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Old 05-06-2008, 08:13 PM   #1
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Calling all 2.4L TJ's

My 04 Electric Lime Green Pearl TJ has one of those (YES) red headed step child 2.4L's in it. I've come to enjoy mine though. Just want to see what some of you have done with lift and bigger tires and gears. I cant get gears for mine yet but i should be able to swing for some 31's to go with the 4.11's i have now. Right now im above 20+ mpg with the 28" P225/75/15 Wrangler GS/A's, and might be around 18'ish with the 31's. I would'nt want my little 4 popper to be a little to

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Old 05-07-2008, 07:45 AM   #2
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I have 31s on mine and only get 16-18 mpg.... im stock other wise and i was thinking of going with a 1" BL and 32s, 33s if they fit but im sure the milage will tank even more when I do that...

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Old 05-07-2008, 09:44 AM   #3
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Im getting about 10-12 mpg with my 4" lift and 33" BFG A/T... I'd honestly be getting better gas mileage with a 4.0. I wont complain to much cause this 4banger has done more than I thought it could ever do. But I still plan on swaping a 4.0 for the extra power and better gas mileage.
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Old 05-07-2008, 09:58 AM   #4
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Pretty much anything bigger than 31's you might want to regear so your not having to press the gas peddle to the floor to go 60 on the highway. If your like me, hope for the wind to blow the same way your going so you can use it like a sail. Ive gone 67 once... Thanks to the wind though.
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Old 05-07-2008, 02:30 PM   #5
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Awesome!!! I Got 2.4 Woot Woot!!!
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Old 05-07-2008, 08:22 PM   #6
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I have a 2.4 with the 6 speed, and while I can't really accelerate going up hills at highway speeds it will move right along especially with a downshift. I'm interested in the 31 question too. I have a set of Bridgestone Dueler AT REVO 31-10.5-15 in my basement waiting for my stocks to wear out.
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Old 05-09-2008, 11:12 PM   #7
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Yeah thanx for the replies fellas, im still running the same Wrangler GS/A's which are 28" tall, which do give me just a little bit of trouble on some grades with 4.11's. I want to go with atleast 31's but i wont regear untill the jeeps free and clear from the bank (3yrs) but untill then ill have to suffer with the lack of power.
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Old 07-27-2011, 12:30 PM   #8
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not to hijack the thread here...but I'm installing a RC 4" SL this weekend, and throwing on 33x12.50 Maxxis Bighorns. The Jeep's stock right now. Keeping the gears at 3.73 as well. I'm hoping the 2.4L will be fine until I can scrape some money together to regear. It's manual, so I think I should be ok for the time being. I'll def post pics once the lift is on, and I'll let you all know how she runs!
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Old 07-27-2011, 02:04 PM   #9
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not to hijack the thread here...but I'm installing a RC 4" SL this weekend, and throwing on 33x12.50 Maxxis Bighorns. The Jeep's stock right now. Keeping the gears at 3.73 as well. I'm hoping the 2.4L will be fine until I can scrape some money together to regear. It's manual, so I think I should be ok for the time being. I'll def post pics once the lift is on, and I'll let you all know how she runs!
wow, i don't think you can hijack a 2 year old thread. good luck with your lift.
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Old 07-27-2011, 10:13 PM   #10
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I've got a 97 with Bridgestone 31x105 stock otherwise, 5 speed. Normally I get 15 or less. On this trip from Houston to Taos I got over 20, oh....I was towing it with my SUV which got 10 but I figure 2 for one. jj
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Old 07-27-2011, 10:21 PM   #11
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damn never saw this thread, how are you guys gettin horrible mpg on 31s? i have a 2.5" lift and 31s on my 2.4L 6 speed and get 18mpg just about everytime and im hardly on the skinny pedal, if i take it easy i can get 20-23
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Old 07-27-2011, 10:24 PM   #12
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2006 6spd, 3.25" lift with 31" MT's. About 20-21mpg
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Old 07-27-2011, 10:33 PM   #13
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2006 6spd, 3.25" lift with 31" MT's. About 20-21mpg
exactly lol and i dont think power is horrible at all with the 3.73s, yea i gotta downshift on the insterstate but i had to in my 5spd cavalier too, and idk how the person who posted in the first couple of posts had 4.10s, i thought only the 2.5L had 4.10s..unless you could special order them?
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Old 07-27-2011, 10:45 PM   #14
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oh forgot I got 3:73 also and drives great. On hills I downshift but no biggie.
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Old 07-27-2011, 11:43 PM   #15
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3.73s, 2.5" lift, 33x12.50x15 duratracs, getting 21mpg per fill up.
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Old 07-27-2011, 11:47 PM   #16
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with 33s? damn thats good
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Old 07-28-2011, 06:08 AM   #17
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For the record:

03 and 04's with the 5 speed and the 2.4 only came with 4:11's or 4:56's. 4:56's were an OPTION on these years with 4:11's being standard. The 6 speed came about in 05 and 06 where they came with 3:73's standard.

