XJS V12 Manual Conversion & ITB's & Maybe TWR Rep

XJS V12 Manual Conversion & ITB's & Maybe TWR Rep

Author
Discussion

V12 Migaloo

518 posts

102 months

Monday 8th June
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OTT, that's sounds great, keep me posted how the conversion goes

craigjm

10,796 posts

156 months

Monday 8th June
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Tom Lenthall is a top guy in playing with old Jags

Edited by craigjm on Thursday 16th July 09:35

alabbasi

1,121 posts

43 months

Monday 8th June
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On the subject of American bumpers


Jim the Sunderer

2,398 posts

138 months

Sunday 14th June
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alabbasi said:
On the subject of American bumpers

Bloody hell! The Land Rovers parked outside the Tyne Tunnel have bumpers like that for pushing broken down motors.

2oldjags

1 posts

2 months

Saturday 20th June
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OTT532 said:
I am just about to convert my V12 XJS from 3 speed auto to 5 speed Getrag 265. I was very fortunate to find a NOS box with a special DJB bellhousing and a new Rob Beere flywheel. This enables the conversion without using any conversion kit. I was ready to buy a conversion kit using an old recycled gearbox with who knows what mileage on it until I stumbled over this new one. I am using Tom Lenthall in Wokingham to do the work. It should be finished in a couple of weeks I will post a review once finished.
Fantastic - I'm doing something very similar with my 91 XJS V12. Currently fitting a rebuilt motor after the old one came to a sad end (sticky valve interfered with piston), so going the whole hog with a Getrag 265 and the Simply Performance conversion kit. Will be interesting to compare notes.

Re the Getrag 265, I had the same box in my 88 XJ40 3.6 and as someone said that combination shifts very nicely - the 3.6 is a sweet motor. The gearshift I remember was smooth and precise, but that was when the car was only 9 years old. With age I expect any rubber bushings around the stick might get worn, I guess I'll find out soon enough.

alabbasi

1,121 posts

43 months

Saturday 20th June
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2oldjags said:
Currently fitting a rebuilt motor after the old one came to a sad end (sticky valve interfered with piston), .
You must live in America because apparently that never happens in England

lukeharding

1,420 posts

45 months

Monday 22nd June
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alabbasi said:
2oldjags said:
Currently fitting a rebuilt motor after the old one came to a sad end (sticky valve interfered with piston), .
You must live in America because apparently that never happens in England
Or at least, it certainly doesn't happen to nearly every car like you make out. Also, he didn't mention it overheating, did he?

alabbasi

1,121 posts

43 months

Monday 22nd June
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lukeharding said:
Or at least, it certainly doesn't happen to nearly every car like you make out. Also, he didn't mention it overheating, did he?
biggrin

a8hex

5,162 posts

179 months

Wednesday 15th July
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An ad has just turned up in my email from Guy Broad about their 5 speed conversion. They do a version for the V12 E Type so maybe this is an option for the XJS too. It uses Ford MT75 internals in a custom casing designed to bolt straight onto the Jaguar bell housing without needing an adapter plate. This was the gearbox I ended up with in the XK150 and it certainly has a nice slick action.

V12 Migaloo

518 posts

102 months

Thursday 16th July
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oh I wonder how much.... WSM do much the same.... Now I have taken the lump out of mine I need to get serious about fitting a manual box..


Edited by V12 Migaloo on Thursday 16th July 09:35

a8hex

5,162 posts

179 months

Thursday 16th July
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V12 Migaloo said:
oh I wonder how much.... WSM do much the same.... Now I have taken the lump out of mine I need to get serious about fitting a manual box..
It was Winspeed that supplied and fitted my gearbox. I'm not sure whether they still go through Guy Broad but it is that gear box. Chris is well versed in fitting it and making the other necessary changes to the car to cope with the differences. The gear box is design to bolt straight in but it is much lighter than the original Moss box for the XK (but then so are some battleships) so the suspension needs resetting. I suspect that they'll have a car with the gear box fitted that you can try. I'd imagine that it would be a good fit in the XJS, for the XK it felt too modern and easy to live with, fundamentally changing the nature of the car. This might be a good thing or a bad thing depending on taste, but a XJS is a very different animal to an XK150.

