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Which air induction set-up would you install on your KJ?
K&N 57 Series FIPK (57-1540) 0%  0%  [ 0 ]
K&N 77 Series (77-1540KP) 22%  22%  [ 2 ]
AEM Brute Force (21-8309DP) 11%  11%  [ 1 ]
Use Factory Air Box with K&N Panel Air Filter (33-2233) 67%  67%  [ 6 ]
Total votes : 9
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 Post subject: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Systems
PostPosted: Mon Sep 20, 2010 2:18 am 
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I have been doing a lot of research on air induction systems for the KJ, not only on this forum but also on Jeep Forum and JeepKJ Country. I am looking to improve my fuel economy and gain horsepower; I know you cannot have your cake and eat it too. I am not looking for HUGE improvements or gains, but everything helps! I do plan on modifying my exhaust also to help achieve what I am looking for. I have the AEM V2 Dual Chamber Intake System and the Injen HydroShield Pre-Filter installed on my Acura CL and absolutely love this set-up! I would like to install a cold air intake on my KJ, but it appears no company makes a true cold air intake for it. The closest thing to a true cold air intake that I discovered was long_tall_texan's LTT True Cold Air Intake for KJ's [http://tiny.cc/15v5o]. I do not want to go with an off-brand company intake (e.g. the ones found only on eBay). Thus, I am considering the following intakes: K&N 57 Series FIPK (57-1540) [http://tiny.cc/v4dm9], K&N 77 Series (77-1540KP) [http://tiny.cc/mijw3], and AEM Brute Force (21-8309DP) [http://tiny.cc/ec3dp]. I will probably install an Injen HydroShield Pre-Filter [http://tiny.cc/es2ou] on my KJ's intake. I am also considering just using the factory air box and installing a K&N Panel Air Filter (33-2233) [http://tiny.cc/rn3g7].

Since I have experienced an AEM intake, I would like to try another manufacturer [K&N] to see how they compare. The 57 Series FIPK MSRP is $266.99 and the 77 Series MSRP is $349.99. Although the 77 Series costs more, I believe the 57 Series FIPK offers more benefits. The 57 Series FIPK's estimated horsepower gain is 6.36 HP at 5,274 RPM vs. the 77 Series' 5.92 HP at 4,054 RPM. Also, the 57 Series FIPK uses a crosslink nylon intake tube that provides cooler air than a metal intake, which is what the 77 Series is composed of. With this information, why does the 77 Series cost $83 more than the 57 Series FIPK but offer less benefits? Which air induction set-up would provide me with the best fuel economy improvement and horsepower gain? Does anyone have either of these set-ups installed on their KJ? If so, how do you like it? Thanks in advance for you help!


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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon Sep 20, 2010 2:30 am 
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i had a K&N 57 series on my Jeep until a few days ago. some people say that the oil on the K&N filters can ruin sensors. ive never had a problem as long as you dont soak the filter or something. ive also owned an intake on another vehicle with the AEM dryflow air filter and i think its a much better filter. the only difference in the 57 and 77 series is that the 57 has plastic tubing, which is suppose to keep the air cooler. when an engine warms up and the aluminum piping warms up the cold air doesnt stay as cool. also, never pay attention to dyno numbers posted by the manufacturer.


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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon Sep 20, 2010 6:29 am 
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The stock box and a good papar filter is more then enough for the KJ could ever use.It's a Jeep and going slow and bad mpg's is the norm.


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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon Sep 20, 2010 6:58 am 
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NONE of the above
Stock box, and either a regular paper filter or an Amsoil one
best setup I have had on mine and tried a few
best mileage and all around performance
Used to run K&N on everything I had, but no more!!!
So for me stock box, Amsoil filter and a 3 inch hose to the grill.
Save your money that you would spend on cheap junk filter setups and put it towards other things for your Jeep

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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Tue Sep 21, 2010 10:08 am 
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There is no option for "NEITHER" so I didn't vote. The Chrysler 3.7 and 4.7 engines don't get a **** bit of good from a "cold air intake" kit. I have experimented heavily with this, and trust me when I say you won't get any MPGs and you will lose a little low end torque as well. It may breathe slightly better above 4,500 RPM... but how often do you keep your engine above 4,500 RPM? Exactly.

