Fantasy V12 Transplant
#22
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Ok, time to check the timing I guess. The vacuum advance module is new (as within the last year) and I have the 15" wheels. Rebuilt the dizzy last year so the advance is working.
I don't want to spin 'em on a routine basis...I would just like to know that I can :-)
Thanks,
John
1987 XJ-S V12
62,000 miles
I don't want to spin 'em on a routine basis...I would just like to know that I can :-)
Thanks,
John
1987 XJ-S V12
62,000 miles
#23
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Actually Powerdyne or Vortech could fit a centrifugal supercharger for our cars that would make it a different animal.
Mercedes Benz SL Class SL600 | eBay
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Jaguar Sold XJS 1977 V12 Twin Turbo Race Car Cams Log Book | eBay
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Lambo V12 with 6 speed to start, probably more than $25 from a wrecker.
Mercedes Benz SL Class SL600 | eBay
![](https://www.jaguarforums.com/forum/attachments/xjs-x27-32/61299-fantasy-v12-transplant-4-19082.jpg?dateline=1383578101)
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Jaguar Sold XJS 1977 V12 Twin Turbo Race Car Cams Log Book | eBay
![](https://www.jaguarforums.com/forum/attachments/xjs-x27-32/61292-fantasy-v12-transplant-479279728_tp.jpg?dateline=1383576733)
Lambo V12 with 6 speed to start, probably more than $25 from a wrecker.
Last edited by Scoupe89; 11-04-2013 at 09:15 AM.
#24
#26
#27
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my XJS dont have a live axle, it has the stock factory rear and sub frame, with connector bars, old school stuff!
just changed the ratio, and i have 18" wheels, with 275-35-18 Nitto tires.
so torque multiplication is what spins the tires, its all about torque and always will be, for a street vehicle.
just changed the ratio, and i have 18" wheels, with 275-35-18 Nitto tires.
so torque multiplication is what spins the tires, its all about torque and always will be, for a street vehicle.
#28
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#29
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If money was no object, then I'd go and search worldwide for a wrecked XKR-S or XKR 175. Then I would learn/research for the best people to get this R&D nightmare executed, probably in some english speaking foreign country. 540 HP would be more than enough for the XJS to handle, but I'd doubt that it would stay together above 160 mph, let alone the 174 mph rated XK 175 engine. Good thing is that it would still be a 100% Jaguar car.
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#31
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Mine won't spin a tyre either, wet or dry!
"In a straight line" but only running on 7 cylinders doesn't help either, neither does the the 3 speed auto, or loose worn out suspension.
For the money, throw away the auto, manual 5 speed is the only replacement, fix the timing and electrical problems (Biggest problem with mine with added fuel leaks), and finally you go ITB's a bit of motor work should give you close to the magic 100hp/ltr, then watch out!
Stay tuned to this channel, I have a second motor and a 5 speed that will built like this for XJS.
If anyone has extractor plans out there that they would like to share please PM me
![Icon Frown](https://www.jaguarforums.com/forum/images/smilies/icon_frown.gif)
For the money, throw away the auto, manual 5 speed is the only replacement, fix the timing and electrical problems (Biggest problem with mine with added fuel leaks), and finally you go ITB's a bit of motor work should give you close to the magic 100hp/ltr, then watch out!
Stay tuned to this channel, I have a second motor and a 5 speed that will built like this for XJS.
If anyone has extractor plans out there that they would like to share please PM me
![Icon Beerchug](https://www.jaguarforums.com/forum/images/smilies/icon_beerchug.gif)
#33
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I'm trying to follow what you're saying here (cuz obvsly I have zero experience in this area but the discussion is interesting and informative), does your explanation require a limited-slip diff or does that matter (the part about varying the contact patches)?
#34
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Warr are their diffs open? It occurs to me that there may be other reasons for a live axle on those cars. Not to be argumentative, just thinking out loud. They don't really need much suspension and the short live axles are compact. Here's another thing I've always assumed...that a big tough live axle/diff is easy to get your hand on whereas most production IRS setups can't handle the torque. (I'm guessing).
