Whick air intake for a 996
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I agree that louder in every case doesnt equal more horsepower. The easiest example that comes to mind would be a hole in an exhaust pipe or something similar, e.g. a leaking exhaust manifold gasket. In the case of the K&N on my stock 996C2, this was the first mod. Clearly looking at the configuration versus the stock box will reveal that the air path into the motor allows for a greater flow, in addition to the filter element being less restrictive. So at speed, since it uses the stock air dam, which is close to a true ram air duct, moving faster does in fact result in more air flowing in. The principle of the ram air concept is not new. I suppose I could have been more precise in my statement about what the source of the sound was. The louder intake sound is coming from something! In this case the only thing it could be coming from is the intake system. So the air intake sound equals more air coming into the motor, which has to equal more power. More air into the engine must necessarily equal more power. I dont believe this can be reasonably disputed.
The oil-filled airfilters is also known to destroy the MAF.
Increased power from a different airfilter will only happen if the ECU is remapped as well.
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From personal experience , I would highly recommend the K&N CAI system for your 996. I am convinced that K&N did considerable research in designing the system and optimized the tuned port length for the engine. I have installed 2 of these, one on my own car and am very pleased with it. However.....I would suggest that you replace the supplied filter that came in the kit with an AEM DRY FILTER 21-204DK. The AEM filter is a great filter and has several advantages over the supplied filter that came in the kit.Lets look at them.
After some reflective thought, I would STRONGLY URGE,COERCE,or ADMONISH you to replace the original supplied oiled gauze K&N filter with the AEM filter.
First....NO OIL is used on the AEM filter, thus the DRY FILTER nomenclature. The filter is indeed dry and uses NO OIL. This is extremely important in the sense that many a foul word has been slung at the oil used in the supplied filter and its ill effect upon the sensitive MAF that is downstream in the system. Many have lamented that it is the oil from the filter that has caused their MAF to cease functioning properly and cause a DTC to be dispatched to the CEL light in the dash. I cannot verify if this is correct or not....however it seems prudent to me to remove the oil from the system and thus remove the possibility of the oil indeed "wasting" the fragile MAF, and if you can do it while getting better filtration...well that is way cool. AEM use to manufacture oil /cotton gause based fiters and halted production of them in favor of their cutting edge DRY FILTER media,I am glad they did.I might add at this juncture that I have NO affiliation with AEM or K&N.
Second...The AEM is a very high flow filter. I spoke with their tech and he informed me that the AEM 21-204DK filter had a max air flow rating of 875 CFM. The 3.4L engine at 7000 rpm and 100% VE% ( in reality it is closer to 85%) needs about 420 cfm...soo the AEM filter will supply roughly TWICE the needed cfm for the engine. Wow, I know I can rest easier now.
Third..The AEM filter has an very high dust holding capacity while maintaining an very high degree of filtration, down to as small as 1 micron in size. That is quite impressive and quite important as I live in the Southwest .
Fourth...The AEM is lighter and thus has less weight on the end of the "snorkel", ok.. the tuned port for you wise guys, if in fact that was a problem with the system which it is not from my experience.
Fifth...The AEM is washable and reusable. It very strong and can be washed and reused many times in the future.
Sixth....The AEM is a direct replacement for the originally supplied filter and fits nicely to boot.
Seventh...The dry media that is used in the manufacture of the filter is water repellant or hydrophobic ( I think of my cat as hydrophobic...not an air filter) but not water proof. For those of you that are overly concerned about ingesting water into your engine, keep your car out of the lake or do as I did. I purchased a INJEN HYDRO-SHIELD PRE-FILTER (large, X-1034) that simply slips over the filter and provides some protection from water ingestion. The Hydro-shield is again water resistant or hydrophobic and NOT water proof.I just love the word hydrophobic, I hope I get the chance to use it in the future.
Lastly...did I mention that the filter was dry and did not use oil....oh yes I did, but is important enough to mention it again as it seems that many have written about the problem of using an oiled gause filter and the alledged ill effect on the MAFthat can result. The AEM filter puts all those fears to rest and performs better .... what more could one ask!
I have read on this thread that installing the K&N CAI system was tedious and akward...well not really. I have done two of them and I find that I can put it together in about an hour . While you are doing the install and you are "in there" , go ahead and put a plenum on and relish the growl and midrange punch ! I am absolutely delighted with my setup (along with some freeflow mufflers) .
