I read on an old thread on this forum of a possible kenne bell supercharger for the XJR. I was wondering where I could find it, or if anyone knew a whole ton about this upgrade. I was reading it could take up to a whole second off the 0-60 time (like holy cow that definitely got my attention). Any help, or anyone who knows where I could get one would be greatly appreciated! Thank you!

 

Powered and sounded by KB

 

Don't let XJR fool you, he's done a bit more to that gal than just a KB... ...but he's got a torquen' fast girl there.

Look for threads of him and AVOS and you'll probably find about the fastest, best setup, cars.

 

Loads of blue smoke , clearly not good for the engine

 

I think that was tyre burn-out.

 

lol

 

The XJR is the deadest of dead platforms after avos quit selling twin screw kits.

If a lot of owners magically stop being cheapskates, somebody will probably offer stuff for this platform.

 

Twin-screw is just heart of the serious mods. It's wrong idea just to think that you install TS and that's it. There are a lot of weak or even dangerous points you have to be ready to modding them to handle new level of power. 4.0 is not so good basis - espcially AJ26 - because of poor knock control ( and all that very limited tuning possibility of closed Denso system ), cast pistons, weak composite head gaskets, weak open differential et, cooling, fuelling, intake etc If your target is max 550bhp you can do it, but still reserve money also for other than just the new supercharger.

 

I think it's just a different kind of owner to its rivals,
I would guess most people are just content with the 370hp and don't need to mod it into a completely different feeling car.

 

The essence to hot rod something old or new seems to be a geno in many folks. Whether you clipped that playing card to your bicycle forks and let the spokes rap out the rhythm of the speed or your shoe horning a blown Coyote Motor into a Mustang. The desire to have more than you had is in almost all of us. What sucks is as XJR states, the Jag platform will cost you to get there and then again your limited.

To see today's cars and engines and for that fact tunes, is in no way comparable to this generation vehicle. Today's hot rod comes from the factory with 500+ hp and a tune will get you up toward 600. But adding a larger blower and MAF/TB and now your pushing over 600, all without pulling the heads. Its a very OEM provided toy for us to modify now a days...its on display everyday on Motor Trend Network.

 

Yes OP, as stated a few posts above, avos no longer makes them. You can get a decent power increase by getting a larger crank pulley, smaller upper pulley, high flow cats, bigger intake tube, ported TB and upgrading the cooling system. Oh, and LSD would be awesome to.

After daily driving a full bolt on 2006 e55 amg for about two months,(before buying my 02 xjr) there is a significant power difference. But, the R is still not slow by any means. Much better looking and more character to.

 

In my opinion one of the key weak links is the head gasket issues. Getting new MLS head gaskets isn’t enough when going with the oversized crank pulley and smallest blower pulley to gain maximum boost. If I’m not mistaken, when Jaguar went to the upgraded tensioners in 8/01’, I believe they also went to the MLS HG’s then?? I do know that the XJR 100 that I modified for a customer about 6 years ago had 30K miles on it and it had factory MLS HG’s and under full boost the heads would lift causing a smoke screen behind him. The weak link being the cylinder head fasteners. Once I replaced the HG’s and replaced with ARP head studs, problem solved. To the average guy doing their own work on the weekends, this is quite a big job. The moral of the story is, if your not ready to tackle a big job prior to putting the ‘big and little’ pulleys on and having the engine last, just leave the big pulley alone is my advice.

 

Yeah I read that you post that on here before. So would just a +2.5 psi upper pulley be reliable?

One thing I have seen on the net, is people saying it's hard to get more power out of the x308 R's. Well, before buying mine, I did research on the e39 m5 and w210 e55. Hard to get more power out of them also. Dollar for power wise. You pretty much have to boost them.

 

I wouldn’t hesitate to put the smallest pulley on the heaton. To play it safe, I would take the hood off to make sure you have a good eye on everything.

Getting back to the TS thread, I sure wish there was a way to get the rotors from a TS to fit in the stock Eaton M112 housing. That would save SO MUCH fabricating time and money but it’s just wishful thinking.

 

Its cheaper and more effective to get a case that is designed for TS rotors, the amount of material you wold need to add to the m112 and the extra machining would be very costly. Next t that the intake is way to restrictive to make it worth while, better to hope that someone may make something, or a 2nd hand unit comes on the market.

PS I may have one extra option, as I am adjusting now my setup to a 3.2 one, I could sell my 2.6 SC for a friendly price, but it would still require some new parts to get the full setup as I reuse most f them for the 3.2.
PS2 If you don;t mind a screaming unit, the TS autorotor 1.7 (my 1st prototype ) fits exactly in the spot of the M112, so just some small work on adaptors needed to make it work. But it will be very noisy as you would need to turn it pretty fast and you have the limitation of the intake elbow as mentioned.

 

I’d love to get a new sc for this thing. Idk if you had a price in mind for the 1.7, but if you did I’d love to take a look. And if I need to get a new elbow, do you know where I could find a better one? I’d love a 2.6, but I lack both the fund and the motivation to make that work if it doesn’t fit in the factory spot. If the 1.7 fits, and I don’t have to mess with the heat extractors, or the faceplate on top, then I would 100% be interested

 

I wouldn't offer more than $1500 barring the availability of parts. I was checking on a 1.7 from Canada and getting parts was a scavenger hunt. I even went to a well known source PSE and they sold off their stock for 1.7's.
https://www.ebay.com/itm/Whipple-Aut...kAAOSwOHVeO0VZ

For more boost, but again, check for parts availability...
https://www.ebay.com/itm/1991-2003-N...wAAOSw0sVepvE1

 

Now what about the TVS 1.9?

Theyre almost as good as an early whipple. Cobras run out of octane before they run out of blower.

 

Just out of curiosity, what size is the M112?

 

112 cubes, 1.835 Liters