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post #1 of (permalink) Old 04-20-2003, 03:49 PM
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Gain 10 HP on YJ for free

I have just seen a post at jeeponly.com How_tos/ that stated that on 91/95 YJ if you remove the tapered horn inside the air hose where it attaches to the air filter box it will increase the air flow into the engine thus increasing HP/performance has anyone done this and will it work.

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post #2 of (permalink) Old 04-20-2003, 04:23 PM
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Re: Gain 10 HP on YJ for free

1. Welcome to the forum.
2. Thanks for filling out your user profile.
3. Read the New Posters Message at the top of the forum.
4. Participate more often!
5. Two brains are always better'n one!
6. The modification you describe is an effective one,
7. It does work, however,
8. I've never seen actual HP gains certified...
9. It is all "seat in the pants" type backyard engineering.
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post #3 of (permalink) Old 04-20-2003, 05:34 PM
 
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Re: Gain 10 HP on YJ for free

Hey yeedoggy ......
And welcome aboard.... [img]images/graemlins/laugh.gif[/img] Indeed the mod you mentioned is indeed very effective and is only a mattter of common sense... It's reportedly said that Chrysler had installed that air restrictor in order to limit horsepower in YJs compared to XJ Cherokees whixh sport the same exact 6 cyl engine.
However and as Leve (the Guru here) rightfully said...there have been no facts on paper about the HP gain.... I only know that the YJ is rated at 180 HP and the XJ at 190 HP.....
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post #4 of (permalink) Old 04-20-2003, 05:47 PM
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Re: Gain 10 HP on YJ for free

Thank for the reply, So even if this may-not get 10Hp
extra, by taking this out do you guys thank is will not
hurt anything.
post #5 of (permalink) Old 04-20-2003, 06:00 PM
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Re: Gain 10 HP on YJ for free

No, it won't hurt anything.
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post #6 of (permalink) Old 04-20-2003, 09:46 PM
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Re: Gain 10 HP on YJ for free

I took mine out and haven't had any problems. I didn't really notice much difference either though.

If you really want to add some horsepower to your Jeep, get a spoiler or get some racing stripes to stick on it. Those are good for atleast 15hp out of the box. If you do some fine tweaking, and maybe add a coffee can muffler, you could easily pull 40hp!
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post #7 of (permalink) Old 04-20-2003, 10:13 PM
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Re: Gain 10 HP on YJ for free

That's right! Lowering it and tinting the windows helps too... [img]images/graemlins/grin.gif[/img]
post #8 of (permalink) Old 04-20-2003, 10:40 PM
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Re: Gain 10 HP on YJ for free

Where in AR are you? Heber Springs?
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post #9 of (permalink) Old 04-21-2003, 01:24 AM
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Re: Gain 10 HP on YJ for free

i pulled the horn out of my 94 yj 2.5, i did'nt notice any odvious changes, but there is a louder air sucking noise then before. its not loud enough to be annoying though. did it help, with out a dyno who knows. it sure didn't hurt. good luck on your decision. [img]images/graemlins/thud.gif[/img]
post #10 of (permalink) Old 04-21-2003, 10:30 AM
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Re: Gain 10 HP on YJ for free

Now if you really want to add lots of horsepower, and get super mileage too - buy every mileage saving and horsepower increasing device in JC Whitney's catalog. They have probably over a hundred.

"They" say if you put them all on though, it becomes a pain - you have to stop every few miles and drain the gas tank, since it's so efficient it "makes" gas.

Watch that throttle too - at speeds approaching the speed of light it burns the fender's paint.
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