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Ian
Dodge Dakota
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9/17/2002
23:52:49
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 Subject: stock air intake design on 4.7
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just some thoughts...it seems as though many aftermarket cold air intakes are not making nearly as much of a gain on the 4.7 as on the magnum engines (I.e. the K&N Fipk makes only 5-7 hp)...common sense would tell me that the stock design is pretty efficient. With this in mind, my question is would a drop in K&N filter add any benefit whatsoever or would I possibly lose power considering the drop in maybe pulling in more hot air than the stock air filter?
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Dommie
Dodge Dakota
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9/18/2002
02:04:57
| RE: stock air intake design on 4.7
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What?
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Dan Gruber
GenIII
 
9/18/2002
05:30:21
| RE: stock air intake design on 4.7
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A drop-in replacement filter will have no effect on the temp of air entering the intake. The only things that will change the intake air temp while still using a drop in filter in the stock air box are drilling holes in the bottom of the airbox or removing the air snorkel that pulls air from the fenderwell into the airbox.
I used to run an airaid (open filter) on my 4.7. Worked pretty good in cool weather but got a little sluggish in hot weather. I switched to an IP Z-tube with the cold air cannister and it has worked great in cold and hot weather. I was a little concerned about the tube itself heating up the intake air since the tube is metal and it does get pretty warm, but it seems to do better than the open filter in hot weather. But that's just the butt-dyno...I have no numbers to back up what I'm saying.
Dan
2000 CC SLT 4.7 4X4 Auto 3.92 LSD
3 inch Performance Accesories lift & 32 inch BFG MT KM's
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dac_beth
Dodge Dakota
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9/18/2002
06:57:36
| RE: stock air intake design on 4.7
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It is my opinion that a K & N replacement filter will show you some increased air flow to your engine, I used them in several vehicles all with excellent results.
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Bob W
GenIII
9/18/2002
19:55:16
|  RE: stock air intake design on 4.7
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The stock intake with a K&N drop in filter is about as good as it gets. It pulls cool air from the windshield area. The K&N drop in filter should have better flow characteristics (but I have no proof of that) I was surprised the stock filter had printed flow spec’s on it, I have not seen flow specs on the K&N but I use em because I believe.
Gibson headers, Gibson Cat-back, Edelbrock IAS shocks, K & N drop in, 180 stat, Jet stage II chip, ARE Lid
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Art
Dodge Dakota
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9/18/2002
20:21:51
| RE: stock air intake design on 4.7
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K&N filters are way overrated IMO,They flow very well when new but a month later the flow drops of alot especially if you drive in a dusty area not to mention that they filter the air quite badly.I used to have the z-tube with the 9inch pro-flow on my 4.7 and found it worse than with the stock setup in TQ but it did help a little over 3000rpm,like the post above says the stock setup pulls colder air than any of the aftermarket setups outthere
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R.L.Stuart
Dodge Dakota
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9/18/2002
21:30:40
| RE: stock air intake design on 4.7
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If you look inside the stock air box you will see two air chambers that gives you a standing wave of air to the TB,I have tried the K&N and Airaid systems and went back to the stock box,I did mod it to 3 inches to mate it to the 70mm TB.To get cold aie I did move the heater hoses from under the TB and run them around the fire-wall to reduce the heat on the air box.
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superman
Dodge Dakota
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9/18/2002
23:13:32
| RE: stock air intake design on 4.7
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you know, that shaker thing works pretty.........
good................17HP on the dyno.............
........25 if you add a cat back.........
just my 2 cents
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dabart65
Dodge Dakota
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9/18/2002
23:31:44
|  RE: stock air intake design on 4.7
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K&N drop-in does not filter as well as stock?!?!?!
I'm freaked. Thinking I might put the stock filter back on. Anyone have any data on flow and filter performance for stock and K&N?
'02 4.7 CC
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Art
Dodge Dakota
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9/19/2002
02:13:49
| RE: stock air intake design on 4.7
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Message:
No they dont,especially if you go offroading alot.K&N even recommends a oil foam wrap on top of there filter for any dusty areas.$6.85 here in canada for a new replacement stock filter for the 4.7,I toss it every 6 months when I change my oil,cant beat that in IMO.
http://www.seansa4page.com/resource/airfilter.html
http://www.pilot-odyssey.com/~hoser/web/K%26N.htm
I used to swear by them but not anymore,just take a look at them after you wash them out and re-oil,the holes get bigger :)
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dontworryabot
Dodge Dakota
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9/19/2002
18:14:14
|  RE: stock air intake design on 4.7
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where do you get off thinking the FIPK only adds 5-7 hp???