SOOOO.....If I was looking for a CAI system for my 996, I would go on ebay and buy the K&N CAI system CHEAP from someone who was fed up with the oil from the original filter fouling their MAF and the hassle with the CEL light. I would then buy the AEM filter and replace the K&N filter in the CAI system. With the AEM installed, ther is no oil to foul the MAF and no more CEL lights to contend with. I can speak from personal experience as to this issue. I installed the K&N CAI on my 2001 996, and YES, I got the CEL light within 100 miles. But I simply fell in love with the "DEEP GUTTERALGROWL" sound of the engine pulling up through the midrange and quick rush to rev limiter that I experienced. I thus took on a long and ardous research of both this forum and of Rennlist to ascertain the problem. It seemed that there was some body of evidence to suggest that it was the oil from the K&N oiled gauze filter that was polluting the MAF. I stumbled onto the AEM website and ....eureka, The answer was staring me in the face from cyberland. I installed the AEM DRY FILTER in place of the K&N oiled gauze filter along with a new MAF and I have been in bliss ever since.I have been about 600 miles with no CEL light and nothing pending! WOW, I have to take a breath for a moment here to calm down.
Well before I sign off did I mention that the AEM uses NO OIL.....oh yes I did and please excuse me for being redundant....and did I also mention that I relish the "deep gutteral growl" of the CAI system....it seems as I did....mea culpa.
I hope this helps in some small way.
Vaya Con Dios
Palma
After some reflective thought, I would STRONGLY URGE,COERCE,or ADMONISH you to replace the original supplied oiled gauze K&N filter with the AEM filter.
First....NO OIL is used on the AEM filter, thus the DRY FILTER nomenclature. The filter is indeed dry and uses NO OIL. This is extremely important in the sense that many a foul word has been slung at the oil used in the supplied filter and its ill effect upon the sensitive MAF that is downstream in the system. Many have lamented that it is the oil from the filter that has caused their MAF to cease functioning properly and cause a DTC to be dispatched to the CEL light in the dash. I cannot verify if this is correct or not....however it seems prudent to me to remove the oil from the system and thus remove the possibility of the oil indeed "wasting" the fragile MAF, and if you can do it while getting better filtration...well that is way cool. AEM use to manufacture oil /cotton gause based fiters and halted production of them in favor of their cutting edge DRY FILTER media,I am glad they did.I might add at this juncture that I have NO affiliation with AEM or K&N.
Second...The AEM is a very high flow filter. I spoke with their tech and he informed me that the AEM 21-204DK filter had a max air flow rating of 875 CFM. The 3.4L engine at 7000 rpm and 100% VE% ( in reality it is closer to 85%) needs about 420 cfm...soo the AEM filter will supply roughly TWICE the needed cfm for the engine. Wow, I know I can rest easier now.
Third..The AEM filter has an very high dust holding capacity while maintaining an very high degree of filtration, down to as small as 1 micron in size. That is quite impressive and quite important as I live in the Southwest .
Fourth...The AEM is lighter and thus has less weight on the end of the "snorkel", ok.. the tuned port for you wise guys, if in fact that was a problem with the system which it is not from my experience.
Fifth...The AEM is washable and reusable. It very strong and can be washed and reused many times in the future.
Sixth....The AEM is a direct replacement for the originally supplied filter and fits nicely to boot.
Seventh...The dry media that is used in the manufacture of the filter is water repellant or hydrophobic ( I think of my cat as hydrophobic...not an air filter) but not water proof. For those of you that are overly concerned about ingesting water into your engine, keep your car out of the lake or do as I did. I purchased a INJEN HYDRO-SHIELD PRE-FILTER (large, X-1034) that simply slips over the filter and provides some protection from water ingestion. The Hydro-shield is again water resistant or hydrophobic and NOT water proof.I just love the word hydrophobic, I hope I get the chance to use it in the future.
Lastly...did I mention that the filter was dry and did not use oil....oh yes I did, but is important enough to mention it again as it seems that many have written about the problem of using an oiled gause filter and the alledged ill effect on the MAFthat can result. The AEM filter puts all those fears to rest and performs better .... what more could one ask!
I have read on this thread that installing the K&N CAI system was tedious and akward...well not really. I have done two of them and I find that I can put it together in about an hour . While you are doing the install and you are "in there" , go ahead and put a plenum on and relish the growl and midrange punch ! I am absolutely delighted with my setup (along with some freeflow mufflers) .
