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SVTPerformance 2012 GT : K&N Replacement Filter Test
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<blockquote data-quote="mustangc" data-source="post: 11929209" data-attributes="member: 87570"><p>Back in the Fox days, drop-in K&N filters proved to flow better and make more power than the factory paper element even on otherwise stock cars. I think the correct response to SVTP's test is to accept the data for what it is: evidence that no power was gained on a Coyote 5.0 in this configuration. In fact, the dyno suggests a measureable LOSS in power.</p><p></p><p>The most important step to take now is to understand "why". By finding the root cause for the result, we can apply that principle to other situations. I'm not making excuses or debating the results, I'm just wondering what scientific phenomenon caused the power loss. Is the K&N suddenly more restrictive? If not, what else could it be? </p><p></p><p>As Sid mentioned, removing the filter altogether would have reduced power due to turbulence in the air stream. I also remember seeing tests where the the intake screen was removed on some of the modern cars. It should have decreased the flow restriction, but the vehicle actually lost power. Turbulence was also the likely culprit explained in that test. I wonder if the K&N's characteristics are causing the same phenomenon?</p><p></p><p style="margin-left: 20px">On a side note: This type of article is what used to make MM&FF and 5.0&SF such great magazines: back-to-back dyno tests on real world aftermarket parts. The back-to-back comparison's of multiple brands of the same products were even more helpful. I don't know why this type of high-value journalism dried up over the past years, but I'm glad to see SVTP doing what it can to bring it back. This is what made the Mustang hobby so fun for me. I used to archive every one of these tests. Now, most of my mags get a quick flip through then get relegated to the bottom of the bookcase.</p><p></p><p>Great Job, SID!</p></blockquote><p></p>
[QUOTE="mustangc, post: 11929209, member: 87570"] Back in the Fox days, drop-in K&N filters proved to flow better and make more power than the factory paper element even on otherwise stock cars. I think the correct response to SVTP's test is to accept the data for what it is: evidence that no power was gained on a Coyote 5.0 in this configuration. In fact, the dyno suggests a measureable LOSS in power. The most important step to take now is to understand "why". By finding the root cause for the result, we can apply that principle to other situations. I'm not making excuses or debating the results, I'm just wondering what scientific phenomenon caused the power loss. Is the K&N suddenly more restrictive? If not, what else could it be? As Sid mentioned, removing the filter altogether would have reduced power due to turbulence in the air stream. I also remember seeing tests where the the intake screen was removed on some of the modern cars. It should have decreased the flow restriction, but the vehicle actually lost power. Turbulence was also the likely culprit explained in that test. I wonder if the K&N's characteristics are causing the same phenomenon? [INDENT]On a side note: This type of article is what used to make MM&FF and 5.0&SF such great magazines: back-to-back dyno tests on real world aftermarket parts. The back-to-back comparison's of multiple brands of the same products were even more helpful. I don't know why this type of high-value journalism dried up over the past years, but I'm glad to see SVTP doing what it can to bring it back. This is what made the Mustang hobby so fun for me. I used to archive every one of these tests. Now, most of my mags get a quick flip through then get relegated to the bottom of the bookcase.[/INDENT] Great Job, SID! [/QUOTE]
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