Keep the stock setup and buy a good Purolator paper filter from Advance Auto Parts. Bingo.

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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Tue Sep 21, 2010 3:37 pm 
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x4 on keeping the stock box. I ran K&N drop in filter for a while, but went to Amsoil and have the same power with better filtration. If you want "cold" ait direct to the airbox, check out the $4 gutter mod, or PM me for one of my setups.

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- DIY Franky sitting at 23.75" - Al's 4.5 UCAs - Trimmed F&R Bumpers
- Removed Rear Sway Bar - Removed Rear Vibration Damper
- 75k miles so far...
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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Tue Sep 21, 2010 8:59 pm 
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tommudd wrote:
NONE of the above
Stock box, and either a regular paper filter or an Amsoil one
best setup I have had on mine and tried a few
best mileage and all around performance
Used to run K&N on everything I had, but no more!!!
So for me stock box, Amsoil filter and a 3 inch hose to the grill.
Save your money that you would spend on cheap junk filter setups and put it towards other things for your Jeep


^^ That.

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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Tue Sep 21, 2010 10:56 pm 
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JJsKJ wrote:
tommudd wrote:
NONE of the above
Stock box, and either a regular paper filter or an Amsoil one
best setup I have had on mine and tried a few
best mileage and all around performance
Used to run K&N on everything I had, but no more!!!
So for me stock box, Amsoil filter and a 3 inch hose to the grill.
Save your money that you would spend on cheap junk filter setups and put it towards other things for your Jeep


^^ That.

^^^That.
I don't run the hoser though, ehhh.


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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon Sep 27, 2010 1:36 am 
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Well, you guys have basically convinced me to go with the factory air box and AMSOIL Ea Air Filter (EAA201-EA) [http://tiny.cc/xp3t2] for my set-up. The only way I could justify spending that much money for such little gains is the improved sound quality. How do the aftermarket intakes sound on the KJ? The AEM V2 changed my Acura's sound drastically.

DirtyKK wrote:
i had a K&N 57 series on my Jeep until a few days ago. some people say that the oil on the K&N filters can ruin sensors. ive never had a problem as long as you dont soak the filter or something. ive also owned an intake on another vehicle with the AEM dryflow air filter and i think its a much better filter. the only difference in the 57 and 77 series is that the 57 has plastic tubing, which is suppose to keep the air cooler. when an engine warms up and the aluminum piping warms up the cold air doesn't stay as cool. also, never pay attention to dyno numbers posted by the manufacturer.


The 57 series sounds like it's a better intake, but the 77 series costs more :? Why do you say, "never pay attention to dyno numbers posted by the manufacturer"? I can see where that would make sense if the test was product specific and they averaged the results from all vehicles involved in the test. But, when the test is vehicle specific, I would think the dyno numbers would be pretty accurate...


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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon Sep 27, 2010 7:34 am 
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The sound of air sucking in does nothing for overall performance, if you like that then go with a cheap CAI and have decreased performance

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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon Sep 27, 2010 1:15 pm 
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I have fabbed up several intake setups for my jeep. All in all I can say with 100% certainty that the only thing that changes is throttle response....for a day or two. Then they are all the same. I personally use a K and N panel filter in the stock box and Im really considering the LTT mod for my 06 (if he is still making them). No matter what Im doing I notice very little to no difference with anything after market. The metal smooth tubes I noticed the most (zero HP just response) but after getting heat soaked it actually decreased performance a little. Granted that could be fixed with some heat wrapping and a filter block off, but the stock setup works just as good.

