Xj40/X300 XJR
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Junior Member
Joined: Mar 2014
Posts: 19
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From: Poland
Xj40/X300 XJR
Hello, I've been reading the forum for a while but just registered recently. A few details about my project:
I have what originally started as a 91 XJ40 Sovereign. After a few years of ownership, it has the Supercharged AJ16 from the X300 XJR, along with the entire wiring harnesses, HVAC system, and interior from the X300. I even swapped the X300 heated windshield.
The front and rear subframes with all their suspension components are also XJR items, with polybushes everywhere and the XJR front and rear anti-roll bars. The differential is a short-geared N/A version, and I have the Getrag 290 manual box. I also have the rare factory body kit from the Series II XJ40 XJR.
Save for the body work and painting, I've done all the work myself. The grooves into which the XJ40 door seals fit were removed, allowing the use of X300 doors with their superior seals. This also required the modification of the front fenders/wings as the edge near the door is a slightly different shape on X300s vs the 40. Of course, I retained the factory metal Xj40 door handles, so the untrained eye wouldn't see a difference.
The engine was disassembled and put together with new timing chains, tensioners, and gaskets. I have yet to fire it up for the first time, as I haven't finished connecting the fuel and cooling systems yet. Can't wait though... :-) Here are a few images from before it was painted:
It occurred to me recently that the only body panel that was on the car when I purchased it was the front left fender/wing. Every other element was replaced at one point or another due to rust or other damage.
I have what originally started as a 91 XJ40 Sovereign. After a few years of ownership, it has the Supercharged AJ16 from the X300 XJR, along with the entire wiring harnesses, HVAC system, and interior from the X300. I even swapped the X300 heated windshield.
The front and rear subframes with all their suspension components are also XJR items, with polybushes everywhere and the XJR front and rear anti-roll bars. The differential is a short-geared N/A version, and I have the Getrag 290 manual box. I also have the rare factory body kit from the Series II XJ40 XJR.
Save for the body work and painting, I've done all the work myself. The grooves into which the XJ40 door seals fit were removed, allowing the use of X300 doors with their superior seals. This also required the modification of the front fenders/wings as the edge near the door is a slightly different shape on X300s vs the 40. Of course, I retained the factory metal Xj40 door handles, so the untrained eye wouldn't see a difference.
The engine was disassembled and put together with new timing chains, tensioners, and gaskets. I have yet to fire it up for the first time, as I haven't finished connecting the fuel and cooling systems yet. Can't wait though... :-) Here are a few images from before it was painted:
It occurred to me recently that the only body panel that was on the car when I purchased it was the front left fender/wing. Every other element was replaced at one point or another due to rust or other damage.
Joined: Oct 2007
Posts: 121,084
Likes: 6,652
From: PHX some of the time
Welcome to Jaguar Forums GabrielG,
Good to have you with us.
Serious work indeed, keep us posted on the progress.
You have found the way to the tech sections so no need for a link, did you see the regional sections? Your one is here Europe - Jaguar Forums - Jaguar Enthusiasts Forum
Enjoy the forum.
If you haven't done so already you should add your car details to your signature to help others to help you.
If you need help with getting around and using the forum follow this link for some help Forum Help
Good to have you with us.
Serious work indeed, keep us posted on the progress.
You have found the way to the tech sections so no need for a link, did you see the regional sections? Your one is here Europe - Jaguar Forums - Jaguar Enthusiasts Forum
Enjoy the forum.
If you haven't done so already you should add your car details to your signature to help others to help you.
If you need help with getting around and using the forum follow this link for some help Forum Help
Joined: Dec 2011
Posts: 120,439
Likes: 17,010
From: Durham, UK
Welcome to the forum GabrielG,
Good to have you with us at Jaguar forums.
If you'd asked on the forum about this project before you started, most members would have either said "don't do it" or "impossible"!
Looking forward to following your progress.
Enjoy the forums.
Graham
Good to have you with us at Jaguar forums.
If you'd asked on the forum about this project before you started, most members would have either said "don't do it" or "impossible"!
Looking forward to following your progress.
Enjoy the forums.
Graham
Veteran Member
Joined: Oct 2013
Posts: 2,042
Likes: 445
From: Grasonville, MD
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In the meantime, any useful site information you may need such as how to post pictures, edit signatures, add videos, using the
search facility etc, can be found here within the following link Helpful_information
There are lots of members local to you with the same interests with info on local dealers and possible meets.
Regional - Jaguar Forums - Jaguar Enthusiasts Forum
Need a Manual, a TSB, or General Info' about your Jag? Check out our >> DOWNLOAD AREA <<
I've manually upgraded you to Full forum access so you can better view the site and all its features, so please Jump on in and enjoy the site........
Thread Starter
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Junior Member
Joined: Mar 2014
Posts: 19
Likes: 3
From: Poland
Unfortunately I haven't had much time over the months to work on the car, but here is the progress I've made since the last post.
The suspension is sitting on coilovers that I made myself using some Koni shocks for an XJ40, the wheels are on and I've sorted out the wiring for the most part. The car runs on a 4.0 XJR auto ECU, but as the ignition will be retarded without the TCU I'm contemplating using a 3.2 manual ECU which I have and correcting the fuel and ignition maps with a piggyback type controller.
I had problems starting the car at first because the fuel pressure regulator was stuck after laying in my basement for a year, and I couldn't figure out the cause.
The suspension is sitting on coilovers that I made myself using some Koni shocks for an XJ40, the wheels are on and I've sorted out the wiring for the most part. The car runs on a 4.0 XJR auto ECU, but as the ignition will be retarded without the TCU I'm contemplating using a 3.2 manual ECU which I have and correcting the fuel and ignition maps with a piggyback type controller.
I had problems starting the car at first because the fuel pressure regulator was stuck after laying in my basement for a year, and I couldn't figure out the cause.
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