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Old 01-09-2011, 10:12 AM   #1
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Extra guts in 5th gear?

I have the 2.4l 4 cyl in my 04 TJ.This summer a few buddies of mine are planning to take a road trip to north carolina i can drive the highways in fourth gear at 71 mph at 3400 rpm only trouble is when i go to 5th i lose 6 or 7 mph, and you can't drive 700+ miles at 3400 rpm. I was wondering if anyone had some tips on giving the 2.4l a little extra in 5th so i can use it and don't blow up my motor halfway down there. I'm curently running the 4.10 gear set up, i wanna keep any mods cheap under 250$ preferably. Please keep the flaming of the 4 cyl to a minimum i know it's not made for highway driving other than this trip it will not see the highway.

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Old 01-09-2011, 10:18 AM   #2
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haha you have an I4! looooserrrr


anyways try some different gearing that will probably solve the problem.

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Old 01-09-2011, 10:19 AM   #3
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4.56 or 4.88?
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Old 01-09-2011, 10:26 AM   #4
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haha you have an I4! looooserrrr


anyways try some different gearing that will probably solve the problem.
Wow dude...That was harsh
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Old 01-09-2011, 10:37 AM   #5
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My 04 2.4L can run 70 easily in 5th except on hills or if there are more than 3 people in it. Also, keep the AC off if you have it.
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Old 01-09-2011, 10:39 AM   #6
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My 04 2.4L can run 70 easily in 5th except on hills or if there are more than 3 people in it. Also, keep the AC off if you have it.
Well are you running 31s?... and the backseat will be coming out of it for more cargo room as well as only one passenger will be there and hills is exactly my problem and windy days
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Old 01-09-2011, 11:09 AM   #7
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haha you have an I4! looooserrrr.
And you need to go look in a mirror dude, that kind of crap doesn't fly here... or anywhere. Grow up.

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Originally Posted by magicman37 View Post
I have the 2.4l 4 cyl in my 04 TJ.This summer a few buddies of mine are planning to take a road trip to north carolina i can drive the highways in fourth gear at 71 mph at 3400 rpm only trouble is when i go to 5th i lose 6 or 7 mph, and you can't drive 700+ miles at 3400 rpm. I was wondering if anyone had some tips on giving the 2.4l a little extra in 5th so i can use it and don't blow up my motor halfway down there. I'm curently running the 4.10 gear set up, i wanna keep any mods cheap under 250$ preferably. Please keep the flaming of the 4 cyl to a minimum i know it's not made for highway driving other than this trip it will not see the highway.
What size tires are you running.

But regardless of what size tires you are running, which I ask for axle ring & pinion ratio reasons, you are not going to find any mods under $250 that will help in the least. Not a throttle body spacer, not a cold air intake, not a K&N air filter, not a computer chip. None of those will help your issue. Really. Sorry. Depending on your tire size, there is possibly a new axle gear ratio that will help the issue but that's going to be more like $1000-1100 to do.
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Old 01-09-2011, 11:10 AM   #8
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Well are you running 31s?... and the backseat will be coming out of it for more cargo room as well as only one passenger will be there and hills is exactly my problem and windy days
No I am not. I am running 30's and there is not anything you can do to improve performance on any TJ's so please don't waste your money on those so called performance chips and other things.

My daily commute is 100 miles and almost all interstate and you will find me in the right lane taking in the sights. I stopped rushing to get anywhere since I started driving jeeps 10 years ago.
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Old 01-09-2011, 11:19 AM   #9
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Well that reply just made you sound dumb of course there are headers cold air intakes performance exhausts retarding the timing slightly for more power tons of things i was just thinking maybe someone would say something like run the premium fuel instead or buy an intercooler. Little tricks that maybe i havent thought of, guess you guys are just bound and determined for me to not see 75 mph in 5th... and i'm running 31x10.5 i left that bit out sorry
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Old 01-09-2011, 11:22 AM   #10
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Well, I guess you know what works and don't need any of our advice afterall. We are apparently all simply monkeys dancing on our keyboards.
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Old 01-09-2011, 11:24 AM   #11
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Well, I guess you know what works and don't need any of our advice afterall. We are apparently all simply monkeys dancing on our keyboards.
nah man wasnt directed at you it was directed at the guy that said there was absolutely nothing i could do at all to increase my performance and not to waste my time
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Old 01-09-2011, 11:26 AM   #12
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nah man wasnt directed at you it was directed at the guy that said there was absolutely nothing i could do at all to increase my performance and not to waste my time
Aside from regearing your axles or installing a supercharger which is not the right way to overcome performance lost to installing big diameter tires, he was absolutely correct. No kidding. The only way to improve performance that was lost from having installed bigger diameter tires is to regear the axles.

