Faster XJ
Renix Super Guru
Joined: Mar 2008
Posts: 24,653
Likes: 19
From: In yourz postez fissin jurr spelinzs
Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
Well if you really want a brick on wheels that goes fast then you gotta consider these guys for your speed needs Clicky
Seasoned Member
Joined: Apr 2008
Posts: 496
Likes: 0
From: Reed City, Michigan
Year: 1996
Model: Cherokee
Engine: 4.0
this is what i plan on doing after college. i already have a 01 6.5" lift bla bla bla
i would love to get a 99 2 wheel drive. build a 4.7 or 5.0 (like the guy on naxja) he has blueprints. And turbo or supercharge it. Leave it stock height with like some nice 17's or 18's, good street tires. And maybe the china conversion, with dodge intense blue paint
it will be done and will be different. I cant wait keep us posted on what you do
i would love to get a 99 2 wheel drive. build a 4.7 or 5.0 (like the guy on naxja) he has blueprints. And turbo or supercharge it. Leave it stock height with like some nice 17's or 18's, good street tires. And maybe the china conversion, with dodge intense blue paint
it will be done and will be different. I cant wait
keep us posted on what you do
"CF Moderator"
Joined: Sep 2008
Posts: 3,045
Likes: 3
From: N.J. Shore Area
Year: 1994
Model: Cherokee
Engine: l6 HO
I know it doesnt seem to be a popular theme with Jeeps but I am wanting to know some things that can be done to make these things faster, that wont break the bank. I have moded my intake and exhaust, and upgraded my cooling but it just isnt enough for me. I dont care about offroading really but blowing these little ricers doors off is sure a lot of fun.
Thread Starter
Junior Member
Joined: Oct 2008
Posts: 33
Likes: 0
Year: 2000
Model: Cherokee
Engine: 4.0 H.O.
0-60
acceleration is all I really care for, above 60 I could care less. Burnouts are nice to. Another thing I dont understand is I always had the one well peal then I put wheel spacers and bigger tires and now I always get both tires spinning which I love but still dont know how with a open diff.
Seasoned Member
Joined: Aug 2008
Posts: 400
Likes: 1
From: Minnesota
Year: 1999
Model: Cherokee
Engine: 4.0L
My 96 XJ only had one cat with O2 sensors before and after. I cut it off and then took a long chisel and hammer and busted the guts out till it was clean(keep in mind this is illegal in some states and that the substance in the cat makes a toxic dust that you shouldnt breath). On my current 00 XJ it has three cats, two at the header and one before the muffler. They added and moved the O2 sensors to two before and two after the ones at the header. Those would be a pain to get to so I just went for the one before the muffler. Using the same technique I gutted it and had it put back on. On both XJs I could tell a big difference in the sound it had a deeper more throaty sound and on both XJs I have had no check engine light trouble. On the other hand I do think my MPG have went down with the increase in power.
Thread Starter
Junior Member
Joined: Oct 2008
Posts: 33
Likes: 0
Year: 2000
Model: Cherokee
Engine: 4.0 H.O.
How they work
There seem to be two types of cats, the XJs I know use a ceramic style/three way. All it is is a ceramic core with thousands of honeycomb shaped passages. These passages are coated in a silica and alumina coating. Then the catalyst itself is put on the washcoat and varies, it can be magneseum, platinum, rodium, palladium,etc.. The hot exhaust passing over the catalyst cause the core to super heat, those burning off any excess fuel that may pass through. This core is only mildly restrictive to the flow so the power increase is small. A brand new converter isnt toxic but the ash and debris created from the reaction is. So be careful. Another thing is is a PAIN to bust out.
Seasoned Member
Joined: Aug 2008
Posts: 400
Likes: 1
From: Minnesota
Year: 1999
Model: Cherokee
Engine: 4.0L
There seem to be two types of cats, the XJs I know use a ceramic style/three way. All it is is a ceramic core with thousands of honeycomb shaped passages. These passages are coated in a silica and alumina coating. Then the catalyst itself is put on the washcoat and varies, it can be magneseum, platinum, rodium, palladium,etc.. The hot exhaust passing over the catalyst cause the core to super heat, those burning off any excess fuel that may pass through. This core is only mildly restrictive to the flow so the power increase is small. A brand new converter isnt toxic but the ash and debris created from the reaction is. So be careful. Another thing is is a PAIN to bust out.
Thread Starter
Junior Member
Joined: Oct 2008
Posts: 33
Likes: 0
Year: 2000
Model: Cherokee
Engine: 4.0 H.O.
Bust it out
Well the first time I used a piece of 1/2" pipe and a hammer. The second I used a long chisel and hammer like I said in a previous post. It really is a PAIN in the but to get it all out. Looking back with the little increase it gave its not really worth all the sweat.
Junior Member
Joined: Jun 2008
Posts: 63
Likes: 1
From: Chattanooga, TN
Year: 1992
Model: Cherokee
Engine: 4.0L
Greenebean,
Forge the internals and toss a shot of giggle juice on it . . . That should take care of those annoying little ricers. (Doubt the rear and transfer case will like it)
As someone else stated, I love going fast too. I've got a truck to fill my needs on the street. The look on a 'Vette owner's face after he got smacked around my a truck is PRICELESS.
Good luck with whatever you decide to do!
Forge the internals and toss a shot of giggle juice on it . . . That should take care of those annoying little ricers. (Doubt the rear and transfer case will like it)
As someone else stated, I love going fast too. I've got a truck to fill my needs on the street. The look on a 'Vette owner's face after he got smacked around my a truck is PRICELESS.
Good luck with whatever you decide to do!
Senior Member
Joined: Jul 2008
Posts: 803
Likes: 0
From: Reno, NV
Year: 98
Model: Cherokee
Engine: 4L
Well the first time I used a piece of 1/2" pipe and a hammer. The second I used a long chisel and hammer like I said in a previous post. It really is a PAIN in the but to get it all out. Looking back with the little increase it gave its not really worth all the sweat.