Let me take a stap at this again; First of all, the eFan will help, as it will release about 5HP up (you will not gain this, but will not waste it on the fan as you are currently doing with the mechanical fan). 5HP is a huge gain when considering the 2.5L. The reason for the Ford fan is that it is argubly the most powerful fan out there as far as CFM goes (it pulls more air than any Flex-a-lite or other aftermarket fan), but you need to consider when you install it how to control it; this can be by hand (a simple on-off switch), a thermo switch (automatically turns on the fan at a predetermined temp), or a controler (that increases the fan speed as the temp goes up automatically; this is the most expensive option, but in my opinion, it is also the best option, as starting at a lower speed pulls less amps, which also means you can keep the stock alternator if you need to).
Now, there are other options you can look at to increase power on the 2.5L; the basic ones, would include:
1. Air intake: Look at high high flow filters to make the engine breath a little easier. Some will argue that the removal of the restrictors in the air box (some Jeeps have one and some have 2) will help, but this has not been demonstrated, and others argue that it just moves the torque band higher up. Read around, and decide what YOU want to do on this issue, as I dont want to open a can of worms here... Another choice is to go with a CAI or Snorkel. Personally, I went with the snorkel (not only protects the engine from hydrolocking when crossing rivers, but the air is coming from OUTSIDE the engine compartment, so it's theoretically cooler), but some CAI setups do work nicely (not all are the same; look around, research and make an intelligent decision before you buy!).
2. Injectors: You can change to the Design III injectors, which produce better atomization of the fuel, and have a bit more flow than the stock ones. Here I would most defenetly suggest you look at the FAQ section of 4bangerjp.com to be sure you get the right ones, as if you look just at flow, you can easily be misled, as different injectors are measured at different pressures...
3. Ignition: I strongly recommend stepping up to a Performance Distributors setup for the 2.5L with good ol regular plugs. Then you can re-gap your plugs to .060" for better combustion. The setup includes a Screaming Demon coil, Live Wires, rotor and cap.
4. Exhaust: Now that you have more fuel (with better atomization), more air (to be able to burn more fuel), and an improved spark (for better combustion), you need to get rid of all the exhaust. In my book, the main issue here is the Cat and the Muffler, so I recommend a high-flow cat (I bought a Magnaflow one for under $100) and a good cat-back system (I really like Borla; their warranty is the best! I also used Gibson for a while, and it was also good). You can also look at headers, but make sure these are designed for low end torque (many are designed for Horse Power, which you do not want).
You can also look at other alternatives, like overhauling the engine, changing cams, roller rockers (to reduce friction), turbos, and superchargers, but all of these tend to get more expensive than the ones above...
Anyway, hope this helps!
Felipe
