I need to bounce possible ideas off other Jeepers..
12-24-2009, 08:51 PM
#1
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Year: 1990
Model: Cherokee
Engine: renix 4.0
I need to bounce possible ideas off other Jeepers..
I have a 1990 Jeep Cherokee 2 dr. with the 4.0l..the year before they switched their stuff mechanically.
So i propose the question..
Should I presume doing performance upgrades to it, or should i just drive the jeep (as it is my 2nd/winter vehicle)..because I have noticed their are not as many upgradable parts for this engine as there is for the newer 4.0l.
So i propose the question..
Should I presume doing performance upgrades to it, or should i just drive the jeep (as it is my 2nd/winter vehicle)..because I have noticed their are not as many upgradable parts for this engine as there is for the newer 4.0l.
12-25-2009, 05:43 AM
#3
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Year: 87
Model: Cherokee
Engine: 4.0
The biggest and best performance upgrade you can do to the renix era motors is a fuel injector swap. Going to bigger injectors is about it as far as performance mods.
A warm air intake will cause you to burn more fuel, the headers well.. only flow marginall better then stock.
A warm air intake will cause you to burn more fuel, the headers well.. only flow marginall better then stock.
12-25-2009, 05:49 AM
#4
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For your "second" winter vehicle....just invest in some good, cheap tires from treadwright.com/ I have two sets of tires from them and they work great and look good.
Maybe a mild lift...3 1/2 inches or less, and
change all fluids.
Done.
Maybe a mild lift...3 1/2 inches or less, and
change all fluids.
Done.
12-25-2009, 09:25 AM
#5
I like it in the dirt
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Year: 2003
Model: Grand Cherokee
Engine: 4.0
That is all garbage! You can so race a renix if you want! Rocker cam, bore it out! Turbo! Just cuz its a renix does not mean its handicapped.
12-25-2009, 04:00 PM
#7
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Year: 87
Model: Cherokee
Engine: 4.0
I suppose you can but how are you going to capitize on the gains when you really cant do anything to change the timing curve or increase the fuel air ratio. I want to know more.
I also think he was talking bolt on mods.
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12-25-2009, 04:13 PM
#8
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Year: 1990
Model: Comanche
Engine: 4.0 I6
stroke it... drop a newer head on it... heck drop a newer 4.0 in it... its not that hard... i did mine without even swapping a harness... 4.0's are a dim a dozen... all over craigslist... anywhere from $250 to $450 for the newers... complete motors... easyas pie! or you can buy a newer 4.0... stroke and build the crap out of it till the renix dies... then you got one to swap in thats bad ***... was kinda thinkin bout doing this myself Vs. building the motor in my jeep and it being down for a very long time...
12-25-2009, 04:15 PM
#9
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Year: 1990
Model: Comanche
Engine: 4.0 I6
ive also seen people make a "throttle spacer" That converts the intakes 3 hole bolt pattern to the newer TB 4 bolt pattern... anythings possible!
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