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Old 05-04-2011, 04:02 PM   #1
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more power?

hey im new here with a new 2003 jeep wrangler sahara five speed. I have read here that cai is worthless on jeeps so what isnt worthless to do? it already has a catback exhuast on it so what should i do next to get some more power? thanks.

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Old 05-04-2011, 04:05 PM   #2
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what size tires do you have? and what gears? what engine? from what ive read on here there isnt really much you can do to add a significant amount of power, best thing to do is regear if your lacking power due to a lift and tires

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Old 05-04-2011, 04:15 PM   #3
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There's plenty of performance upgrades to get a significant amount of power out of that 4.0. Start with the best spark plugs, synthetic oil, cold air intake, throttle body spacer, there's power programmers that tune in your air fuel ratio for better gas mileage an improved horse power. It's mainly all about how serious you want to go an how much your willing to pay...safe wheelin man
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Old 05-04-2011, 04:45 PM   #4
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Originally Posted by StrangerWrangler
There's plenty of performance upgrades to get a significant amount of power out of that 4.0. Start with the best spark plugs, synthetic oil, cold air intake, throttle body spacer, there's power programmers that tune in your air fuel ratio for better gas mileage an improved horse power. It's mainly all about how serious you want to go an how much your willing to pay...safe wheelin man


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Old 05-04-2011, 04:58 PM   #5
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Originally Posted by StrangerWrangler View Post
There's plenty of performance upgrades to get a significant amount of power out of that 4.0. Start with the best spark plugs, synthetic oil, cold air intake, throttle body spacer, there's power programmers that tune in your air fuel ratio for better gas mileage an improved horse power. It's mainly all about how serious you want to go an how much your willing to pay...safe wheelin man
ya you COULD dump all your money into those mods for a 10hp gain total, which i would not consider a "significant" gain, waste of money, regear and get some real power.
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Old 05-04-2011, 05:11 PM   #6
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Personally I wouldn't dump money either but if your daily driver is also your wheeler your gonna be at 3grand goin 60 down the high burning your gas that 4.00$ a gal. Honestly dude if you want horse you gotta rip the block apart an rebuild it you can get almost a 4.2 liter with a domed head
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Old 05-04-2011, 05:14 PM   #7
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i run 33"s on a 4.0L 5spd with 4.11 gears and im at just around 2000 rpms at 60mph, 16-18mpg depending on what im doing, works great for DDind and i go wheeling almost every weekend and it works just fine there too, i do wish i had 4.56 gears but it isnt a big enough gain to make me want to regear 1 size up
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Old 05-04-2011, 05:20 PM   #8
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Personally I wouldn't dump money either but if your daily driver is also your wheeler your gonna be at 3grand goin 60 down the high burning your gas that 4.00$ a gal. Honestly dude if you want horse you gotta rip the block apart an rebuild it you can get almost a 4.2 liter with a domed head
If you are hitting 3 grand at 60 mph, you are either geared wrong or your tires are too small. MOST people that come on the site looking for more power have put on larger tires and not realized that its killin their power. The ONLY way to get this back is by regearing correctly. If your gears are done right, taking in consideration your motor, tranny, and tire size, the RPMS you hit are going to be very close to the stock powerband.

Save the money on chips, cold air intakes, throttle body spacers...it wont get you anything.
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Old 05-04-2011, 07:57 PM   #9
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