So guys I have a few questions about the XKR motor.

How many pounds of boost does the stock supercharger put out?

Have any of you ever tried smaller pulleys to increase boost?

How much boost will the stock internals take?

Any information will be very helpful thanks.

 

The stock internals will take quite a bit. Avos has pioneered a twin screw kit and has seen 650+ hp on the stock internals. There are several members with smaller pulleys who will weigh in on those options too. The stock Eaton does get hot, so that is a consideration. I take it you plan on shoving one of these into your Lincoln LS? That would be pretty cool. Be sure to keep us updated if you do that. I think the S-type R motor would be a bit easier, since that car is closer to the LS.

 

As Keith says there are dozens of posts on XKR souping.
You're best off using Google 'Jaguar Forums XKR pulley' or similar to find them.

 

great stuff, I jumped the gun making the thread. But I will use it as a collection area in which I post all my findings to organize them.

I am doing the XKR motor because of the gains for the price, honestly putting the s-type in would be a waste. The LS and XKR do use the exact same block so it should work out fine... HAHA

XKR MOTOR THREADS


Intake
https://www.jaguarforums.com/forum/x...old-air-65078/

Lots of stuff from 2002 XKR (pulley mod)
https://www.jaguarforums.com/forum/x...te-pics-60584/

Pulley Mod Writeup
https://www.jaguarforums.com/forum/x...entures-46329/

 

No, no criticism intended at all.
It is harder to find stuff using the internal search engine rather than Google which uses better logic.

 

Keith,

Thank you, I will have to look for some different cooling methods members have used to keep the eaton chilled out

 

we use the same or similar platform on my Lincoln Forum and the search feature is a chore to use. I ended up making a sticky with about 100 thread links in it to threads covering the popular topics.

 

When you really want to go crazy: https://www.jaguarforums.com/forum/p...59/#post243827

 

I love it,

I will not be doing this at first, maybe one I get everything sorted out first with the initial swap.

So my next questions, I did a bit of searching.

What gears does the XKR have so I know what I should shoot for in my LS I am thinking like 3.77's or 3.73's some where in there.

Also does the XKR use a one piece drive shaft? The LS has a 2 piece shaft and I am not sure I trust it under this load.

Thanks guys

 

So I see the XKR from a search has the 2 piece drive shaft as my Lincoln does. While I did find some threads on the gears, I didn't see what the XKR came with stock...

 

Here are some transmission specs for the 4.2 version and rear axle for 4.0 and 4.2

Edit: add 4.0 Mercedes 5G Tronic spec. I believe the W5A580 version is fitted to the XKR.

 

Stumpy,

The first picture in your post shows the engine as a aj34, My LS has an AJ-V8 I am not sure of whether or not is an AJ-XX or what though, do you know what the difference in the numbering is

 

Jaguar AJ-V8

4.0L NA
AJ26
1997-1998 Jaguar XJ8
1997-1998 Jaguar XK8

AJ27
1999-2004 Jaguar XJ8
1999-2004 Jaguar XK8

AJ28
2000-2002 Jaguar S-Type 281 hp (210 kW), 287 lb·ft (389 N·m)

4.0L S/C
AJ26S
1998-1999 Jaguar XJR
1998-1999 Jaguar XKR

AJ27S
2000-2003 Jaguar XJR
2000-2003 Jaguar XKR
2000-2002 Vanden Plas
2002 Daimler Super V8

3.9L NA
AJ30
2000-2002 Lincoln LS, 252 hp (188 kW) 267 lb·ft (362 N·m)
2002 Ford Thunderbird, 252 hp (188 kW) 267 lb·ft (362 N·m)

AJ35
2003-2006 Lincoln LS, 280 hp (209 kW) 286 lb·ft (388 N·m)
2003-2005 Ford Thunderbird, 280 hp (209 kW) 286 lb·ft (388 N·m)

