could anyone please help me, i have a s-type and i want to put a turbo (or two small ones) on and does it need a modified exhaust etc ? and please let me know what makes (or websites to buy) thank you so much for any constructive help, jordi

uhh... way too much custom work, buy a different car.

what spec s-type for starters?

+1, just sell and get something else

+2 - Forget it!

Take JagV8's advice...

Putting turbo(s) on a 14 year old engine that's got an 11:1 compression ratio is a quick way to shorten it's remaining life.

There are no off-the-shelf kits, you'd have to make everything yourself.

You don't say which engine you've currently got: 2.5; 3.0 etc

but the cost in time, tears and money to turbo-charge a normally aspirated engine will far outweigh the cost of buying yourself a 4.2 S-type.

Sounds like the OP has a 4.0 V8 (2000 MY)

hi there, thanks for the advice, i was planning on getting a custom exhaust for it etc, and if it will have such a bad affect on it then i may reconsider? and is there anything else i could have/use? and its a 1999 3.0ltr, thanks

Buy an S-Type R, you'll spend a fortune even coming close to a proper turbo setup on a 99 3.0...

As stated by other members, the cost of this would be massively prohibitive and the work involved would require so much specialist welding & machining that you'd be far better off buying an R.

A custom ECU would be needed, or at the least a piggy back ecu; and I don't know of any for Jaguar engines. For Japanese engines they are two a penny (Greddy etc) but for this marque you'd be on a first. Zytec would be a possibility as this was used on the XJ220 and Aston DB7..... Maybe even Megasquirt if you fancy the DIY route?

Looking at the costs involved you'd probably be paying:

£500 for 2 turbos (assuming one per bank)
£500+ for each manifold
£500 for Megasquirt
£1500 for low compression pistons
etc etc

I'd budget £4k+ in all. Thats in the bottom bracket of S-Type R money

tack on another $10k in labour having someone else do the pioneer work in turbo'ing the S-type, by you're even asking this sort of thing on the forums, you're completely unqualified to see something of this scope through,

Ha ha ha whaaa

Turbos, whaaa Haa ha

Someone should read the forum before posting

Jordi, just stop. Stop.

Sell your car and buy a Honda, then have a blast.

thank you guys, and sorry i would rather post and have people tell me than go searching (very busy working) thank you for the budget guide, maybe a bit more than i thought, (i knew it'd be alot) thanks very much, jordi

i was told by a quilified mechanic how to do it and what i would need, he said it'd be alot and i thought about having a look why is every body on here so criticizing on here, but thanks to the few

You might think people are to critical and abrupt but your asking questions that you would have found the answers to had you Been bothered to search.

If your to busy to do a 10 min search how would you have found the time to perform the mods??

That's why. We're busy people too.

Hi Jordi, here's a question for you.


What is it that you are trying to achieve, by turbo-charging a 3ltr v6 engine, please?

I really would like to know.


Just looking at the numbers should tell you all you need to know, bare in mind all cars weigh roughly the same:

3.0 v6 - Power: 179 kW , 240 HP SAE @ 6,800 rpm; 221 ft lb , 300 Nm @ 4,500 rpm

4.0 v8 - Power: 209 kW , 281 HP SAE @ 6,100 rpm; 287 ft lb , 389 Nm @ 4,300 rpm

4.2 v8 - Power: 219 kW , 294 HP SAE @ 6,000 rpm; 303 ft lb , 411 Nm @ 4,100 rpm

4.2R v8 - Power: 291 kW , 390 HP SAE @ 6,100 rpm; 399 ft lb , 541 Nm @ 3,500 rpm

Here is my advice - forget the dream of turboing your S Type now and instead just buy an S Type R.

I have turbo charged a NA Mercedes in the past and it cost a fortune. In the end, it would have been cheaper for me to buy an AMG version of my old Mercedes and it would have come with more power, better resale, cooler interior, seats, bodykit, etc. and better brakes.

To turbo an NA car you can only run low boost (i.e., 5 PSI) which is nothing, def not worth the money, hardly any power gains. My old turbo'd Mercedes was still slow given the cost of the car and what I put into it compared to what I could have traded my car in and purchased.

To run proper boost you would need to lower compression, get forged pistons/rods, etc. and tune. Its not going to happen unless you dump many thousands into it. And then even if you build the motor to handle proper boost, your tranny likely won't be able to handle the power. And on top of that, you would probably need wider wheels to handle the power ($$$) and then a big brake kit to stop the thing (again $$$). Theres a lot that goes into making a normal sedan into a super sport sedan. Thats part of the reason (other than the hype to the name) that one is well into the six figure range for an otherwise normal Mercedes E Class once its been modified by the likes of RENNtech, Brabus, Etc.

If you just sell your car and buy an S Type R, you get the cool interior, the powerful engine, the big brakes, proper suspension, and an ECU mapped to bring it all together. Its like buying a mega dollar tuner car on the cheap.

Here is an example - the previous generation Nissan Xterra was offered as a supercharged version. All they did was slap a supercharger on, and it only made 3 PSI!!! Thats because they didnt want to spend the $$ coming up with a whole new engine. I think the MazdaSpeed Protege was the same story, that car only made like 5-6 PSI. Its not worth it. Surrender now to an S Type R and let this thread die.

This forum is filled with people who REALLY, REALLY know what they are talking about. They come from all walks of life, all age groups, and all Jag experience levels. And they are more than willing to help anyone who has questions and is respectful of the answers given.

But there are forum rules for a reason, and you should familiarize yourself with them before going any further. Your ignorance about forum etiquette, your lack of research before posting your questions, and your belief that you are busier than others on this forum is insulting.

Don't expect much in the way of hand-holding by forum members on your project as most of us are way too busy.