Hello, does anyone know or have any tricks to adding a few more horses to your disco. I have an 03, the 4.6 isn't bad at all I just want a little more. I don't want to supercharge it though. I also don't want to spend too much money.

 

Unfortunately you won't be able to do anything significant without dumping a lot of money in.

 

Pretty well stated, very little that be changed to improve your power, unless you enlarge the head, throw in a cam lifter and stronger springs, a set of headers and a cat back.
I wouldn't touch your engine though till you find out if it is on Rovers hit list for a possible oil pump/engine failure.