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Unread 02-02-2013, 10:23 AM   #1
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1992 YJ Wrangler 
Join Date: Nov 2012
Location: Clarkston, Washington
Posts: 4
2.5L more horse power?

Hello, I have a 92 YJ and was doing some reading an saw that if I add a a throttle body and spacer off a cherokee and and a cold air intake I could boost up the HP a tad. So what would I look for in the parts so I know they would work

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Unread 02-02-2013, 05:36 PM   #2
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1997 TJ Wrangler 
Join Date: Aug 2011
Location: Hull, Iowa
Posts: 163
All cold air filters do is let in more dirt into the engine, suck in the oil from the filter and lighten your wallet
why buy when you can build?
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Unread 02-03-2013, 10:14 AM   #3
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1989 YJ Wrangler 
Join Date: Nov 2010
Location: Sin City, Nevada
Posts: 2,881
Best performance increase for the mighty 2.5L is to regear. I know it is not what you want to hear. However there are several mods that will give you a little. 4.0 Throttle body upgrade, electric fan are a couple I have considered but not yet attempted.
89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.

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Unread 02-03-2013, 07:37 PM   #4
XJ on 37's
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1998 XJ Cherokee 
Join Date: Jul 2006
Location: missouri via blackpool,lancs.
Posts: 10,625
I tried most of them on my old '91 YJ.
By far the biggest gain was going to 4.88's. The TB spacer, electric fan, etc were a waste of time to be honest.
With 35's and 4.88's, you still tried anything at all to avoid the interstate, or any other 70mph road. It was a dog, and drank fuel seeing as you have to keep your foot buried to make it move.
best thing I did was swap a 4.3 and 700R4 into the rig. I actually enjoyed driving it then!

1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.
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1998 Range Rover with a 6.0 LSx
1994 YJ, 4.3/700R4/OME SOA, etc
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4.3/700r4/new frame buildup (YJ)....
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