does it matter.. CAI question.
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Driver School Candidate
Joined: May 2012
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From: new york
does it matter.. CAI question.
OK so I'm planing on installing a CAI on my gs, I'm getting a really good deal for a K&N pipe from a friend but just the pipe, now the thing is can I put a injen filter on that pipe or does it have to be K&N, I don't want to put a K&N filter because I heard they're not that great. I know this is probably a noob question but any advice would help.
Driver
Joined: Mar 2011
Posts: 131
Likes: 1
From: pa
yeah you can put a injen filter, AEM filter any filter you wish that accepts the size of your pipe. Injen and k&n are both good choices, gotta keep them oiled and aem uses dryflow so you dont need to oil. Stay away from the eBay filters.
Thread Starter
Driver School Candidate
Joined: May 2012
Posts: 30
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From: new york
Driver
Joined: Mar 2011
Posts: 131
Likes: 1
From: pa
Thats a good choice, Theres pros and cons to each type but from stories on here and other car forums some people had problems with over oiling the filter and fouling the MAF sensor out prematurely. Let us know how you like the AEM filter then when you get it.
Instructor
Joined: Nov 2011
Posts: 1,224
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From: CA
As mentioned above, you can use any filter you want.
But be advised, some people have reported unusual driveability problems with CAI kits and/or check engine lights going off. It is typically attributed to changing the flow of air going past the MAF sensor wire or as mentioned above, getting oil on the sensor from the filter element.
Many people don't know, but the reason that a CAI kit shows a small gain in HP (typically 1-10hp somewhere on the RPM curve) is because they typically lean out the A/F ratio. By putting on a larger air filter and piping, you increase the cross sectional area of the air path. What this means is that for a given amount of air going into the engine, the cross sectional area is larger, so the air isn't moving past that MAF wire at the same rate as before (even though the volume is the same as before). The MAF thinks you are getting less air, so it compensates with less fuel, and the end result is a leaner A/F mix which shows a few extra HP. Typically the A/F doesn't change too significantly to be dangerous and the end result is an entire industry of CAI kits being marketed and sold as a "high performance" part, lol.
Since the stock air-box isn't a restriction on a stock application, you can get the same power gain (or more) with a tune. But tunes are expensive so many just resort to the CAI kit to lean out the A/F ratio.
But be advised, some people have reported unusual driveability problems with CAI kits and/or check engine lights going off. It is typically attributed to changing the flow of air going past the MAF sensor wire or as mentioned above, getting oil on the sensor from the filter element.
Many people don't know, but the reason that a CAI kit shows a small gain in HP (typically 1-10hp somewhere on the RPM curve) is because they typically lean out the A/F ratio. By putting on a larger air filter and piping, you increase the cross sectional area of the air path. What this means is that for a given amount of air going into the engine, the cross sectional area is larger, so the air isn't moving past that MAF wire at the same rate as before (even though the volume is the same as before). The MAF thinks you are getting less air, so it compensates with less fuel, and the end result is a leaner A/F mix which shows a few extra HP. Typically the A/F doesn't change too significantly to be dangerous and the end result is an entire industry of CAI kits being marketed and sold as a "high performance" part, lol.
Since the stock air-box isn't a restriction on a stock application, you can get the same power gain (or more) with a tune. But tunes are expensive so many just resort to the CAI kit to lean out the A/F ratio.
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