Is it true? CAI or filter change alone - Jeep Commander Forums: Jeep Commander Forum
Intakes Questions or advice about intakes? This is the place...

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post #1 of 36 (permalink) Old 06-14-2008, 09:44 PM Thread Starter
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Is it true? CAI or filter change alone

I went looking for a CAI for my Jeep and the guy at the auto parts said I would get almost the same performance just changing out the filter to a K & N filter. It sounds like it makes sense. Is this true and has anyone else tried this? After all I would much rather spend the 50 bucks on a filter and not the 300 bucks for the CAI.
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post #2 of 36 (permalink) Old 06-14-2008, 10:21 PM
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I removed snorkle from front of air box and put a k&n filter in... I feel that I got better throttle response and about 1-2 mpg

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post #3 of 36 (permalink) Old 06-14-2008, 10:24 PM
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There are some people in here that are happy with the drop in filter, I’m sure it make a difference, but I don’t think that is going to be the same as a CAI, I’m not sure on what engine is in your XK, but in my case, I have the 4.7 and the K&N does remove a lot of unnecessary turns on the intake the original box and intake have so much restriction that the air flow is way better on a CAI, also the materials on a CAI can repel heat, keeping the air cooler as it enter the engine, I would say go with the CAI if it fits your budget at the time…
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post #4 of 36 (permalink) Old 06-14-2008, 10:57 PM
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I also have the 4.7 and I know that I tossed a big pile of black plastic parts and replaced them with a tube with a single curve. It seems to me that from an airflow standpoint there in now a much smoother and less restricted path to the intake. I know that the sound is much healthier. Maybe it is almost as good to just replace the filter, but I doubt it.

I also just noticed that you are from Phoenix. We have a group that is going on a trail ride up to Sedona on the 28th and over to a49erfans for BBQ after. Check with John (a49er****) for details or check the thread on the Arizona Club

https://www.jeepcommander.com/forums/...ona+commanders
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2007 Jeep Green Limited 4.7 Flex Fuel, RR 2.5" 4 inch Superlift coils on rear, 1.5" Spacers, Bridgestone 265/70/17, K&N CAI, Flowmaster, Diamond Plate Locking Trunk, Blue Ox Baseplate w/D-rings, "Get Lost 4X4" Front Bumper, T-Max 9000 winch, "Get Lost rear tire carrier, 30 gal second gas tank.
Second 2007 Jeep Green Limited Leather HEMI QDII VES Uconnect Flowmaster OEM Skids Tow Package

Maybe the two will meet up soon edit: they did , I now have 2,now gave 1 away...and got it back again.

Last edited by HueyPilotVN; 06-14-2008 at 11:14 PM.
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post #5 of 36 (permalink) Old 06-15-2008, 12:18 AM
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A friend of mine on an Intrepid website did a comparison on a dyno between a complete CAI system and a K&N drop-in with the factory tube swapped out between the box and throttle body. The difference was between 1-2 hp in favor of the CAI.


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post #6 of 36 (permalink) Old 06-15-2008, 12:50 AM
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Question

Quote:
Originally Posted by YB Normyl
A friend of mine on an Intrepid website did a comparison on a dyno between a complete CAI system and a K&N drop-in with the factory tube swapped out between the box and throttle body. The difference was between 1-2 hp in favor of the CAI.

"If" that is the case, 1 or 2 HPs for $280 may not be that good of a deal, and I'm not saying that what you said is not right, but I have a very hard time beleaving it, I'm not sure how restricted the stock intake on a Intrepid is, but at least on the 4.7 XK, the diference on the intake is big, may be diferent in the XKs case...
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post #7 of 36 (permalink) Old 06-15-2008, 01:45 AM
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Quote:
Originally Posted by ROMEO
"If" that is the case, 1 or 2 HPs for $280 may not be that good of a deal, and I'm not saying that what you said is not right, but I have a very hard time beleaving it, I'm not sure how restricted the stock intake on a Intrepid is, but at least on the 4.7 XK, the diference on the intake is big, may be diferent in the XKs case...
Don't forget, the only thing left stock with the K&N drop-in was the box itself. The tube running to the throttle body would be the same as the tube in the CAI. The part with the most restriction is between the box and the TB. In most cases the factory box is more of a cold air box than just having an open cone filter.


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post #8 of 36 (permalink) Old 06-15-2008, 01:53 AM
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Quote:
Originally Posted by HueyPilotVN
I also have the 4.7 and I know that I tossed a big pile of black plastic parts and replaced them with a tube with a single curve. It seems to me that from an airflow standpoint there in now a much smoother and less restricted path to the intake. I know that the sound is much healthier. Maybe it is almost as good to just replace the filter, but I doubt it.

I also just noticed that you are from Phoenix. We have a group that is going on a trail ride up to Sedona on the 28th and over to a49erfans for BBQ after. Check with John (a49er****) for details or check the thread on the Arizona Club

https://www.jeepcommander.com/forums/...ona+commanders
acting for jeep5253 and putting up your pic





as for the thread issue, I have no experience with K&N filter and CAI.

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Spidertax 1.5" wheel spacer, K&N replacement filter
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post #9 of 36 (permalink) Old 06-15-2008, 04:33 AM
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Ahmed,

Thank you Sir for posting the picture like Jeep5253 does. One of these days I do have to practice doing that myself.

2007 Jeep Green Limited 4.7 Flex Fuel, RR 2.5" 4 inch Superlift coils on rear, 1.5" Spacers, Bridgestone 265/70/17, K&N CAI, Flowmaster, Diamond Plate Locking Trunk, Blue Ox Baseplate w/D-rings, "Get Lost 4X4" Front Bumper, T-Max 9000 winch, "Get Lost rear tire carrier, 30 gal second gas tank.
Second 2007 Jeep Green Limited Leather HEMI QDII VES Uconnect Flowmaster OEM Skids Tow Package

Maybe the two will meet up soon edit: they did , I now have 2,now gave 1 away...and got it back again.
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post #10 of 36 (permalink) Old 06-15-2008, 08:40 AM
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I had something similar to the CAI on my Wrangler and I had a bad experience with it. I was off roading and had to drive through a deep puddle, about 3 feet deep but only around 8 feet long. I was doing about 8-10 MPH when I hit the water and I guess the spalsh was sucked in by the external filter and shut me down. I had to get a friend to tow me back down the trail. I feel that if I had the factory box on, I would not have sucked in any water and I would have been fine. I took off the external filter set up the following day and replaced the factory box with without the snorkel and never had that problem again. Just sharing my expierence with everyone.

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