lukeharding

1,420 posts

45 months

Thursday 16th July
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a8hex said:
An ad has just turned up in my email from Guy Broad about their 5 speed conversion. They do a version for the V12 E Type so maybe this is an option for the XJS too. It uses Ford MT75 internals in a custom casing designed to bolt straight onto the Jaguar bell housing without needing an adapter plate. This was the gearbox I ended up with in the XK150 and it certainly has a nice slick action.
Just had a look at their website for this, but can only find a 5 speed conversion for the XK, which is rated up to 300hp. I'd be curious to know more about the V12 one too if you've got more info on it?

a8hex

5,162 posts

179 months

Thursday 16th July
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lukeharding said:
a8hex said:
An ad has just turned up in my email from Guy Broad about their 5 speed conversion. They do a version for the V12 E Type so maybe this is an option for the XJS too. It uses Ford MT75 internals in a custom casing designed to bolt straight onto the Jaguar bell housing without needing an adapter plate. This was the gearbox I ended up with in the XK150 and it certainly has a nice slick action.
Just had a look at their website for this, but can only find a 5 speed conversion for the XK, which is rated up to 300hp. I'd be curious to know more about the V12 one too if you've got more info on it?
The email says
GuyBroadAd said:
Based on the world-renowned Ford MT75 Cosworth internals, utilising the patented synchro system on all gears. Capable of taking 350 BHP or 300+ ft lbs torque easily.
The entry on the website looks older, its just talking about the XK and their testing in a XK140 and I didn't see the reference to the E Type.
Although it's hard to say what my engine (a 4.2) was producing, it was dyno'd by CKL when they fitted it at close to 300 when it really wasn't running that well and it felt much faster after more development it handled that without problems. The Ford community seems to report a wide range of experiences with more power (although it is torque that's the key for gearboxes) but as always it depends on how you use it.
If V12 Migaloo is talking to Winspeed then they know the box well and Chris has converted XJS to manuals in the past, although I don't know which box he used.

lukeharding

1,420 posts

45 months

Thursday 16th July
quotequote all
a8hex said:
lukeharding said:
a8hex said:
An ad has just turned up in my email from Guy Broad about their 5 speed conversion. They do a version for the V12 E Type so maybe this is an option for the XJS too. It uses Ford MT75 internals in a custom casing designed to bolt straight onto the Jaguar bell housing without needing an adapter plate. This was the gearbox I ended up with in the XK150 and it certainly has a nice slick action.
Just had a look at their website for this, but can only find a 5 speed conversion for the XK, which is rated up to 300hp. I'd be curious to know more about the V12 one too if you've got more info on it?
The email says
GuyBroadAd said:
Based on the world-renowned Ford MT75 Cosworth internals, utilising the patented synchro system on all gears. Capable of taking 350 BHP or 300+ ft lbs torque easily.
The entry on the website looks older, its just talking about the XK and their testing in a XK140 and I didn't see the reference to the E Type.
Although it's hard to say what my engine (a 4.2) was producing, it was dyno'd by CKL when they fitted it at close to 300 when it really wasn't running that well and it felt much faster after more development it handled that without problems. The Ford community seems to report a wide range of experiences with more power (although it is torque that's the key for gearboxes) but as always it depends on how you use it.
If V12 Migaloo is talking to Winspeed then they know the box well and Chris has converted XJS to manuals in the past, although I don't know which box he used.
Interesting, thanks! I doubt I'll need it in the immediate future but possibly got an XJ or two I may convert so that may be another option.