As for drop in replacements I do recommend doing something other then paper for savings alone. For m its never been a power thing, more or less its to save a ton of money from not having to buy a ton of paper filters. As far as brand goes its all personal preference. I have never had an issue with k and n filters in all the cars I have owned over the past 10+ years, but would I use another brand like amsoil? Sure if they were at my local auto parts store I would have tried them out. But alas k and n is the only one I could get in a pinch.

Always remember these are jeeps and not meant to be fast, therefore engine gains through power adds will be insignificant at best. The most you will ever get is smoother acceleration and some throttle response.

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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon Sep 27, 2010 1:29 pm 
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liquidxit2 wrote:
... and Im really considering the LTT mod for my 06 (if he is still making them).


Yep. Still making them for 05-07 models.

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2007 Light Khaki 4x2 Sport
- Debadged - LTT CAI with Amsoil Filter - JVC HD Radio - Infinity BassLink
- Iggee Seat Covers - Black Moabs - 265/75-16 Cooper Discoverer ATP - 4.10's
- DIY Franky sitting at 23.75" - Al's 4.5 UCAs - Trimmed F&R Bumpers
- Removed Rear Sway Bar - Removed Rear Vibration Damper
- 75k miles so far...
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 Post subject: Dual Air Intake
PostPosted: Sun May 01, 2011 11:41 pm 
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I discovered a dual air intake kit on a YouTube video: http://tiny.cc/dxhvo. I found this dual intake on eBay: http://tiny.cc/b5cyq. What do you guys think of this dual air intake kit? Does anyone have any experience with this kit?


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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon May 02, 2011 12:03 am 
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WORST possible buy you could ever make I would say, talk about sucking hot air in all day long!
Run away :ROTFL:

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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon May 02, 2011 12:47 am 
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tommudd wrote:
talk about sucking hot air in all day long!

Yeah, that's what I was thinking also. The filters are located right above the engine, and we all know heat rises :twisted: I was mainly wondering if anyone bought this kit and how they like...


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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon May 02, 2011 1:41 am 
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Well I got a k and n fipk and it improved throttle response nicely but with the learning feature mixed with torque management you'll never gain hp or torque without a bg tune. But if you want to try and flaten the curve and improve throttle response then go for an intake.

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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon May 02, 2011 2:19 am 
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liquidxit2 wrote:
Well I got a k and n fipk and it improved throttle response nicely but with the learning feature mixed with torque management you'll never gain hp or torque without a bg tune. But if you want to try and flaten the curve and improve throttle response then go for an intake.

I plan on purchasing the K&N 57 Series FIPK. Are you referring to the B&G Jeep Liberty/Nitro/Compass PCM Flash (02-08 JTEC-NGC) [http://bgspecialists.com/] when you say a "bg tune"?

I was hoping to get my computer flashed, or something of the sort, once I install my 2.5" lift, 245/70/16 tires, and intake. Is the B&G flash my only option?


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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon May 02, 2011 1:53 pm 
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Yeah http://www.bgperformancepcm.com/

I went with plastic for better heat resistance. Again dont plan on getting any HP/TQ gains until you gte a flash as the computer will always tune the engine for 210HP 235FT/lbs. But the throttle response is pretty nice and I plan on doing a BG tune pretty soon, but I have to first pay of my lift and fastman throttle body.

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 Post subject: Re: K&N 57 Series FIPK vs. K&N 77 Series Air Induction Syste
PostPosted: Mon May 02, 2011 11:55 pm 
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liquidxit2 wrote:
Yeah http://www.bgperformancepcm.com/

I went with plastic for better heat resistance. Again dont plan on getting any HP/TQ gains until you gte a flash as the computer will always tune the engine for 210HP 235FT/lbs. But the throttle response is pretty nice and I plan on doing a BG tune pretty soon, but I have to first pay of my lift and fastman throttle body.

That's why I am considering the 57 Series FIPK over the other intakes, since it's made out of plastic. I mainly want to flash my computer to improve gas mileage, not for HP/TQ gains (however, these gains would also be nice). Is there anything else I can do to improve my gas mileage (i.e. make the computer recognize the new mods) instead of paying $350 for the B&G flash?


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