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sandman
Dodge Dakota
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9/19/2002
18:20:25
| RE: stock air intake design on 4.7
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If you want cool air just add an intercooler. Then after you have the intercooler on you have an excuse to save up for a nice turbo or super charger to go with it!!
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marvin
Dodge Dakota
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9/19/2002
19:03:15
| RE: stock air intake design on 4.7
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will a hypertech stage 2 chip for my brand new 2003 dakota void the warranty? Is a K&n FIPK worth it? my buddy says that he feels a big diffrence in his RTs intake????
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dabart65
Dodge Dakota
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9/19/2002
21:16:32
| RE: stock air intake design on 4.7
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Anyone want to buy a K&N drop-in for 4.7L + cleaner/oil kit? I now have one for sale. E-mail me! Like $25+shipping (about $5) and it's yours.
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mopar2ya
GenI
9/19/2002
23:31:32
| RE: stock air intake design on 4.7
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Message:
If you read the posts and various performance web sites closely the people/representatives that sell air intakes (k&n, airaid, volant whomever) are the one's that say the 4.7 stock air hat is sooooooooo restrictive.
The 4.7 owners that actually buy them don't think there that great, especially for the money paid.
Why do you think air intake sellsman say the stock hats are soooooooooooo restrictive? (rhetorical question)
mopar2ya
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Texas Todd
Dodge Dakota
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9/20/2002
10:13:11
|  RE: stock air intake design on 4.7
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I'll sell my 4.7 drop in K&N filter, (less than a year old), AND the cleaner and re-oil kit (never opened) for $25-Shipped!
E-mail if you want it, going with a Cone on my homebrew.
Todd
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aj
Dodge Dakota
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3/26/2004
02:43:00
| RE: stock air intake design on 4.7
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04 CC 4wd, 4.7 5spd auto.
I think the bottleneck is at the inlet to the box. That tube is about 3. I say make it 4 or 4.5 and fahion another plasic 4.5 inch tube exactly to the stock position next to the fender.
IMHO the key is filling that stock box with air fast creating that downdraft in the tube. I just got the dam thing and was looking at the setup.
Put on a magna flow with stock pipes 2.5 thats it so far, only 220 miles
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01Motorsport
Dodge Dakota
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3/26/2004
16:08:09
| RE: stock air intake design on 4.7
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Remove the stock elbow inlet and the rubber flap between the radiator and headlight. Buy a Fernco 4" "no-hub" from Home Depot or Lowe's for about $7, and now you have "mini ram air" to the stock box. For my homebrew 4.7 details, check out the post "What is the best intake?".
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aj
Dodge Dakota
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3/27/2004
23:44:15
| RE: stock air intake design on 4.7
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http://pages.sbcglobal.net/ajmarathon/_uimages/DSCF0001.JPG
Here is your ideas with a 22 degree and a 45 degree pvc pipe. I haven't tried either yet, but they help direct the draw from the fender. Put your piece on then slide the pvc on and adjust it, Like you said the PVC also has that venturi effect because of the larger opening. I suspect that small 22 degree angle one will be it. If you are real crazy sand the outside and clean it up, then grind the inside till it is very thin plastic. Use 60 or 80 grit and work your way smooth and polish inside of the pvc pipe, The pipe starts out at about 1/8 inch you can grind a considerable amount from the inside.
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aj
Dodge Dakota
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3/28/2004
21:06:43
| RE: stock air intake design on 4.7
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I also stuffed some plastic wrapped insulation in the fender well behind the opening to the old snorkle. The air will enter the fender and be diverted into the area around the fernco. I didn't remove the rubber flap. I cut 2 2x2 holes in it. I found the truck was a dog at high speeds without diverting some air into the front of the fernco. Works great now with diverted air from the fender and the holes.
Obviously I can't give technical data but it seems to definitely have more throttle out of the hole, slight increase in the response.
The extra parts don't fit to bad there easn't enough room for the 22 degree fitting
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