Anyone ever turbocharge a XK8. If so I would assume low boost cause of high compression.
Just making conversation.
Happy Easter.

 

Perhaps a twin-turbo remote setup would work. plenty of space where the rear mufflers are.

 

This might answer your curiosity about what can be done at the very extreme.
Check out: Maybe an LS conversion?
Have fun,
Colin.

 

Thought of that. It would be the easiest way. Wondering about compression and how much boost?

 

They say and LS will not work in an 03 and up because of the computor. I can't even change my rear gears.

 

The problem with a rear mounted "STS" style turbo on an XK8 is getting the compressed air back thru the rear suspension. There is barely enough room to snake two 2.5" exhaust pipes thru, let alone two more compressed air pipes, unless they go under the axle.


Maybe with a large single Turbo and if one side was exhaust and the other compressed air....

 

If it’s just conversation and money no consideration, then still the srs doesn’t seem so attractive to me, it will take some engineering to get it right and even then you still have a massive turbo lag.

Then a ls turbocharged engine (if you can find some room upfront) would be much more interesting (so sell your 4.2 and buy a 4.0 cheap), but to be honest, after being spoiled with the instant boost of a supercharger, better to put a supercharger on the ls engine then.

 

I have a variation on this question. Can the XKRs or the LS engines be twin-charged? A supercharger + a turbocharger or two would make for ungodly power. I imagine that would bring problems as well.

 

But why not go for the proven extra power (to 700HP) using a TS?

I gather it fits, it works.

 

Its on my list of things to do once Im done with my XJR..And Ill be sticking with a 4.2...But don't expect to see me talking about it at least till next year..Im having enough Jag related issues at the moment

 

Reminds me of the years, thousands of thread posts and successes and failures trying to supercharge or turbocharge the Porsche 928.

Going down that road is a marathon but I did see guys accomplish it albeit with huge effort and many, many custom built parts.

I think a lot of people felt that if they could put together a comprehensive kit for others to do the same, they could make some money at it and at least recoup the R&D and custom parts orders. Like the 928, the XK model is a luxury car for a budget price. Same problem the 928 had.

Although these cars sold for mega bucks when new, you can find them for a few grand used and like the 928, the buyers for these cars probably won't invest 6-7 grand to up the power on a car they spent 6-7 grand to buy. Just my opinion but I lived it for years when I had my 928S

 

The difference here is that it isn't a Porsche. These motors aren't mega dollar misunderstood redheaded stepchild but come in various forms in many cars and trucks. Parts availability is easy and the fuel injection system not awful. I personally love the 928 (I like different) but after looking into it. Modification for minimal gain and cost of admission to rebuild a motor kept me away. Bottom line I would not be satisfied with the stock performance and modifying the car was just $$$$ any way you looked at it. Now for me I just love the xkr lines and the performance is decent from the factory. For a Turbo build I picked up a 2003 xkr motor with low miles and an Aston Martin 4.3 v8 cast aluminum intake. The factory Eaton takes close to 100 hp to run and we know we can hit the magic 500 hp mark with a twin screw upgrade. There is no reason why a turbo stock lower end 4.2 Jag engine cant take 600 hp worth of boost safely. Fabricating the pipes isn't that difficult, the car has a nifty place for an air to air IC. Turbo location is debatable but you can likely fit small twins where the factory catalytic are. 600 hp very doable. I haven't put much thought into it for now as I'm getting my xkr back up and running for this summer and my xjr project is more important and MUCH easier...But Even if I spend a total of $10,000 into this between fuel piping and turbos. Total cost including todays price of xkr's...Performance car deal of the century. I like my xkr that much..More HP will make it better. Turbo is the way to go...Allthough the Avos twin screw for my xjr..>Well that will be awfully nice too..As far as an LS motor.....No, Never. Totally takes the fun out of it

 

Post back in a year or two if you ever get a working turbo with that power.

 

It actually got done - a lot!
The 32V, V8 in the 928 is not very difficult to understand and its fuel injection is quite good. The issues are fitment and testing.
Many a 32V went to the scrapper while folks tried many things to extract more power from it. Believe me, I am not trying to put you off from it and with enough budget, anything is possible. Was just stating that I have been down this road before and it gets quite expensive to accomplish.

Do a search for Rennlist, Supercharged, Turbocharged and you will see tons of posts on the topic. Since the motors are both V8, space is confined and the target power is about the same, you might learn a LOT about getting to where you want to get via the work these lads have done exhaustively on the 928

 

[QUOTE=razorboy;1432294]It actually got done - a lot!
The 32V, V8 in the 928 is not very difficult to understand and its fuel injection is quite good. The issues are fitment and testing.
Many a 32V went to the scrapper while folks tried many things to extract more power from it. Believe me, I am not trying to put you off from it and with enough budget, anything is possible. Was just stating that I have been down this road before and it gets quite expensive to accomplish.





I actually did do a bit of research and may have even ran across your car.!..It was the cost of Porsche parts in general that turned me away . As far as turbos I have a bit of experience. My Ford (yes ford) 3.8 v6 (yes v6) makes over 800 to the rear wheels on e85..Thats with a stock block/crank/heads(although modified of course). The issue I see with the xkr is I will have no way to tune it. But if I do all the hard part work Im sure I can get one of the tuning companies to do it. But like I said its in the future. For my xkr I just bought one of the AVOS twin screw kits because well...It will make plenty of 4 door hp with that. The xkr I bought as a project.