4.2L NA
AJ34
2002–2006 Jaguar XK-series 294 hp (219 kW), 303 lb·ft (411 N·m)
2006–2008 Jaguar XK-series 300 hp (224 kW), 310 lb·ft (420 N·m)
2002–2008 Jaguar S-Type 4.2, 300 hp (224 kW) and 310 lb·ft (420 N·m)
2003–present Jaguar XJ8, 300 hp (224 kW) and 310 lb·ft (420 N·m)
2009–present Jaguar XF, 300 hp (224 kW) and 310 lb·ft (420 N·m)

4.2L SC
AJ34S
2003-2009 Jaguar XJR/Super V8, 400 hp (298 kW) and 408 lb·ft (553 N·m)
2002-2006 Jaguar XKR, 400 hp (298 kW) and 408 lb·ft (553 N·m)
2006-2008 Jaguar XKR, 420 hp (313 kW) and 410 lb·ft (560 N·m)
2002-2008 Jaguar S-Type R, 400 hp (298 kW) and 408 lb·ft (553 N·m)
2005–present Daimler Super Eight
2009-2010 Jaguar XF, 420 hp (313 kW) and 408 lb·ft (553 N·m)

5.0L
AJ133
2009–present Jaguar XFR, 510 PS (380 kW; 500 hp) and 625 N·m (461 lbf·ft)
2009–present Jaguar XJR, 510 PS (380 kW; 500 hp) and 625 N·m (461 lbf·ft)
2011–present Jaguar XKR-S, 550 PS (400 kW; 540 hp) and 680 N·m (500 lbf·ft)
2009–present Jaguar XKR, 510 PS (380 kW; 500 hp) and 625 N·m (461 lbf·ft)
2009–present Jaguar XF, 385 PS (283 kW; 380 hp) and 515 N·m (380 lbf·ft)
2009–present Jaguar XJ, 385 PS (283 kW; 380 hp) and 515 N·m (380 lbf·ft)
2009–present Jaguar XK, 385 PS (283 kW; 380 hp) and 515 N·m (380 lbf·ft)
2009–present Land Rover Range Rover, 375 hp (280 kW) and 375 lb·ft (508 N·m)
2009–present Land Rover Range Rover, 510 hp (380 kW) and 461 lb·ft (625 N·m)
2009–present Land Rover Discovery, 375 hp (280 kW) and 375 lb·ft (508 N·m)
2009–present Land Rover Range Rover Sport, 510 hp (380 kW) and 461 lb·ft (625 N·m)
2009–present Land Rover Range Rover Sport, 375 hp (280 kW) and 375 lb·ft (508 N·m)

Other Variants
Land Rover 4.2L
2006 Land Rover Range Rover Sport 385 hp (287 kW) and 406 lb·ft (550 N·m)
2006 Land Rover Range Rover 400 hp (298 kW) and 413 lb·ft (560 N·m)

Land Rover 4.4L
2005 Land Rover Discovery - 300 hp (224 kW), 315 lb·ft (427 N·m)
2006 Land Rover Range Rover Sport - 300 hp (224 kW) @ 5500 rpm, 315 lb·ft (427 N·m) @ 4000 rpm
2006 Land Rover Range Rover - 305 hp (227 kW) @ 5750 rpm, 325 lb·ft (441 N·m) @ 4000 rpm

Aston Martin 4.3L/4.7L
2005–present Aston Martin V8 Vantage

 

Keith,

Fantastic, thank you. I emailed Jaguar about sponsoring this as it will be a track car when done. Hopefully I will hear back from them.

 

Hi
do you know where i can check if i have a AJ26S or an AJ27S?
Thanks
Maxi

 

What year is your car?

 

It's a 2000 Keith.

 

It would be an AJ27S then.

 

Yes it's a year 2000.
Thank you!

 

so, I have been working on preparing for this more, and I may actually get a couple sponsors for the project. As well I should be getting a new job, tripling my income which will progress this very much