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Old 07-24-2010, 05:38 AM   #1
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Talking Jet Performance Chip/K&N

Good day all,has anyone tried the Jet performance chip or any of the other brands?It attaches to your OBD connector and reprograms your computer supposedly giving you more power.Results good, bad, or ugly?Also just yesterday ordered the K&N cold air intake best price I found from an e-bay retailer $224 no shipping, brand new in the box I'll let y'all know the results when I get it and install it.Like the one I had on my little Miata.

LATER,


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Old 07-24-2010, 05:44 AM   #2
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Save you money for anything else. As you will see soon everyone will tell you they do not work. Cold Air Intakes are bad for your TJ. They allow excess dirt to get into your engine.

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Old 07-24-2010, 07:40 AM   #3
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Results of a new chip are good for the company selling them to you. Not so much for you.

As previous poster said, save your money, Jeep engines havent changed much in quite a while, theres not much you can do to make it more powerful.
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Old 07-24-2010, 07:41 AM   #4
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Here we go again......
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Old 07-24-2010, 08:54 AM   #5
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Old 07-24-2010, 08:55 AM   #6
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Not to be rude but I guess the search feature is down.
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Old 07-24-2010, 09:02 AM   #7
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Installing a K&N air filter is one of the worst things you can do to your engine, really. As mentioned above, some highly reliable lab tests of a number of air filter types showed that the K&N lets far more dirt in than any of the others. I removed my K&N after discovering the same thing for myself before that test was conducted.

The Jet chip is a waste of $$$ too, it only does anything when the engine is at extremely high rpms and at wide-open throttle. Offroading or around town, you won't notice a thing with it. By federal law, they are only allowed to change anything when the engine is at extremely high rpms and wide-open throttle which is only useful for when your Jeep is running the quarter-mile at the dragstrip.

Edit: The following is from one section of that ISO test of air filters:



In the chart above it’s important to note the different test durations for each filter. The AC Delco filter test ran for 60 minutes before exceeding the restriction limit while the AMSOIL and K&N tests each ran for 20 and 24 minutes respectively before reaching max restriction. In 60 minutes the AC Filter accumulated 574gms of dirt and passed only 0.4gms. After only 24 minutes the K&N had accumulated 221gms of dirt but passed 7.0gms. Compared to the AC, the K&N “plugged up” nearly 3 times faster, passed 18 times more dirt and captured 37% less dirt. (end of quote)
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Old 07-25-2010, 05:25 AM   #8
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Ok how about just a search only Wrangler forum if folks are going to get upset every time a question is asked or may be just don't look at a post
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Old 07-25-2010, 06:55 AM   #9
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Ditto the oil type filter "no-no" (especially if your engine is turbo or supercharged). If you want more air flow, install a larger paper filter element (cylinder type). If you want cold air, install duct work to the air filter from outside (OEM already does this). Most exposed aftermarket filter housings pull more engine compartment air (hot) than outside ambient air.
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Old 07-25-2010, 07:32 AM   #10
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Thanks for the chart, interesting and surprising results! Too bad they didn't test Fram filters, that would have been interesting, I've seen Fram oil filters compared to others and they are big time crap.
I'm disappointed Wiks didn't do better, according to my research Wiks oil filters ( same as NAPA Gold) kick ass.
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Old 07-25-2010, 07:53 AM   #11
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^ The chart is for air filters not oil filters
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Old 07-25-2010, 07:58 AM   #12
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Filter Question

Quote:
Originally Posted by Jerry Bransford View Post
Installing a K&N air filter is one of the worst things you can do to your engine, really. As mentioned above, some highly reliable lab tests of a number of air filter types showed that the K&N lets far more dirt in than any of the others. I removed my K&N after discovering the same thing for myself before that test was conducted.

The Jet chip is a waste of $$$ too, it only does anything when the engine is at extremely high rpms and at wide-open throttle. Offroading or around town, you won't notice a thing with it. By federal law, they are only allowed to change anything when the engine is at extremely high rpms and wide-open throttle which is only useful for when your Jeep is running the quarter-mile at the dragstrip.

