Hey guys, since my dad wont let me lift the cherokee...im doing the exact opposite, RACE JEEP!!! i was just wondering what kind of parts i could swap out/add to my jeep in order to make it faster, quicker etc...so anyway, besides makin her breathe better and NOS---> (supposed to look like logo haha) what can i do...all suggestions welcome

 

when i had small tires (235/75) and 4.10 gears it was fast as ****... so i would say regear

 

How fast do you want to go and how much money do you have? It's not any different than any other engine as far as performance. A combustion engine is nothing more than a big air pump, the more air you can get in it the better it performs.

You can start with a bigger exhaust, header, free flowing intake, head porting and polishing, bigger valves, installing a stroker crank, boring out the cylinders for lager pistons, or possibly an engine swap.

Try a search on any of the terms and I'm sure you'll have enough reading until the end of the month....

 

well.... msd egnition... better exhaust...better header...they are pretty fast for having the aerodynamics of a box... do a little searching on this site.. their is plenty of other things you can do

 

whoops .. beat me too it

 

the juice never fails...

1990 2wd 2dr 5spd
5.0 mustang intake filter
msd ignition
computer tricks to make it run richer (although if i did it again id do it different for extra fuel-like split sec or something like that)
3.55 gear swap
open exhaust
a shot of the good stuff.
=13.8's at 104mph on 225/75/15 all seasons

http://www.streetfire.net/video/jeep...anger_1392.htm
me vs a modded ranger that ran 15.2 @ 91 mph

edit: and another vid
http://www.streetfire.net/video/my-j...-runs_2141.htm

 

well i already got a thrush welded on it... im gonna put a high flow cat and a cold air pretty soon. how do you change the gearing on it cuz ill do that...and as far as money goes im willin to drop a couple hundred on it

 

also what would happen if i dropped it haha...i know its like so out of the ordinary but still it should lower the center of gravity right?

 

whenever you start upgrading remember your engine is an equilateral triangle.

air, spark and fuel.

if you upgrade one you need to upgrade the rest.

best of luck!!!

they make super charges and turbos for the 4.0 but they are about 4grand...

 

well, for the absolute cheapest. you could just swap in a junkyard axle from a different xj with a better gear ratio

 

4 cylinder xjs with an stick had 4.10 gears
4 cylinder xjs with an auto had 4.56 i believe

 

yea for the gearing just get either junkyard axles or look on craigslist. 3.55 geared diffs are the most common ratios out there for cherokees.

 

One thing that will help you, that I don't see anyone doing is using exhaust wrap to cut back on the unde rhood temps. You could do it if you removed the intake manifold. I personally would avoid removing the exhaust because the probability of having a broken bolt and having to drill it out is high. I'm not lucky when it comes to drilling out bolts (even with using a left handed bits and a drill) or using an ez out.

The one thing you could do that's a cheap fix is pulling out the restrictor in the air box. I'd also recommend getting another air temp sensor. Go to a yard and pull one and the wire harness connector. Chances are it will be good after you clean it up. Splice an extension so you can just plug in your new sensor, mounted on the side of the air box. Just drill a hole, and screw it in. Its plastic so it will self thread. Leave the original in its place to act as plug/seal on the manifold. During the winter you unplug and use the one in the manifold and during the summer use the other on your air box.

If you use the airbox sensor during the winter, you'll have longer warm ups but it will run leaner, decrease mpg and give you dash of cheap power.