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Old 04-28-2009, 10:57 AM   #1
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more power?

I have a 2004 Sport, 6cyl, manual with the stock 3.73 trac loc rear axle. I'd like to get some more power without risking any engine damage. I've searched the posts and have found a few on intake/exhaust and chips. I'm not a do-it yourselfer. I'm just looking for a few simple tips. I've pretty much ruled out chipping it based on what I've read here. Anyone ever seen a wrangler with dual exhaust? I haven't, and i certainly don't want my jeep to sound like a '94 Chevy K1500 that the local high school kid hammers around town, but I'm not opposed to a slight increase in noise. Thoughts?

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Old 04-28-2009, 11:16 AM   #2
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You'll find that most folks here will tell you to not waste your money on aftermarket "performance" crap. The benefits just aren't there. Our 6-bangers are designed to produce torque, not much else. Get a 5.0 Mustang if you wanna' go fast. A larger diameter exhaust with a free flowing muffler will help some and definately sound better. You're stuck with a "brick" with wheels. Save your money up for some taller gears.
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Old 04-28-2009, 11:18 AM   #3
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ok, so i just found something called "Banks Ram Air Intake System". It claims to gain up to 39% horsepower and 69 foot pounds of torque over stock intake. They want $250 for just the parts, then I'll have to pay someone to install it. Anyone familiar with the Banks product?
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Old 04-28-2009, 11:31 AM   #4
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Those are supercharger type performance gains...there's nothing on the market that I know of, that'll give you those numbers for $250. Go buy a top quality high-flow air filter for $30 or so...go back and read the description of that system again. I think you'll find that the "airflow" is 39% better than stock.
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Old 04-28-2009, 11:49 AM   #5
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here's where i found it, check it out for yourself and tell me what you think.....

4.0L 6 Cylinder Ram Air Intake System by Banks and Other Jeep Parts and Jeep Accessories by 4 Wheel Drive Hardware
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Old 04-28-2009, 11:50 AM   #6
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Quote:
Originally Posted by johnnykane View Post
I have a 2004 Sport, 6cyl, manual with the stock 3.73 trac loc rear axle. I'd like to get some more power without risking any engine damage. I've searched the posts and have found a few on intake/exhaust and chips. I'm not a do-it yourselfer. I'm just looking for a few simple tips. I've pretty much ruled out chipping it based on what I've read here. Anyone ever seen a wrangler with dual exhaust? I haven't, and i certainly don't want my jeep to sound like a '94 Chevy K1500 that the local high school kid hammers around town, but I'm not opposed to a slight increase in noise. Thoughts?
Just remember to keep in mind, it's a Jeep...not a Corvette. LOL
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Old 04-28-2009, 12:07 PM   #7
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the wrangler intake was designed to be unrestrictive.. buying any intake will give you minimal gains.. chips will give no gains because you have to floor jeep to activate chips.. if you want more horsepower regear your jeep, install supercharger, turbocharger, or stroker kit, or new engine, the bolt on horsepower stuff doesnt really give gains for the 4.0 liter engine .. and if you did buy an intake please dont take it to a mechanic to install it.. its 4 screws..
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Old 04-28-2009, 12:22 PM   #8
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I went to Banks website and can't find where they make that claim of increase in HP. Banks makes intake, header and cat-back systems and any claims of gain will most likely be based on installing all 3 systems as a whole. That way they can claim the "up to ?hp" increases but never guarantee them.
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Old 04-28-2009, 12:29 PM   #9
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Geez guys, I know it's not a mustang or vette. I was simply asking if there was a simple way to boost the power a little, not crank it up to run at Daytona. Thanks to those of you who provided useful information.
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Old 04-28-2009, 12:51 PM   #10
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Well, he's right, the product description at 4WD does say, "Up to 39% increase in HP." That's 74HP...right. Save your money dude, there's no way!
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Old 04-28-2009, 01:04 PM   #11
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more power?

On any vehicle if you increase airflow with a bolt on mod will increase power, it won't be much cause it's not a supercharger or turbo but it will be something. Intakes usually give you 2-4 more hp and an exhaust is about the same torque maybe a little more. A nice chip will help program the air fuel ratio to run at its optimal performance. I got the 2.4l and I thought about an intake, exhaust, chip and possibly rear gearing just so I am able to go up hills a little easier without having to downshift so much.
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Old 04-28-2009, 04:38 PM   #12
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chips also destroy motors.. then will run cooler or hotter and this takes life out of an engine
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Old 04-28-2009, 05:52 PM   #13
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more power?

You can't get real big gains from naturally aspirated vehicles unless you rebuild the
Engine and granny spending tons of money but if alls you want is a little bit those
Bolt ons will help a little. Headers are a good one as well that's where you will see the
Biggest difference.
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Old 04-28-2009, 08:00 PM   #14
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the 4.0 is a torque motor, not made for hp. you might be able to get 10-15hp with some bolt-ons but your not really going to feel it that much and its not worth the $$$. if you want more hp, and this is an honest answer, do what im going to do and put a chevy sb motor in it.
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Old 04-28-2009, 11:01 PM   #15
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Quote:
Originally Posted by johnnykane View Post
Geez guys, I know it's not a mustang or vette. I was simply asking if there was a simple way to boost the power a little, not crank it up to run at Daytona. Thanks to those of you who provided useful information.
Sorry brother...didn't mean to come off sounding like an a**. I was just funnin around and I knew what you really meant.
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Old 04-28-2009, 11:44 PM   #16
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'04 4.0L , manual , 3.73's

you still didnt mention what tire size you are running...

regardless though...

from what i have read, there wont be a huge/significant/noticeable difference in anything unless you do the;

intake
exhaust
chip

all at once.


maybe you try it out for yourself and post your findings
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Old 05-01-2009, 12:00 AM   #17
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here is the difference i noticed since winning a jet chip on ebay for half the price of one on the normal market.......i run 39s on a dana 44/9" combo and have had little or no breakage since we built it last august....on our april trip with the chip in i had a very noticeable increase in wheel speed(it was wet) and i broke 2 axles in less than 2 hours.....either coal creek(which i thought was a joke) is tougher than i thought or my motor was laying down more torque and horsepower than before......we were ona trip not 3 weeks before this one and i was without the chip and could lay into the throttle all while not making it but at the same time not breaking and then we change states and parts start exploding with the chip...i think it did add a little more power and it was just enough to cause some half ton breakage

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