Edit: The following is from one section of that ISO test of air filters:



In the chart above it’s important to note the different test durations for each filter. The AC Delco filter test ran for 60 minutes before exceeding the restriction limit while the AMSOIL and K&N tests each ran for 20 and 24 minutes respectively before reaching max restriction. In 60 minutes the AC Filter accumulated 574gms of dirt and passed only 0.4gms. After only 24 minutes the K&N had accumulated 221gms of dirt but passed 7.0gms. Compared to the AC, the K&N “plugged up” nearly 3 times faster, passed 18 times more dirt and captured 37% less dirt. (end of quote)
What do you think about the K&N drop in filters?
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Old 07-25-2010, 08:08 AM   #13
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What do you think about the K&N drop in filters?
All K&N air filters use the same filter material so a K&N drop-in filter would be no different filtration-wise. My replacement Rubicon CAME with a frigging K&N air filter and I'm dumping it as soon as I can get to it and before I finally get it wheeling out in the desert. It needs so much work done to it that I haven't gotten to the K&N yet.
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Old 07-25-2010, 08:41 AM   #14
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It would have been nice to see the effect each filter had on performance, the Delco looks great for restricting dirt, but i guess that means air restriction as well?
I wonder what the "happy medium" filter is, good dirt trapping as well as decent airflow to the motor.
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Old 07-25-2010, 09:36 AM   #15
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It would have been nice to see the effect each filter had on performance, the Delco looks great for restricting dirt, but i guess that means air restriction as well?
I wonder what the "happy medium" filter is, good dirt trapping as well as decent airflow to the motor.
Not even the OE air filter restricts air flow to the TJ's engine. While some engines have air intake systems that were purposely designed to be somewhat restrictive, the TJ's was designed to be completely non-restrictive. It is well known to be more than capable of flowing more air than the engine is capable of consuming at wide-open-throttle at redline rpms.
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Old 07-25-2010, 10:50 AM   #16
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Jerry: assuming the air can get thru the filter to the engine.
My point was the air restriction of the filter, not the design of the air intake system.
If the filter won't let the air thru, it doesn't matter how good the system is.
So I was just thinking it would be nice to find a filter that is as restrictive as possible to dirt but not air, which i guess is contradictory, but I'm sure there's a filter out there that provides a decent balance .
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Old 07-25-2010, 11:02 AM   #17
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Jerry: assuming the air can get thru the filter to the engine.
My point was the air restriction of the filter, not the design of the air intake system.
If the filter won't let the air thru, it doesn't matter how good the system is.
So I was just thinking it would be nice to find a filter that is as restrictive as possible to dirt but not air, which i guess is contradictory, but I'm sure there's a filter out there that provides a decent balance .
The air intake system described of course includes the OE style air filter. The OE style air filter, which has a huge surface area, is included in that statement that confirms the OE air intake system is more than capable of providing more air than the engine can consume even at WOT and redline engine rpms.
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Old 07-29-2010, 10:20 PM   #18
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Restrictive

I don't know man this little tiny hole looks pretty restrictive to me as compared to the K&N then you ad the thick filter with the foam on the bottom
plus am not planning to do alot of dusty desert driving
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Old 07-29-2010, 10:33 PM   #19
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I don't know man this little tiny hole looks pretty restrictive to me as compared to the K&N then you ad the thick filter with the foam on the bottom
plus am not planning to do alot of dusty desert driving
There's a difference between adequate and restrictive. More is not always better... if the engine will only use a certain amount of air then adding more will not have any kind of effect to it. Also You'd be surprised... I used to tune VR6 engines, and EVERYBODY took the box off.. and replaced it with an open element. There is colder air in that box... by over 15 degreesF ... then there was with the open element. The only thing you will add (that I found) ... was a 'cool' engine sound
Also, you have to look at the design of the engine... Jeep Wranglers are possibly the worst platform in the history of vehicles, to try and be speedy in... Our engines were built for longevity and utility.. not to mention the aerodynamic nightmare of the body of the jeep.
Not to tell you what to do.. but if I was going to spend 200-400 on 2 parts that MIGHT or MIGHT NOT change or hurt something... I'd put that money into checking plugs, wires, (depending on year) distributor cap, rotor, worn muffler, cat, suspension pieces, drivetrain pieces.. and work on extending the life, and making it run better, instead of squeaking 4 HP out of a jeep.

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