Looking to improve performance on cherokee
#1
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Year: 2001
Model: Cherokee
Engine: 4.0
Looking to improve performance on cherokee
i have a 2001 Cherokee Sport 4.0 liter. I have already lifted and modified it. Now i am looking for ideas to improve the power of the engine. Any thoughts are appreciated. thanks.
#2
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Location: Oak Harbor, WA.
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Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
Cold air intake (3 inch cone filter and air tube style). 2.5 inch exhaust with high flowing muffler (I used a Flow Master 40). You can put a header on it but, if your Jeep is a 91 or newer the OEM tubular manifold works a s good as any header IMHO. Making a better air pump always increases power. If you have a pre 99 XJ, putting a 99+ intake manifold on gives you about 15-20 more HP. I haven't done this yet but, installing an overbored throttle body really wakes up a 4.0 from what I hear. The ignition is already as good as you'll ever need so, the only other thing I would recommend (and I haven't done this yet) is put a bigger cam in it. I hear Crane make s a good RV type cam for the 4.0.
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Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
X 2, re-gear to 4.56 or 4.88, first. You're definitely feeling the poor performance from your Jeep as a result of the 33s with stock axle gears. All the go-fast equipment in the market won't fix that problem, correctly. I have 4.56 gears with 33s, a cold air intake and 2.5 inch exhaust. My XJ has all the power I'll ever need and it still gets 18-20 MPG on the highway.
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#8
yep... what every one else says... 40 series exhaust kicks a$$, intake is a must if you do exhaust. put an electric fan on instead of belt drivin, yours might already be electric?
#10
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Year: 1998
Model: Cherokee
Engine: 4.0
X 2, re-gear to 4.56 or 4.88, first. You're definitely feeling the poor performance from your Jeep as a result of the 33s with stock axle gears. All the go-fast equipment in the market won't fix that problem, correctly. I have 4.56 gears with 33s, a cold air intake and 2.5 inch exhaust. My XJ has all the power I'll ever need and it still gets 18-20 MPG on the highway.
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