Last edited by Mkii250; 11-03-2013 at 12:34 PM.
#35
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my XJS dont have a live axle, it has the stock factory rear and sub frame, with connector bars, old school stuff!
just changed the ratio, and i have 18" wheels, with 275-35-18 Nitto tires.
so torque multiplication is what spins the tires, its all about torque and always will be, for a street vehicle.
just changed the ratio, and i have 18" wheels, with 275-35-18 Nitto tires.
so torque multiplication is what spins the tires, its all about torque and always will be, for a street vehicle.
#36
![Default](/forum/images/icons/icon1.gif)
Ok, time to check the timing I guess. The vacuum advance module is new (as within the last year) and I have the 15" wheels. Rebuilt the dizzy last year so the advance is working.
I don't want to spin 'em on a routine basis...I would just like to know that I can :-)
Thanks,
John
1987 XJ-S V12
62,000 miles
I don't want to spin 'em on a routine basis...I would just like to know that I can :-)
Thanks,
John
1987 XJ-S V12
62,000 miles
My '87 wouldnt spin after sitting for about 10 years. The wires were bad and it had a bad distr. cap.
After just a decent tune up it ran like new!
#38
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Drag Slicks - Tire Tech - Tire Care - Hot Rod Magazine
Mickey Thompson Performance Tires & Wheels
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Mkii250 (11-04-2013)
#39
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[QUOTE=Scoupe89;844876]Actually Powerdyne or Vortech could fit a centrifugal supercharger for our cars that would make it a different animal.
Mercedes Benz SL Class SL600 | eBay
![](https://www.jaguarforums.com/forum/attachments/xjs-x27-32/61299-fantasy-v12-transplant-4-19082.jpg?dateline=1383578101)
![](https://www.jaguarforums.com/forum/attachments/xjs-x27-32/61291-fantasy-v12-transplant-4-19083.jpg?dateline=1383576565)
QUOTE]
You bet it would make it a different animal!
By "our cars" I assume that you refer to the XJS, V12 or I6?
If so, would you know if they may work out a CARB EO approval for CA?
Centrifugal compressor is not really the ideal way to s/c, but it sure is better than nothing, as I find that it'd be easier to adapt a centrifugal compressor (a la turbo) over a traditional, plenum mounted S/C compressor. I can easily kill the lag by selecting the "drive" mode on my N2O injection, which gives me an initial 1/2 second push/kick.
But California doesn't make it easy.
Cheers
Mercedes Benz SL Class SL600 | eBay
![](https://www.jaguarforums.com/forum/attachments/xjs-x27-32/61299-fantasy-v12-transplant-4-19082.jpg?dateline=1383578101)
![](https://www.jaguarforums.com/forum/attachments/xjs-x27-32/61291-fantasy-v12-transplant-4-19083.jpg?dateline=1383576565)
QUOTE]
You bet it would make it a different animal!
By "our cars" I assume that you refer to the XJS, V12 or I6?
If so, would you know if they may work out a CARB EO approval for CA?
Centrifugal compressor is not really the ideal way to s/c, but it sure is better than nothing, as I find that it'd be easier to adapt a centrifugal compressor (a la turbo) over a traditional, plenum mounted S/C compressor. I can easily kill the lag by selecting the "drive" mode on my N2O injection, which gives me an initial 1/2 second push/kick.
But California doesn't make it easy.
Cheers
#40
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All drag Cars and even most pro street cars use a spool or welded axles on the street. Most drag wheels are bolted to the slicks to prevent slip also.
Drag Slicks - Tire Tech - Tire Care - Hot Rod Magazine
Mickey Thompson Performance Tires & Wheels
Drag Slicks - Tire Tech - Tire Care - Hot Rod Magazine
Mickey Thompson Performance Tires & Wheels
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