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Old 08-04-2012, 11:23 PM   #1
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Jk engine upgrades?

Not going to use as an off road vehicle, but I would like to put some upgrades into the 3.8 liter. Any ideas? Nothing major, but I was thinking about putting a K@N filter in and mabee a Borla exhaust system. Remember this is a STREET jeep. Any other suggestions? Thanks!

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Old 08-04-2012, 11:31 PM   #2
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What do you want the upgrades to do? Cold air kits sound louder, yet show no effective performance increases. There are a few threads on these and the consensus seems to be to spend that money elsewhere.

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Old 08-05-2012, 12:02 AM   #3
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Don't know about the Jeep engines yet but I can tell you that a twin screw or TVS style roots supercharger works wonders in the low end torque department in the Modular Ford engines. Expensive but exhilarating!
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Old 08-05-2012, 06:42 AM   #4
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Not aware of too many things out there on the performance side related to heads, cams, cranks and things like that nature but there are items like exhaust, headers, re-programmers and, CAI's. If you want a big performance boost then super chargers are the way to go. Just keep in mind, more air equals more air out. So you will need to put an exhaust on the jeep if you go aftermarket induction systems in order to see any real perfomance gain from this mod.

Even when you do these mods the jeep isn't a racer, doesn't handle like it is on rails or anything so in the end, is the mod really worth the $$$ invested? Jeep performance mods are in lifts, gears, tires, suspensions (off road), not street related performance.
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Old 08-05-2012, 07:21 AM   #5
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I can not say enough good things about my Superchips
tuner. With 35's she still moves even with the A/C.
Can still hold 1500 Rpms without lugging the engine. I couldn't even do this last year running the stock 32's. The engine would lug and ping until I reached 2300.
I also have the Sprintbooster. Together they work really well together.
Ran a Banks CAI for a little while but that ended up back on CL where I bought it.

I feel bad for peeps driving 11's + and no available tuners.

FYI running 93 octane and around 14 mpg,
75% city.

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Old 08-05-2012, 03:30 PM   #6
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Why on earth did you buy a jeep?
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Old 08-05-2012, 03:36 PM   #7
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Good for like 50 HP lol
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Old 08-05-2012, 03:51 PM   #8
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Quote:
Originally Posted by Steve79
Good for like 50 HP lol
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Old 08-05-2012, 04:16 PM   #9
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Good for like 50 HP lol
only if you plasti dip it first in order to reduce the temperature of the air intake charge! noob....
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Old 08-05-2012, 04:20 PM   #10
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Quote:
Originally Posted by WranglerRiver View Post
Not going to use as an off road vehicle, but I would like to put some upgrades into the 3.8 liter. Any ideas? Nothing major, but I was thinking about putting a K@N filter in and mabee a Borla exhaust system. Remember this is a STREET jeep. Any other suggestions? Thanks!
someone dyno'ed a CAI and exhaust set up, and he seemed to gain about 11hp.

otherwise, realistically your options are limited to: bigger cam shafts with adjustable cam gears, bigger throttle body matched to the intake manifold, computer chip and headers, just like on any other NA engine...

otherwise there's always the tornado, high efficiency grounding kits, stickers and the always cool looking roof fin

EDIT: not a power adder, but your muffler bearings should always be oiled, not like this guy!!! biggest power robbers by far!
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Old 08-05-2012, 04:24 PM   #11
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Quote:
Originally Posted by bloodfart

only if you plasti dip it first in order to reduce the temperature of the air intake charge! noob....
Good idea
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Old 08-05-2012, 05:12 PM   #12
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I dont have a jeep but when i get it this week, i will be installing water cooled muffler bearings and liquid filled halogen bulbs..
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Old 08-05-2012, 05:20 PM   #13
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I dont have a jeep but when i get it this week, i will be installing water cooled muffler bearings and liquid filled halogen bulbs..
The water cooled bearings don't last too long. The intense heat burns off all the water in the system leaving the bearings to run hot. There is no warning for the driver. I contacted Chrysler regarding this and they did come up with a fix. For those of us with affected models Chrysler will notify you to take it to the dealer. They will plumb the exhaust bearing water into and out of the windshield washer reservoir. That way when your washer doesn't work you'll know your bearings are not being cooled. They are also working on a one time chime warning to alert the driver.
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Old 08-05-2012, 05:27 PM   #14
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Originally Posted by JPi4.0