SOOOO.....If I was looking for a CAI system for my 996, I would go on ebay and buy the K&N CAI system CHEAP from someone who was fed up with the oil from the original filter fouling their MAF and the hassle with the CEL light. I would then buy the AEM filter and replace the K&N filter in the CAI system. With the AEM installed, ther is no oil to foul the MAF and no more CEL lights to contend with. I can speak from personal experience as to this issue. I installed the K&N CAI on my 2001 996, and YES, I got the CEL light within 100 miles. But I simply fell in love with the "DEEP GUTTERALGROWL" sound of the engine pulling up through the midrange and quick rush to rev limiter that I experienced. I thus took on a long and ardous research of both this forum and of Rennlist to ascertain the problem. It seemed that there was some body of evidence to suggest that it was the oil from the K&N oiled gauze filter that was polluting the MAF. I stumbled onto the AEM website and ....eureka, The answer was staring me in the face from cyberland. I installed the AEM DRY FILTER in place of the K&N oiled gauze filter along with a new MAF and I have been in bliss ever since.I have been about 600 miles with no CEL light and nothing pending! WOW, I have to take a breath for a moment here to calm down.
Well before I sign off did I mention that the AEM uses NO OIL.....oh yes I did and please excuse me for being redundant....and did I also mention that I relish the "deep gutteral growl" of the CAI system....it seems as I did....mea culpa.
I hope this helps in some small way.
Vaya Con Dios
Palma
Last edited by Palma; Jan 6, 2009 at 04:50 PM.
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Joined: Apr 2005
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Palma,
Do a search on here or Rennlist. The K&N has a bad reputation for throwing CEL's and fouling MAF's (especially on MK I's).
Again, don't take my word for it, do a search.
Just saying......
Do a search on here or Rennlist. The K&N has a bad reputation for throwing CEL's and fouling MAF's (especially on MK I's).
Again, don't take my word for it, do a search.
Just saying......
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Joined: Apr 2008
Posts: 222
From: USA
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ray,
i may have misread palmas post but he was suggesting using the K&N CAI but crucially replacing the filter with an oil free high flow alternative from another supplier. this actually sounds like a positive idea to me. the K&N certainly has enough of a worry to it that its caused me to pause on an upgrade thats for sure. perhaps this might offer an ideal alternative, especially if it is the oil that is the cuplrit?
one issue with K&N though is the variables surrounding the oil itself if indeed this is the source for the dreaded CEL. is it an intrinsic fault, a user issue or a issue created through environmental circumstances. its impossible to say without a great deal of research. sadly its not something i am inclined to try and get to the bottom of, a category i feel most others fall into also. its easier just to bypass the product for me atleast, YMMV
anyways, id be interested to hear of anyone running this combination as suggested by palma to see how it works.
i may have misread palmas post but he was suggesting using the K&N CAI but crucially replacing the filter with an oil free high flow alternative from another supplier. this actually sounds like a positive idea to me. the K&N certainly has enough of a worry to it that its caused me to pause on an upgrade thats for sure. perhaps this might offer an ideal alternative, especially if it is the oil that is the cuplrit?
one issue with K&N though is the variables surrounding the oil itself if indeed this is the source for the dreaded CEL. is it an intrinsic fault, a user issue or a issue created through environmental circumstances. its impossible to say without a great deal of research. sadly its not something i am inclined to try and get to the bottom of, a category i feel most others fall into also. its easier just to bypass the product for me atleast, YMMV
anyways, id be interested to hear of anyone running this combination as suggested by palma to see how it works.
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Joined: Oct 2007
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From: Hamburg / Germany
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Hi
iam using a K&N CAI on my 2001 996 for now over one year. Had No problems yet with my MAF. I ordered this AEM filter today and i will install it when it comes to me. Does it fit pretty nice instead of the original K&N Filter ??
Palma: can you post some pics of your engine with that AEM Filter instead of the original one ??
Greetings from Hamburg-city
Z
iam using a K&N CAI on my 2001 996 for now over one year. Had No problems yet with my MAF. I ordered this AEM filter today and i will install it when it comes to me. Does it fit pretty nice instead of the original K&N Filter ??
Palma: can you post some pics of your engine with that AEM Filter instead of the original one ??
Greetings from Hamburg-city
Z
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From: Winnipeg, MB
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I'm gonna try their powerflow intake w/ K+N filter and see if that fits the bill.
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Before the Grand Am Cup series switched to 997's, almost every 996 competitor used the Evo intake. I can't think of a better way to choose than to see what intakes work on the track.
Plus, most of the other intake designs out today look like copies of the early or present EVO's. I guess imitation is the sincerest form of flattery
Plus, most of the other intake designs out today look like copies of the early or present EVO's. I guess imitation is the sincerest form of flattery