is there any way to get just a littel more power out of my 2.5L My jeep is running 31s and is a 5 speed don't know what gears are in it but really didn't want to get in to gearing it and one more ??? can i run a diff locker on the road don't know to much about them i know i would love to get them put in i hate my 2 wheel drive 4x4 lol
You are wasting your time and money. I've done about every little crap thing you could do to the 2.5 and none of it made a hill of beans to actually making the Jeep any different. You (and anyone else here) will tell yourself, "yeah, I can feel it!", but it's just not going to magically change your overall situation of low 100's HP pushing a 3500 lb box. I eventually went to 33" tires and the only change I made to make mine drivable again was re-gearing to 4.88 (you now have 4.10).
You want nice power, enough to push a modded Jeep? Swap the motor or buy a different Jeep.
i have a 2.5L with 35's. drive it down a freeway at 60mph everyday for 40 min. only thing i did has put a header on and we had the intake bored out. you can put a 4.0L throttle body on a 2.5. thats where i get my power from, also have a ford 8.8 and dana 30 which both have 4.88 gears
If you are not going to go any bigger in tire size the best thing you could do is re-gear to 4.56's. I ran the 4.10's & 31" tire combo for a couple of years. I re-geared to 4.88's and ran the 31's for a few months till I got the 33's.
It made a big difference.
Or you could go back to a stock sized tire...........
There is nothing you can do to that motor that will = the right gear/tire combo.