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08-27-2009, 10:45 AM
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#1
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Registered User
Join Date: Aug 2008
Location: oregon
Posts: 98
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how do you know if engine is 2.5 high output or low output?
how do you know if your engine is a 2.5l high output or low output? 
its a 1995 2.5l 4 cyl
thanks
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1995 YJ Wrangler
/l ,[____],
l---L –[]lllllll[]- 1995 YJ Wrangler, 4 cyl 2.5
()_)-()_)--o-)_) high schooler doing what he can
Originally Posted by squibload
[travolta]You don't **** with another man's automobile.[/travolta]
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08-27-2009, 10:50 AM
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#2
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Registered User
Join Date: Feb 2005
Location: B-Burg, Ky
Posts: 311
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Low output is stock with 22 horsepower, High output has about $3000 worth of aftermarket parts bolted to it, and makes 24-1/2 horsepower. 
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'95 YJ 4.0L/AX-15
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08-27-2009, 10:51 AM
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#3
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Registered User
Join Date: Jun 2009
Location: Las Vegas
Posts: 171
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They're ALL low output! LOL, I had the decal on mine that said 2.5L Low Output, matches OEM 4.0L decal. People would ask me if it came from factory that way and laugh
[IMG]  [/IMG]
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1988 YJ 2.5, again!
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08-27-2009, 10:52 AM
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#4
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Registered User
Join Date: Dec 2008
Location: Duluth, Minnesota
Posts: 3,000
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There is no 2.5L High Output. Only in your mind.
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08-27-2009, 10:53 AM
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#5
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Registered User
Join Date: Jan 2004
Posts: 527
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They are all low output. 
"High-output" was really a term given to the 4.0L when it transitioned from Renix fuel injection to Chrysler MPFI.
There are 2.5L High Output and 2.5L Low Ouput stickers floating around but those never came from Jeep.
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'94 YJ - 34x10.5 Super Swaper LTB "pizza cutters", 2.5L/AX5/231, D30/8.8 4.88, 63mm throttle body and manifold, electric fan, Dynomax exhaust, SYE/CV, SOA on stock springs, MORE traction bar, Teraflex tummy tuck, Milemarker 9500 hydraulic winch, various skids
'06 LJ Rubicon - 31" Trxus, OME 2.5", belly up, various skids
'75 CJ5 basketcase
brewcitycrawlers.com
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08-27-2009, 11:00 AM
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#6
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Registered User
Join Date: Jul 2004
Location: Indiana
Posts: 1,807
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Mine is a high output. It is stock and will go down the interstate at 80 mph with 35's.
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"Our lady of blessed acceleration don't fail me now"
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08-27-2009, 11:24 AM
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#7
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Registered User
Join Date: May 2007
Location: Prescott, Arizona
Posts: 921
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Quote:
Originally Posted by 1998zj
Mine is a high output. It is stock and will go down the interstate at 80 mph with 35's.
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And probably cruising at 4k RPM too.
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Black '91 YJ, pretty much stock for now. Finished engine rebuild. Runs beautifully.
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08-27-2009, 11:29 AM
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#8
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Registered User
Join Date: Jan 2009
Location: United Kingdom
Posts: 75
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08-27-2009, 11:30 AM
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#9
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Registered User
Join Date: Jul 2004
Location: Indiana
Posts: 1,807
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You know it. It is the only way to get any power out of a 2.5. Mine has 185,000 and still going strong, I can't kill it. I was doing donuts in the sand bouncing off of the rev limiter and it wouldn't blow. I have a 5.0 Ford to put in it when it lets go.
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"Our lady of blessed acceleration don't fail me now"
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08-27-2009, 11:56 AM
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#10
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Registered User
Join Date: Oct 2005
Location: Northeast Florida
Posts: 387
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Quote:
Originally Posted by BlackRhino
And probably cruising at 4k RPM too.
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So what? Old CJ-5s had a 3 speed tranny and geared for stump pulling...top speed about 60mph. Jeeps have/should never be about top speed. You want speed? Buy a Mustang GT.
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1995 YJ, 2.5L, RE 4" lift, 0" Body lift, JB SYE, Woody shaft, FoMoCo e-Fan, 4.0 TB, 19lb Ford Style 3 Injectors, American Racing Bajas, 33" Toyo A/Ts
/l , [____],
l---L--[]lllllll[]-
()_) ()_)==@=)_)
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08-27-2009, 12:05 PM
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#11
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Web Wheeler
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 10,753
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High output must be refering to the change from TBI to Multiport injection in 1991. It gives you a whopping 15 extra ponies. Any for your jealous 4.0l take a look at my pic and remember don't piss off my 4 angry squirrels! LOL
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08-27-2009, 12:08 PM
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#12
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Registered User
Join Date: Jun 2009
Location: Mesa, AZ
Posts: 95
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The low output one is the one with the restrictor plate, they used them to keep the rear axles together during the warranty period.
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08-27-2009, 12:19 PM
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#13
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Registered User
Join Date: Jul 2004
Location: Indiana
Posts: 1,807
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Quote:
Originally Posted by dos0711
You want speed? Buy a Mustang GT.
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I have one of those too.
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"Our lady of blessed acceleration don't fail me now"
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08-27-2009, 12:31 PM
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#14
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Registered User
Join Date: Oct 2005
Location: Northeast Florida
Posts: 387
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Quote:
Originally Posted by 1998zj
I have one of those too.
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Then you sir, are a lucky dawg! 
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1995 YJ, 2.5L, RE 4" lift, 0" Body lift, JB SYE, Woody shaft, FoMoCo e-Fan, 4.0 TB, 19lb Ford Style 3 Injectors, American Racing Bajas, 33" Toyo A/Ts
/l , [____],
l---L--[]lllllll[]-
()_) ()_)==@=)_)
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08-27-2009, 12:49 PM
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#15
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Registered User
Join Date: Jul 2009
Location: NJ
Posts: 214
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Shouda got a Fox if you wanted to be real lucky.
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>
how do you know if engine is 2.5 high output or low output?
