Hey everyone, I'm new to this forum and to Jaguars. I recently purchased an 03' Jaguar S-Type 4.2 and am loving it. The only thing is it could use a little...well maybe a lot more power. I'm coming from a 400awhp subaru so the 300 crank stock hp just isn't cutting it. In retrospect I am wondering if I should have just tried to find an S-Type R, but I got a really great deal on this car. I tried doing some research already on how difficult it is to convert an S-Type into an S-Type R(just the motor). Im wondering if you can bolt on a stock R supercharger and if you find a stock R ECU to hook up will it run right or is the engine completely different all together. The one problem I was forseeing and it seems someone on this forum hit a similar snag with their xj8 to xjr conversion is that the compression on the engines is different. If going the supercharger route is not a viable option what options do I have for making more power. I was thinking about a full custom exhaust from the header all the way back to get rid of the extremely restrictive stock exhaust system. Besides that, a performance intake and Engine management or chip are all i have found searching the internet. Any thoughts, advice and guidance would be greatly appreciated. Thanks in advance for any help.

 

Hey, thanks for the info. I do love the car already and Im not looking to make huge power gains as I do intend for this to be my daily driver and to start another build on something else(undecided) in the near future. Knowing that the supercharger is not an option...does anyone have any power numbers for full exhaust inc. header and intake. Im sure that adding these simple mods will give me the placebo effect of feeling as though the car is much more powerful than it is.