OTT532

5 posts

3 months

Thursday 16th July
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Well it took a little longer than I wanted to get all the bits together. Tom Lenthal now has the car and the auto box is out. Of course we have found a small number of additional jobs that are easier done while the car is in bits. Hopefully the 5 speed will be in early next week. I took the opportunity to replace all the wood trim with a dark Wenge veneer, by Classical Dash in Stokenchurch. I wanted something totally different and I am very pleased with the result.
The next job is a hand built Stainless steel exhaust from Haywood and Scott in Essex. That's booked in for August 17th. Then when the weather runs out and Autumn starts I will be doing the body work. Although this car has £37K receipts from KWE only 15k miles ago it has been 10 years and one particular wheel arch was filled instead of replaced with new metal. So that and a number of nicks and small blemishes mean a full restoration is going to be done.
Then I will have a V12 totally rust free, pre face lift 5 speed XJS with a sports exhaust. That is exactly what I set out to achieve.

RobXjcoupe

2,124 posts

47 months

Friday 17th July
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OTT532 said:
Well it took a little longer than I wanted to get all the bits together. Tom Lenthal now has the car and the auto box is out. Of course we have found a small number of additional jobs that are easier done while the car is in bits. Hopefully the 5 speed will be in early next week. I took the opportunity to replace all the wood trim with a dark Wenge veneer, by Classical Dash in Stokenchurch. I wanted something totally different and I am very pleased with the result.
The next job is a hand built Stainless steel exhaust from Haywood and Scott in Essex. That's booked in for August 17th. Then when the weather runs out and Autumn starts I will be doing the body work. Although this car has £37K receipts from KWE only 15k miles ago it has been 10 years and one particular wheel arch was filled instead of replaced with new metal. So that and a number of nicks and small blemishes mean a full restoration is going to be done.
Then I will have a V12 totally rust free, pre face lift 5 speed XJS with a sports exhaust. That is exactly what I set out to achieve.
Awesome sauce smile

urquattroGus

Original Poster:

1,274 posts

146 months

Friday 17th July
quotequote all
OTT532 said:
Well it took a little longer than I wanted to get all the bits together. Tom Lenthal now has the car and the auto box is out. Of course we have found a small number of additional jobs that are easier done while the car is in bits. Hopefully the 5 speed will be in early next week. I took the opportunity to replace all the wood trim with a dark Wenge veneer, by Classical Dash in Stokenchurch. I wanted something totally different and I am very pleased with the result.
The next job is a hand built Stainless steel exhaust from Haywood and Scott in Essex. That's booked in for August 17th. Then when the weather runs out and Autumn starts I will be doing the body work. Although this car has £37K receipts from KWE only 15k miles ago it has been 10 years and one particular wheel arch was filled instead of replaced with new metal. So that and a number of nicks and small blemishes mean a full restoration is going to be done.
Then I will have a V12 totally rust free, pre face lift 5 speed XJS with a sports exhaust. That is exactly what I set out to achieve.
Awesome! KWE do look like they can charge huge amounts!

lukeharding

1,420 posts

45 months

Friday 17th July
quotequote all
OTT532 said:
Well it took a little longer than I wanted to get all the bits together. Tom Lenthal now has the car and the auto box is out. Of course we have found a small number of additional jobs that are easier done while the car is in bits. Hopefully the 5 speed will be in early next week. I took the opportunity to replace all the wood trim with a dark Wenge veneer, by Classical Dash in Stokenchurch. I wanted something totally different and I am very pleased with the result.
The next job is a hand built Stainless steel exhaust from Haywood and Scott in Essex. That's booked in for August 17th. Then when the weather runs out and Autumn starts I will be doing the body work. Although this car has £37K receipts from KWE only 15k miles ago it has been 10 years and one particular wheel arch was filled instead of replaced with new metal. So that and a number of nicks and small blemishes mean a full restoration is going to be done.
Then I will have a V12 totally rust free, pre face lift 5 speed XJS with a sports exhaust. That is exactly what I set out to achieve.
Excellent! Sounds very good. Is it a full exhaust inc. manifolds that you're having built?

OTT532

5 posts

3 months

Sunday 19th July
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I am leaving the stock manifolds. i have discussed custom ones with H&S and they can add them if I want to go that route later.

lukeharding

1,420 posts

45 months

Monday 20th July
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Nice, sounds like a good plan thumbup