thewolf

Greetings,
I own a '99 Jeep Cherokee 4.0L and now that I have a steady job, would like to put some money into it as far as performance upgrades to really make it my own. I'm new to this, so I figured I'd start with the simple question of, where do I start? I would like to see some significant HP and torque increases for the least amount of dough possible, IF possible. Could someone help me out as to the steps I should take to start out with? Thanks

jeep98cherokee

I would say start with the air intake, you don't have to get a k&n to see results. They sell off brand air intakes that are similar to k&n at advanced auto or auto zone for 50 bucks...roughly. you would just have to make a custom tube for it.

thewolf

I will for sure get the air intake, and possibly a new exhaust system, spark plugs, wiring, etc (basic tune up). Then I might get into cams/headers/throttle body, etc. Or hell maybe stroke it. I just don't know what order to do these things in haha

Gee oh Dee

Pretty much everyone here will tell you that unless your doing a snorkel upgrading the intake is a waste.

The 4.0 came pretty much maxed from the factory. Regearing is the way to go. But its really not needed til you start trying to spin 33s or bigger.

Go with a mild lift 3" or smaller and go from there. Until YOU know what you want you will never be satisfied.

thewolf

I know I want a 4" or so lift, and I will be going with bigger tires. Not obnoxiously big, but enough to make it look a little beastly. Also, I'd like to try and get into the 250-270 HP and 270 Torque range. Being new, I don't know what kind of mods would get me there. That's why I'm here. Hell, as much HP and torque I can get, without getting 8 MPG.

blue_on_blackXJ

That's a lotta extra ponies man. That constititutes stroker/turbo etc but it sounds like your expecting that. No bolt ons will ever make that. I did put an open k&n 6x9 filter on my rig withouth the factory air box and did notice a little more get up and go

Gee oh Dee

why do you need so much extra power? Its honestly not needex

Did you get any numbers for the difference?

thewolf

Why? Why not haha...

And yes, Im expecting it to be more than just popping on an exhaust and air intake..

thewolf

Would a supercharger make my tranny fall apart?

It's either supercharge it, stroke it, or put a smallblock chevy 350 in it...suggestions?

Gee oh Dee

Go with a V12

Bustedknuckle

Avoid alot of headache. Seach "supercharger" and youll find all the answers you ever did and didnt want to know.

If you want to drop over $4k into your motor for 50 hp, go for it.

This.

xPlover24x

youre talking about extreme mods? i thought you were new?

just get a 302 modular engine from a junker car. you dont need a 350 to make power.

supercharging is a total waste of time

the HO 4.0 already has all the things you said, bigger throttle body, better cam, better intake mani

you can however get an exhaust mani and better exhaust system and intake but youre not getting no 270hp

thewolf

I found a 290HP, 340 ft lb stroker kit for $1765

xPlover24x

and you get what you pay for

thewolf

That didn't seem like a bad price considering a supercharger would give similar numbers for 4k + am I wrong?