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Old Nov 30, 2012 | 08:00 PM
  #1  
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Default power?

Best and cheapest ways to get more power out of the 4.0?
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Old Nov 30, 2012 | 08:03 PM
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From: Vegas
Year: 1992
Model: Cherokee
Engine: I6
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swap in a SBC. really think of how long jeep ran the inline 6 without any major changes. It is pretty much at its limit unless you are doing big stuff like cams and stroking it or F.I.

Cheap stuff like injectors, air filter/ intake, better header and exhaust, throttle body. 99up intake swap.
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Old Nov 30, 2012 | 08:09 PM
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From: Colorado
Year: 1992 Cherokee Sport
Engine: Bone-Stock 242
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Mopar 703 Fuel injectors off a Dodge Neon 2.0 will help with throttle response, not to mention you'll have CLEAN injectors too if you prep them right.
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Old Nov 30, 2012 | 10:07 PM
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Originally Posted by The_ocho
swap in a SBC. really think of how long jeep ran the inline 6 without any major changes. It is pretty much at its limit unless you are doing big stuff like cams and stroking it or F.I.

Cheap stuff like injectors, air filter/ intake, better header and exhaust, throttle body. 99up intake swap.
+1
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Old Dec 1, 2012 | 04:23 AM
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Its got an aftermarket heaser, not sure what kind, and an after market exhaust. I like the idea of those injectors. Will boring it be worth the effort?
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Old Dec 1, 2012 | 04:56 AM
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From: Broward County Fl.
Year: 1989 xj sport 2dr
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Engine: 12 hole bosch Injectors
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Unless a complete setup is done - meaning built stroker your just gonna get little extra horses here and there
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Old Dec 1, 2012 | 05:29 AM
  #7  
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
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Originally Posted by 97xjCrow
Its got an aftermarket heaser, not sure what kind, and an after market exhaust. I like the idea of those injectors. Will boring it be worth the effort?
No. Because to bore it, you have to completely disassemble the engine and you might as well rebuild it.
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Old Dec 1, 2012 | 05:34 AM
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Year: 1989 xj sport 2dr
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....
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Old Dec 1, 2012 | 05:47 AM
  #9  
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Woahhhh. That sounds nasty.
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Old Dec 1, 2012 | 07:40 AM
  #10  
cherokee outlaw's Avatar
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From: White Cloud,Michigan
Year: 1996
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Engine: 4.0L I6 HO
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Sounds like a tractor. Wish the person would have revved it.
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Old Dec 1, 2012 | 08:58 AM
  #11  
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From: Vegas
Year: 1992
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Sounds like he is running an open header. I doubt it would be that choppy with a full exhaust
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Old Dec 1, 2012 | 09:48 AM
  #12  
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X'S 2 on the open header. There are also the acoustics of the building that are enhancing the sound.
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Old Dec 1, 2012 | 09:57 AM
  #13  
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From: ☼ Blackhole Sun
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Pro tip:
Noise makes noise, not horse power.

(I did like the disappearing odometer when he started it tho, pretty slick.)
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Old Dec 1, 2012 | 10:59 AM
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From: Fort Erie, CANADA
Year: 1987
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Engine: 4.0
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Originally Posted by freegdr
Mine sounded like that without a muffler and a stuck valve! I agree:Noise doesn't mean HP. My 8HP lawn tractor is really loud!
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Old Dec 1, 2012 | 03:34 PM
  #15  
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From: Parham, ON
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Originally Posted by Turbo X_J
(I did like the disappearing odometer when he started it tho, pretty slick.)
I watched the full vid on YouTubs, that's him turning on the head lights, odo dims

Originally Posted by 67 GMC
Mine sounded like that without a muffler and a stuck valve! I agree:Noise doesn't mean HP. My 8HP lawn tractor is really loud!
lol Yeah doesn't sound like my idea of a performance vehicle Maybe something I'd sell for scrap tho
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