I'm thinking of a K&N air filter but I've heard that they can be pretty bad for your engine. The reasoning behind this is that they do generate better flow and increased power, but by doing that, letting more stuff through, it can be harmful to the engine. Anyone else ever heard this?
Never heard it, but I had a K&N in my car for a while and didn't notice any power increase or decrease so I took it back. Im going to order a Perrin Short ram sooner or later so I figured why have an extra 50 bucks on my credit card that I will eventually throw away.
Most people say the oil will mess up the sensor but don't worry about it. K&N filters are nice and are power proven. You can also get a Perrin panel filter if you're worried.
I have a K and N air filter on all of my cars. You do not have to worry about the K and N having better flow while compromising filteration. Reason I say this is that the K&N drop in filters are designed for street use mostly with the occasional trip to the track or dragstrip. The only time you may have to worry about that is if you get filters that are designed for Race Only Applications. The reason is that the people who design these filters assume that after you race using these Race Only Filters you break apart the engine to inspect it for any possible problems before racing it again.
And the oil will not mess up the sensor. Its not like the filter is coated and oozing oil out of the filter. Only problem with K&N Filters are that they are a tight fit into the filter box, but they do fit in and you are able to latch the air filter box shut. Regardless of air intake applications on a 4 or 8 cylinder, you are not going to feel a dramatic difference. Air Intakes/Hi-flow filters will show their performance value as you build the car up, and then you will only see the difference when running at hi rpms. If you have a full performance exhaust and you bolt on the air intake system or hi-flow air filter, then you will be able to maybe notice the difference in that it will change the exhaust tone slightly making it more throatier. I put the K&N Filter on my car at the same time that I took out the Air Intake Resonator (which was a pain to get the Resonator out of the wheel well) and my turbo spools faster, car runs slightly lower rpms, and of course I can hear the turbo spool now with the stock recirc valve.
my 05 came with a k&n drop in filter??? is it bad or does it matter i was going to upgrade to the cold air from them later...??? any feed back on what is the best intake system for an sti???
Sorry to hijack the thread, but I'm running a TurboXS shorty and have thought about going back to the stock airbox. I'm running Stage 4, what do you think would be better?
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256 WHP on Mustang dyno that measures Stockers at 167.
the best place to pull intake air is from the fender well... cooler and less turbulent... from under the engine bonnet (the stock ram scoop) is also very effective for cool air, but somewhat more turbulent than from in the fender well... however, pulling air from the fender well is a double edged sword, because a lot of water is thrown in there when driving in heavy rain and on wet roadways... this water will be sucked into your intake if you pull air direct from the fender well, whether it be with the stock intake box cut off at the fender well entry, or a CAI.... The shorty ram avoids the water effect from the fender well, but is pulling hotter air from the surrounding hot engine/pippes/turbo... I run the shorty, i leave the 2nd hole open in the fender, the shorty is butted up pretty close to that hole... and i cut the ram air scoop short to direct some cool air towards the shorty, and it can also get some cool air from the 2nd hole in the fender well... when raining or wet out (i rarely drive my car in the rain),,, but if i get stuck in it.... i plug that 2nd hole up with a little foam plug i made... Yes, even the shorty will suck up water coming into that fender well with the 2nd hole left open... the shorty is indeed in the the engine bay... it just proves that the shorty can get cool air from the fender well (and rain water too) if the hole is left uncovered... shorty is good, but is unfortunately going to pull some hot air from you engine block... The alternative is a rusted out cold air intake filter (after 3 months of rain exposure inside the fender well) that sucks up butt-loads of water from that location).... which is not a good thing, trust me on that one, i speak from bad experience...
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Only problem with K&N Filters are that they are a tight fit into the filter box, but they do fit in and you are able to latch the air filter box shut. Regardless of air intake applications on a 4 or 8 cylinder, you are not going to feel a dramatic difference. Air Intakes/Hi-flow filters will show their performance value as you build the car up, and then you will only see the difference when running at hi rpms. If you have a full performance exhaust and you bolt on the air intake system or hi-flow air filter, then you will be able to maybe notice the difference in that it will change the exhaust tone slightly making it more throatier. I put the K&N Filter on my car at the same time that I took out the Air Intake Resonator (which was a pain to get the Resonator out of the wheel well) and my turbo spools faster, car runs slightly lower rpms, and of course I can hear the turbo spool now with the stock recirc valve.
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