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FJR Motorcycle Forums
Technical & Mechanical Problems
Wicked Webby Air Box Mod Warning
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<blockquote data-quote="Karl" data-source="post: 617278" data-attributes="member: 14297"><p>Never liked the idea of the "furnace filter" mod. Just not enough downstream support with all the potential vacuum when/if the panels became partially blocked/dirty. I did the partial by just using a 1 1/4" hole saw on the right side of the airbox for the upper and lower radius of the I.D. , then trim the middle nubs with a dremel. Cut back the stock intake snorkel tube that fits into the stock filter to about 1/2" length and kept the external slot snorkel off.</p><p></p><p>Did a dyno yesterday and gained 4HP at peak and 5 pounds torque right in the middle of the RPM range. Lost power or torque nowhere. Cheapest (cost $0.00) and fastest (30 minute mod) power gain I have ever seen. Don't believe it? Call Richard at Santa Cruz Cycle Imports. He ran the dyno and will attest to the fact. (831) 479-3667</p><p></p><p>I just dont see the need to go all the way and cut out giant holes in the airbox. I mean at 9500 redline and 100% VE, the feej can only pump 230 CFM anyway. Two oval holes the size of the ID of the OEM filter is more than enough area to flow up to that level.</p></blockquote><p></p>
[QUOTE="Karl, post: 617278, member: 14297"] Never liked the idea of the "furnace filter" mod. Just not enough downstream support with all the potential vacuum when/if the panels became partially blocked/dirty. I did the partial by just using a 1 1/4" hole saw on the right side of the airbox for the upper and lower radius of the I.D. , then trim the middle nubs with a dremel. Cut back the stock intake snorkel tube that fits into the stock filter to about 1/2" length and kept the external slot snorkel off. Did a dyno yesterday and gained 4HP at peak and 5 pounds torque right in the middle of the RPM range. Lost power or torque nowhere. Cheapest (cost $0.00) and fastest (30 minute mod) power gain I have ever seen. Don't believe it? Call Richard at Santa Cruz Cycle Imports. He ran the dyno and will attest to the fact. (831) 479-3667 I just dont see the need to go all the way and cut out giant holes in the airbox. I mean at 9500 redline and 100% VE, the feej can only pump 230 CFM anyway. Two oval holes the size of the ID of the OEM filter is more than enough area to flow up to that level. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Wicked Webby Air Box Mod Warning
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