The water cooled bearings do last too long. The intense heat burns off all the water in the system leaving the bearings to run hot. The is no warning for the driver. I contacted Chrysler regarding this and they did come up with a fix. For those of us with affected models Chrysler will notify you to take it to the dealer. They will plumb the exhaust bearing water into and out of the windshield washer reservoir. That way when your washer doesn't work you'll know your bearings are not being cooled. They are also working on a one time chime warning to alert the driver.
That's what i heard too, which is why i'm thinking of getting a 2013 rubi! Electronic muffler bearing disconnects and lockers ftw!
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Old 08-05-2012, 05:27 PM   #15
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Quote:
Originally Posted by JPi4.0

The water cooled bearings do last too long. The intense heat burns off all the water in the system leaving the bearings to run hot. There is no warning for the driver. I contacted Chrysler regarding this and they did come up with a fix. For those of us with affected models Chrysler will notify you to take it to the dealer. They will plumb the exhaust bearing water into and out of the windshield washer reservoir. That way when your washer doesn't work you'll know your bearings are not being cooled. They are also working on a one time chime warning to alert the driver.
Between this and DW, I am selling my jeep
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Old 08-05-2012, 05:30 PM   #16
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Quote:
Originally Posted by bloodfart

That's what i heard too, which is why i'm thinking of getting a 2013 rubi! Electronic muffler bearing disconnects and lockers ftw!
I laughed. Hard
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Old 08-05-2012, 05:35 PM   #17
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Man this turned into a lmao thread. It's great!!!!!
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Old 08-05-2012, 06:37 PM   #18
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are there any jeeps with NOOOOOOOOOOOOS?? i've been toying with the idea of spraying the exhaust manifold with NOS to lower exhaust gas temperatures and therefor reduce back pressure and boost power (gas expands when heated and gets trapped inside your muffler, cooling it contracts it so more exhaust gas can go out the same muffler! simple physics)

also, a vortex generator on the soundbar should greatly reduce drag when going topless, increasing the power felt. the OP should try these two options first and let us know
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Old 08-05-2012, 11:24 PM   #19
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Quote:
Originally Posted by kjeeper10 View Post
I can not say enough good things about my Superchips
tuner. With 35's she still moves even with the A/C.
Can still hold 1500 Rpms without lugging the engine. I couldn't even do this last year running the stock 32's. The engine would lug and ping until I reached 2300.
I also have the Sprintbooster. Together they work really well together.
Ran a Banks CAI for a little while but that ended up back on CL where I bought it.

I feel bad for peeps driving 11's + and no available tuners.

FYI running 93 octane and around 14 mpg,
75% city.

Ken
Ya I have heard many good things about chips! I deffinantly think that's the way to go. Thanks for the advice!
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Old 08-05-2012, 11:26 PM   #20
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Originally Posted by pluke the 2 View Post
Why on earth did you buy a jeep?
Because no other vehicle allows you to remove the doors and top. Besides that I really love the looks and design of them! Live in the city and don't have much interest for off-roaring.
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Old 08-06-2012, 06:32 PM   #21
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Not aware of too many things out there on the performance side related to heads, cams, cranks and things like that nature but there are items like exhaust, headers, re-programmers and, CAI's. If you want a big performance boost then super chargers are the way to go. Just keep in mind, more air equals more air out. So you will need to put an exhaust on the jeep if you go aftermarket induction systems in order to see any real perfomance gain from this mod.

Even when you do these mods the jeep isn't a racer, doesn't handle like it is on rails or anything so in the end, is the mod really worth the $$$ invested? Jeep performance mods are in lifts, gears, tires, suspensions (off road), not street related performance.
Here is a good watch..



Questions welcome!!!

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Old 07-21-2013, 06:51 PM   #22
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Doesn't an o-pipe, sorta like an x-pipe, increase hp and trq around 50+? And blinker fluid uses less electricity which in turn provides more spark for a better combustion which adds another 10 or so hp.

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