercharger? Now that would be something!!!!!!   Cool
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Per
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Re: XJ12C manual conversion
Reply #25 - 04.10.2012 at 22:20:55
 
Time to report on progress or rather lack thereof. Too many other projects ongoing. Interceptor ready for painting, but oh what bodges I found (including one of my own making in the mid 80'ies  Embarrassed  ). Jensen Healey gearbox rebuild incl. use of some used parts and retaining some possibly dodgy parts resulted in some degree of jumping out of second even now. So next on that front is a 5-speed conversion.  BUT, tomorrow I start swapping in the V12 I bought (and checked out). Things take so much time I decided to retain the BW65 for now in order to be able to drive the XJC again. Then I'll decide upon opening up if the old block is salvagable. Either way I will use it as a dummy for preparing the 5-speed conversion for the XJC, after the JH conversion is done.
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Per
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Re: XJ12C manual conversion
Reply #26 - 08.03.2013 at 22:01:29
 
Well, it has been a long time, so long that I will use the BW65  for now in order to be able to drive it at all.  I have seen rather a lot of scathing remarks from people who have tried the kits from the driven man in their XJ-Ss so that is definitely not the way I will go. So given the time and bits I will have on my hand I think I will go the whole hog: Twin superchargers and 5 or 6 speed. Don't hold your breath though. The first steps will be taken next winter, and I suspect it will take a few years of winter evenings.
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SVPredator
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Further up the creek!
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Re: XJ12C manual conversion
Reply #27 - 08.03.2013 at 22:14:45
 
Per, we need photographs, you've got so many interesting things going on!
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