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Old 07-16-2014, 05:06 PM   #1
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More Power?

I am the proud owner of a brand new '14 JKU. It came from the dealer with a 4 inch lift and 33" tires ...I Love It ... I was just wondering what some engine mods are that you guys have done. I also own an older corvette and spend a lot of time on the corvette forum discussing such things as my corvette is Heavily modified So here we go with the Jeep!!What are some good engine mods ? Looking for anything from bang for the buck to maybe even power adders such as blower ,turbo, ect..Thanks

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Old 07-16-2014, 05:18 PM   #2
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Don't even bother asking what anybody thinks. I did the same thing when I got my 2013 JKU Rubicon and threw all sorts of upgrades on it. To me it made a difference in the performance but some guys on here will tell you, "you're driving the wrong vehicle to expect performance." Do what you want with your rig and share the shit out of it cause you can only please some of the people on here 😋

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Old 07-16-2014, 05:21 PM   #3
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Having just traded in my 13 mustang GT for the 14JKU it feels.....sluggish. I don't think anything short of a supercharger will satisfy me, but it is not exactly built for speed either.....however I have seen some surprisingly quick 4x4 trucks at the drag strip though.
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Old 07-16-2014, 05:29 PM   #4
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Best thing to do to get better acceleration with a Jeep is to change the gears in the axles. It runs you $1,500-2,000 depending on where you do it. Add in more money if you put in locking differentials at the same time. But that's the best bang-for-the-buck you can get for seat-of-the-pants improvement, especially if you're running factory 3.21 gears.

A tuner may add a few HP, as does intake and exhaust. But you'll barely notice the difference driving down the street.

Beyond that, forced induction or an engine swap is the only other option to get a lot more power.
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Old 07-16-2014, 05:38 PM   #5
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to the Forum..

Congrat's on your new ride!

Totally different animal, verses a Corvette. I have owned several of both.
Your best investment, to get better performance out of your JKU, is to re-gear it, to a 4.56! This is assuming, that you still have the stock gearing in yours.

I wouldn't waste my money on air intakes, or exhaust MODS, for the minor power gain, if any that you will receive. But they will give you that noise placebo affect.

There is also a vendor on this Forum, RIPP, that will sell you a Supercharger kit. Yes, that will give you more power, but at a high cost, and then what about your factory engine warranty, how will it be effected!!!

Good Luck on your choices.......
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Old 07-16-2014, 06:26 PM   #6
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Best thing to do to get better acceleration with a Jeep is to change the gears in the axles. It runs you $1,500-2,000 depending on where you do it. Add in more money if you put in locking differentials at the same time. But that's the best bang-for-the-buck you can get for seat-of-the-pants improvement, especially if you're running factory 3.21 gears.

A tuner may add a few HP, as does intake and exhaust. But you'll barely notice the difference driving down the street.

Beyond that, forced induction or an engine swap is the only other option to get a lot more power.
Yep, yep and yep. Makes a big difference. Don't get me wrong- love a good supercharger and have one on another vehicle. But I'd leave it alone on a Jeep. Not the greatest reviews on the current options, you still can't customize shift points (just pre-programmed tunes) and I'd leave engine components alone for warranty purposes. Too many Pentastar issues.
Gears will give you back some of the lost oomph stolen away by the MPG monster.
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Old 07-16-2014, 07:18 PM   #7
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Thanks, What you guys are saying is kinda what I was thinking. Im one of those guys who "just cant leave it alone" so I guess I'll start with suspension and probably a winch also lighting ect. ect. I do plan on uusing it out in the woods on some off road trails (I like to hunt) but nothing to crazy. thanks again for the info. Hope to be hangin around here a lot in the future ...Here a pic...Like the bumpers and wheels? all done by dealer seems to be good stuff all covered by warranty ... they say??
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Old 07-16-2014, 07:34 PM   #8
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Old 07-16-2014, 08:59 PM   #9
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Congrats on the Jeep. Like others have said. Gears is the best bang for the buck on a Jeep. I have seen people easily spend 2 grand on engine mods and get no where near what you get with gears.
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Old 07-16-2014, 10:21 PM   #10
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Like with most anything that makes it way to SEMA the Jeep has a enormous aftermarket offering. I looked at the options for power upgrades to get more torque out of my 3.8L and here is what I came up with. (Some of this will differ with the 3.6L obviously)

Gearing and truss setup (The generally accepted option for getting it moving)

Headers, Y Pipe, and Exhaust with Firepower distributor and plug wires, Sprint module and Tuner (Bolt on options for some power)

HESCO stroker kit (A good option if you have the time, resources and knowledge to install)

MOTEC LS Conversion (Good V8 option because of the stand alone system)

Hemi conversion (Plenty of resources and companies that make the kits for this)

Cummins 4BT (Requires a 4 inch lift and gears around 3.21, heaviest engine swap but great torque and mileage)

Like it was stated though everyone has an opinion, but overall it is your Jeep. You make the call on what you are willing to do and run with it. No one will ever knock you for originality.
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Old 07-16-2014, 11:03 PM   #11
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Originally Posted by NixRig View Post
Thanks, What you guys are saying is kinda what I was thinking. Im one of those guys who "just cant leave it alone" so I guess I'll start with suspension and probably a winch also lighting ect. ect. I do plan on uusing it out in the woods on some off road trails (I like to hunt) but nothing to crazy. thanks again for the info. Hope to be hangin around here a lot in the future ...Here a pic...Like the bumpers and wheels? all done by dealer seems to be good stuff all covered by warranty ... they say??
Side question, do you know what bumper that is? That is exactly what I have been looking for.

