help want to upgrade motor
#4
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Location: Louisville,KY
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Model: Cherokee
Mods and cheap never mix.I would start with a full tune up then go exhaust.What size are your tires on it?Going bigger tires with out gearing it to match will make it slower and harder on fuel.
#7
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Year: 1993
Model: Cherokee
Engine: 4.0 ho 99 intake ps pump 1" tb spacer 62mm bored tb eletric fans and more
junk yard injectors can be found cheap sometimes think my neon ones cost me $25 for 8
if you have a welder you can build the exhaust get ride of the dent in the down pipe. but to be-honest some cheap mods might get you off idle response but not huge gain the 4.0 is a work horse in stock trim wont when you a lot of power awards but will get you there.
if you have a welder you can build the exhaust get ride of the dent in the down pipe. but to be-honest some cheap mods might get you off idle response but not huge gain the 4.0 is a work horse in stock trim wont when you a lot of power awards but will get you there.
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#9
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Join Date: Feb 2014
Location: Florida
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Year: 2000
Model: Cherokee(XJ)
Engine: Golen 4.6L
The 4.0L sounds like an oversized lawnmower if you cheap out on the exhaust. So yeah, you can buy a crimped downpipe and lawnmower pipes for your XJ for less than $100, but I really don't understand why you would want to.
#11
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
I don't understand the logic behind replacing the dented mandrel bent OEM downpipe with a crush bent Walker downpipe. I would think that any advantage you would get from removing the dent would be offset by the turbulence in the airflow introduced by the folds in the crush bends. That Walker pipe seems like a waste of money unless your OEM downpipe is rotting and just needs to be replaced.
Would the turbulence matter around 4000 RPM? Maybe... I still believe it's a lesser evil than the dent. I don't know what a Jeep inline 6 would be doing at 4000 RPM anyway.
#13
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Year: 99
Model: Cherokee
Engine: 4.0
Turbo. Spray it. Cast iron, son!
Whenever I become rich and don't need this thing, I'm strapping 35's and a nitro kit to it and running it up a wall.
Whenever I become rich and don't need this thing, I'm strapping 35's and a nitro kit to it and running it up a wall.
Last edited by kgm; 12-29-2014 at 11:39 PM.
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