The 2.4 4 cylinder was put in the wranglers from 03 to 06 and should not be confused with the 2.5 4 cylinder. They are COMPLETELY different engines.

My 04 2.4 5 speed with 4:11's on 31's with a 2" lift and 1" body lift gets 16 mpg. No better no worse on the highway. =/

The difference in the transmission from 03 to 06 and the gear ratios are what will make the difference on the MPG's! The 05 and 06 with the 6 speeds are much better on fuel economy and have better highway manners.
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Old 07-28-2011, 06:36 AM   #18
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with 33s? damn thats good
That's on the weeks I hop onto the thru-way into baltimore, 65 the whole way, and hop on it back home, no side trips. Usually, it's 18 or so.
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Old 07-28-2011, 09:43 AM   #19
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I am on my second set of Dick Cepek Mud Country 31x10.5x15 I got just under 28,000 miles out of them and they worked awesome off road especially if you let a little air out. I also have a Daystar 1.75 Coil Spacer lift and aftermarket steel wheels with 3.75 backspacing so they don't rub the control arms. I get 18mpg in town and or highway.... doesn't matter. Oh and mine is a 97 SE 5spd.
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Old 07-29-2011, 02:54 PM   #20
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4" lift 1.25" BL with 35's and a 2.4L 5speed, I am getting about 15mpg with 4.11's, and I have added a ton of weight.
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Old 07-29-2011, 05:15 PM   #21
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4" lift 1.25" BL with 35's and a 2.4L 5speed, I am getting about 15mpg with 4.11's, and I have added a ton of weight.
hows your power with 4.11s and 33s..i have the 6 speed but i when i go to 33s i was thinkin 4.56 hmm
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Old 07-29-2011, 11:03 PM   #22
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Power isnt terrible, but its deffinitely not the best. I have a lot of trouble if I have to drive hills and what not. I am going to 4.88's next month.
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Old 07-29-2011, 11:26 PM   #23
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4.88 sounds right for you with the 5 speed, with my 6 speed ill prob do 4.56
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Old 08-10-2013, 06:23 PM   #24
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mine has 31X10.50 i can make 19 mpg
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Old 08-10-2013, 07:30 PM   #25
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Mine is an 06 I swapped the 6speed for the 5 speed from an 04 So I'm running a 5 speed with 3.73 gears. I'm getting around 18-20 if I drive like an old lady Also running a cat back exhaust and soon to be finishing up a thru the cowl snorkel
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Old 01-05-2014, 04:40 AM   #26
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2.4tj

I have a 2.4L with a 2.5" lift I made from mild steel with 33' bfg km2's. I cut a hole in the intake on the side (cut snorkel off) and used a 6" dryer hose to suck air from adhered right behind the from bumper with a water trap of sorts (passed in front of radiator fan) and the thing has to be getting near 24 mpg.. Its 2005 with 6speed and 4.11 gears I also live at sea level so that might help and I've ported my throttle body with a rotary grinder and buffer tool to remove hose to metal lip and material on inner throttle body and intake manifold (which is plastic) surprisingly helped a noticeable amount with throttle response (but do with caution as your jeep won't like small metal/plastic shards ie: remove the part first and use a compressor and wash). But it runs lean I think with that gearing so I tend to get a good amount of buildup so a little seafoam once a year helps with sluggish performance.. I'm kind of fanatical so that's just me, maybe when you drive a manual you feel the vehicle more because of the extra input within the system. Btw does anyone ride the clutch a little bit or just a real quick motion to engage/disengage? I think I might be wearing on my clutch from riding it (holding it in longer than need be or using it as a break of sorts occasionally) also my damn steering is annoying.. I think I've killed another steering stabilizer as it will slightly coast in the lane with a very slight slack in steering.
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Old 01-05-2014, 01:16 PM   #27
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I have a 2.4 with the 6 speed, and while I can't really accelerate going up hills at highway speeds it will move right along especially with a downshift. I'm interested in the 31 question too. I have a set of Bridgestone Dueler AT REVO 31-10.5-15 in my basement waiting for my stocks to wear out.
Did you ever see a post from like 6 years ago and say, whoa! Me too! And realize it was you that wrote it. Lol. Thanks for the memories

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