EVO or K&N Intake? buying 1 today, which to order?
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Joined: Jun 2009
Posts: 587
From: New York
Rep Power: 59
I've installed Carbonio last week and it had a noname filter on it. Do you think I should change the filter with a same size brand one?
Cheers!
Cheers!
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Joined: May 2010
Posts: 786
From: SF Bay Area, CA
Rep Power: 53
The only aftermarket filter I would consider is a multi-layer foam element (such as something from ITG). No cotton gauze media as per K&N, etc; especially on a P-car, as they are notorious for allowing too much small-micron particulate matter into your engine, which causes premature wear. Consistently high-silica reading oil samples from users using the cotton gauze media bears this out quite plainly.
Though I'm all for (sensible) hi-flow, I'm also for protecting my engine. One of the best media forms that has the best balance of filtration and flow is the humble Delco paper media. I can't imagine Porsche's source to be any worse for their OEM paper elements. Throw it out and get a new one. No big deal.
For me, what little gains if any you obtain with these cotton aftermarket filters is way eclipsed by the damage they do to your engine through inadequate filtration over time. The racers who use these cotton-jobber things are on a track in a fairly controlled environment (not running in the various elements we street drvers face daily), and they are rebuilding engines all the time, so this is a bit less of an issue for them. I want my street engine to last for many, many miles. Treat you gear right, and it will reward you.
This is my opinion. YMMV.
Caveat Emptor.
Though I'm all for (sensible) hi-flow, I'm also for protecting my engine. One of the best media forms that has the best balance of filtration and flow is the humble Delco paper media. I can't imagine Porsche's source to be any worse for their OEM paper elements. Throw it out and get a new one. No big deal.
For me, what little gains if any you obtain with these cotton aftermarket filters is way eclipsed by the damage they do to your engine through inadequate filtration over time. The racers who use these cotton-jobber things are on a track in a fairly controlled environment (not running in the various elements we street drvers face daily), and they are rebuilding engines all the time, so this is a bit less of an issue for them. I want my street engine to last for many, many miles. Treat you gear right, and it will reward you.
This is my opinion. YMMV.
Caveat Emptor.
Last edited by 1BlinkGone; Dec 11, 2010 at 03:44 PM.
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Joined: Aug 2006
Posts: 328
From: Tennessee
Rep Power: 53
While this is certainly true in theory, have you ever seen an engine fail or become seriously damaged as a result of the lower filtering efficiency of such filters? I appreciate this point as it is often brought out in these discussions but for the most part it is purely academic. The small amount of extra grim let in is a trade off for the possible power increase and the certain sound benefit of such an intake/filter. Just imo.
The only aftermarket filter I would consider is a multi-layer foam element (such as something from ITG). No cotton gauze media as per K&N, etc; especially on a P-car, as they are notorious for allowing too much small-micron particulate matter into your engine, which causes premature wear. Consistently high-silica reading oil samples from users using the cotton gauze media bears this out quite plainly.
Though I'm all for (sensible) hi-flow, I'm also for protecting my engine. One of the best media forms that has the best balance of filtration and flow is the humble Delco paper media. I can't imagine Porsche's source to be any worse for their OEM paper elements. Throw it out and get a new one. No big deal.
For me, what little gains if any you obtain with these cotton aftermarket filters is way eclipsed by the damage they do to your engine through inadequate filtration over time. The racers who use these cotton-jobber things are on a track in a fairly controlled environment (not running in the various elements we street drvers face daily), and they are rebuilding engines all the time, so this is a bit less of an issue for them. I want my street engine to last for many, many miles. Treat you gear right, and it will reward you.
This is my opinion. YMMV.
Caveat Emptor.
Though I'm all for (sensible) hi-flow, I'm also for protecting my engine. One of the best media forms that has the best balance of filtration and flow is the humble Delco paper media. I can't imagine Porsche's source to be any worse for their OEM paper elements. Throw it out and get a new one. No big deal.
For me, what little gains if any you obtain with these cotton aftermarket filters is way eclipsed by the damage they do to your engine through inadequate filtration over time. The racers who use these cotton-jobber things are on a track in a fairly controlled environment (not running in the various elements we street drvers face daily), and they are rebuilding engines all the time, so this is a bit less of an issue for them. I want my street engine to last for many, many miles. Treat you gear right, and it will reward you.
This is my opinion. YMMV.
Caveat Emptor.
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Joined: Dec 2009
Posts: 134
From: Longview, Texas
Rep Power: 32
Follow up on mileage issue post K&N:
These number are as reported by the car computer not yet manually verified.
Back to normal on the highway, perhaps slightly higher at 24-24.5mpg. Usual for me is 23-24mpg. Probably not statistically significant.
Mileage on the track was lower at 12.7mpg. My previous track days were 15-16.
As for power gains- maybe very slight. My top speed was 1-2mph faster on the end of a 2000ft strait. This could just be due to better exit speed from the corner. This was my 4th time on this track and my lap times were 4 seconds quicker than last time.
The exhaust note is more melodious, though.
These number are as reported by the car computer not yet manually verified.
Back to normal on the highway, perhaps slightly higher at 24-24.5mpg. Usual for me is 23-24mpg. Probably not statistically significant.
Mileage on the track was lower at 12.7mpg. My previous track days were 15-16.
As for power gains- maybe very slight. My top speed was 1-2mph faster on the end of a 2000ft strait. This could just be due to better exit speed from the corner. This was my 4th time on this track and my lap times were 4 seconds quicker than last time.
The exhaust note is more melodious, though.
.[/quote]
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