If you're still running the stock diameter tires, the ONLY thing you can do is to install a supercharger. That other stuff... headers, throttle body spacers, air intakes, etc. won't help in the least. Really. Well I guess buying that kind of crap helps improve our economy.
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Old 01-09-2011, 11:34 AM   #13
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Aside from regearing your axles or installing a supercharger which is not the right way to overcome performance lost to installing big diameter tires, he was absolutely correct. No kidding. The only way to improve performance that is lost from installing big diameter tires is to regear the axles.
I dont want sustained performance gains you guys are missing the point im just taking one road trip and i was wondering what i could do to make it so that this one time i would go on the highway and get the extra 5 or 6 mph to keep up with traffic im looking for answers like "use a lighter weight oil" "clean off the spark plugs" or "use these top of the line plugs" "or leave the top up to cut wind resistance" Thank you for your help i promise im not offended at all by the fact that you guys thought I wouldnt know that bigger tires need regearing.
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Old 01-09-2011, 11:39 AM   #14
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Have you tried kick pedaling? Just fyi- I normally do this without doors on.
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Old 01-09-2011, 11:40 AM   #15
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The only way to improve performance that was lost from having installed bigger diameter tires is to regear the axles.
Exactly....
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Old 01-09-2011, 11:41 AM   #16
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Have you tried kick pedaling? Just fyi- I normally do this without doors on.
What is it?
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Old 01-09-2011, 11:43 AM   #17
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We are not such simpletons as to not know what you are after. What we are trying to get across to you is that the cheap upgrades you see hyped in the catalogs like cold-air intakes, headers (your Jeep already has headers), cat back exhaust, low-restriction catalytic converter, chips, super-duper spark plugs, ionic magnetic fuel ionizers, K&N air filters, etc. are just snake-oil devices with one purpose in mind... to extract as much $$$ from the pockets of the young naive Jeepers who don't have the experience yet to understand what is hype and what is not hype. That type of "stuff" is, in reality, hype... snake oil in other words.



And if we sound harsh, we aren't trying to be. We are simply trying to save your hard-earned $$$ for you and give you solid and very real advice. If any of those things actually worked, we'd all be all over pointing out which ones do.
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Old 01-09-2011, 12:11 PM   #18
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We are not such simpletons as to not know what you are after. What we are trying to get across to you is that the cheap upgrades you see hyped in the catalogs like cold-air intakes, headers (your Jeep already has headers), cat back exhaust, low-restriction catalytic converter, chips, super-duper spark plugs, ionic magnetic fuel ionizers, K&N air filters, etc. are just snake-oil devices with one purpose in mind... to extract as much $$$ from the pockets of the young naive Jeepers who don't have the experience yet to understand what is hype and what is not hype. That type of "stuff" is, in reality, hype... snake oil in other words.



And if we sound harsh, we aren't trying to be. We are simply trying to save your hard-earned $$$ for you and give you solid and very real advice. If any of those things actually worked, we'd all be all over pointing out which ones do.
Well thanks i guess i still think your missing the point as im not in the market for performance exhaust or new filters or any products like that i just wanna know how premium vs regular will affect my performance, or the type of oil i use, or maybe wind resistance or other things but i will give up on here because aside from kick pedaling which i dont even know what that is how sad is that i havent recieved any real answers on how to get the most out of my motor without putting new air filters and headers and exhausts and without spending a rediculous amount of money (regearing) and sorry if i sounded hostile too, its just frustrating when people tell you things you know
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Old 01-09-2011, 12:17 PM   #19
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Premium gasoline gives no more power when compared to regular, its higher octane only helps prevent fuel from igniting prematurely from excessive compression in a high compression engine. 91 octane fuel contains the same energy content that 87 octane does. Going to some magic kind of oil isn't going to help either.

We are just trying to tell you... again... that there is nothing easy or cheap that is going to give or restore your lost 6-7 mph. Not premium fuel, not synthetic oil, not aerodynamic mirrors. I am done here.
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Old 01-09-2011, 02:06 PM   #20
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put the stock tires back on or regear.
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Old 01-09-2011, 03:09 PM   #21
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Well thanks i guess i still think your missing the point as im not in the market for performance exhaust or new filters or any products like that i just wanna know how premium vs regular will affect my performance, or the type of oil i use, or maybe wind resistance or other things but i will give up on here because aside from kick pedaling which i dont even know what that is how sad is that i havent recieved any real answers on how to get the most out of my motor without putting new air filters and headers and exhausts and without spending a rediculous amount of money (regearing) and sorry if i sounded hostile too, its just frustrating when people tell you things you know
No, you've received quite a few real answers...just not the ones you want to hear. There are no magic pills...you'll either have to spend big money or be stuck with what you've got.
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Old 01-09-2011, 06:14 PM   #22
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2:06 pm today. Jason Wrangler hit it on the head. $250 or less. Put car tires on it. 235/75/15. Street tires all the way around. I wouldnt even have the 30" tires it came with. Even look for 205/78/15 ..... That would be your best and cheapest bet to make that puppy hang in there in high gear. Of course it will look like a mail truck, but for your road trip it will do the trick.

Please: Be nice to the folks on the forum that are trying to help - -
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Old 01-09-2011, 08:12 PM   #23
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agreed lost my compsure a little oh well i think i will regear when i have the funds just for the trip ill settle for a good tune up and the slow lane

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