clayton3854

my buddy has an xj and while i use mine to wheel he is more into making his go faster and more hp. what are some upgrades or mods he could do to enhance his speed and hp?

mobilecherokee4

exhaust, cold air intake, bore out the throttle body, computer programmer

clayton3854

ok thanks ill tell him that and try helping him get this stuff

offroadnut36

You should tell him to research about making his engine a stroker. I forget what horsepower you could get out of it but I think it was in the high 200s, like 280+

mobilecherokee4

yeah good thought

BuckB91XJ

Install 2.5 inch exhaust.

Install a 99+ intake from a 4.0 XJ or TJ

Install 63mm Throttle Body

Install 3 inch intake with quality cone air filter

Crane a hotter grind cam for the 4.0

Port your head to match the 99+ intake

You might want to try one of the chips on the market

Anything else is gonna involve boring, stroking and bigger pistons.

There is a Super Charger made for the 4.0

Even with the stock size tires, going to 4.10:1 gears will quicken it up

okcjeeper

One word Stroker, then bored tb, port and polish head and port match intake, ram air intake where you actually get cold air instead of hot air, upgraded injectors, adjustable fuel pressure regulator to match.. That should get ya started.

G_P

Hopefully he does not plan on street racing this thing. The first sharp curve at high speed and he will be rolling off into oblivion.

STROMVADER

Look at my build thread under project X-jay. I made a functional ram air intake from a dryer vent. It can be plugged w/ an Oatey brand, expanding plug. It was less than $30 and INHALES air at speed. You can actually look in the vent and see the cone filter. Tell him to search on ebay for Cherokee specific cold air intakes. I got mine w/ a no name cone filter, polished aluminum intake tube, and 90 degree bend for $32 shipped to my door. The seller had a best offer option which was cool. Hope this helps!

MasterShakeXJ

tell him to buy a car . haha

sean882

Going to 4.1's will give you more acceleration, and more torque at the wheels. I don't believe it will speed you up overall though. Getting a lower final gear ratio will give you more top-end speed.

clayton3854

haha i told him that but he said no bc we live in western ma and he wants the jeep for our big winters

FlyingLow

Don't stock jeeps top out around 130 something? Idk how much more speed you need in a jeep