And what gears do you currently have
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Old 07-16-2014, 11:23 PM   #12
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Nice looking jeep! Did you say a 4 inch lift with 33s? Lol
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Old 07-17-2014, 02:19 AM   #13
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Originally Posted by NixRig View Post
Thanks, What you guys are saying is kinda what I was thinking. Im one of those guys who "just cant leave it alone" so I guess I'll start with suspension and probably a winch also lighting ect. ect. I do plan on uusing it out in the woods on some off road trails (I like to hunt) but nothing to crazy. thanks again for the info. Hope to be hangin around here a lot in the future ...Here a pic...Like the bumpers and wheels? all done by dealer seems to be good stuff all covered by warranty ... they say??
If you want better performance reduce drag and weight as in remove the big lift and tires. You don't 4" lift for 33" tires and a 4" lift generates considerable more drag than a 2-2.5" lift.

Check out some of the threads on the usual affordable performance mods. They certainly do create the illusion of improved performance: reduce throttle lag, faster shifting and lots and lots of noise. Superchargers, turbos and engine swaps are your best choice, although the first two are useless at the low end where Jeeps spend most of their time.

Otherwise, enjoy your hopped up Corvette when up have a Need for Speed and drive your Jeep when you just want have fun regardless of speed.
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Old 07-17-2014, 05:34 AM   #14
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Old 07-17-2014, 09:18 AM   #15
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If you have a 4 inch lift, I would regear and go with some 37s. A jeep will be slow no matter what you do to it lol. If you have an auto I've heard that the superchips flashpaq will change the shift points and make it better.
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Old 07-17-2014, 12:01 PM   #16
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If you have a 4 inch lift, I would regear and go with some 37s. A jeep will be slow no matter what you do to it lol. If you have an auto I've heard that the superchips flashpaq will change the shift points and make it better.
Driving my new 3.6 with the 3.21 gears I have come to the conclusion that a lot of the sluggishness could be avoided if the transmission shift points were tuned better. I am actually considering a tuner now mainly because of the transmission tuning and if I can enlarge the preferred power area even a little that would be a nice bonus. Just for clarification I know that tuning is no replacement for gears but I think it can help.
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Old 07-17-2014, 05:30 PM   #17
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Driving my new 3.6 with the 3.21 gears I have come to the conclusion that a lot of the sluggishness could be avoided if the transmission shift points were tuned better. I am actually considering a tuner now mainly because of the transmission tuning and if I can enlarge the preferred power area even a little that would be a nice bonus. Just for clarification I know that tuning is no replacement for gears but I think it can help.
I'd recommend you to go for axle re-gear, I think you will get more improvements from that, hands down..... Of course you will need a re-programmer like the FlasCal (cheaper than the flaspak) to adjust the PCM, it will adjust the speedo and shift points when you tell it the correct tire size and axle ratio. I have the FlashCal and when I changed to 315/70R17, did the program change and I did notice the difference in the shift points and acceleration/power from stock 255/75R17.

Em...
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Old 07-17-2014, 10:01 PM   #18
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Bumpers are both rugged ridge they have a textured finish and the front has a winch mount . the wheels are 17" pro-comps with 285-70-17 bf Goodrich. trying to figure out what to do with the exterior maybe lights. but that would be another thread...
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Old 07-18-2014, 12:19 AM   #19
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Welcome. Have fun with it and put some miles on it first. Then when you decide what your really wanting it to do you will also have a better idea of what will work for you. I am a fellow speed freak and Have had mine to 100 a couple of times in the desert. Enjoy it a bunch.
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Old 07-18-2014, 10:47 AM   #20
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Thanks, What you guys are saying is kinda what I was thinking. Im one of those guys who "just cant leave it alone" so I guess I'll start with suspension and probably a winch also lighting ect. ect. I do plan on uusing it out in the woods on some off road trails (I like to hunt) but nothing to crazy. thanks again for the info. Hope to be hangin around here a lot in the future ...Here a pic...Like the bumpers and wheels? all done by dealer seems to be good stuff all covered by warranty ... they say??
The "problem" is there's just not much room for improvement on the 3.6 without major investment or forced induction. What year's your Vette? I've got a '66 327 (that's driving me insane at the moment) and I know there's a ton of power to be made if I wanted to put $500-800 into mods. Nothing comparable with the Jeep, though.

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