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FJR Motorcycle Forums
Technical & Mechanical Problems
Dale Walker Holeshot Full System
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<blockquote data-quote="SkooterG" data-source="post: 232039" data-attributes="member: 118"><p>My $.05 worth.........</p><p></p><p>Adding a K&N air filter does nothing to change the flow characteristics of the system. I was told this by a Dynojet Tech who had dyno'd many a modern bike with and without the K&N. He said that in almost all modern bikes, the airbox is engineered to a degree that the air filter no longer handicaps air flow.</p><p></p><p>Just adding slip-ons to the FJR doesn't change airflow characteristics all that much, if at all. With the catalytic converters in the system, THEY are where the restrictions are. So running stock mapping, or a "slip-on" only map will be fine, if not ideal.</p><p></p><p>Changing the header to an aftermarket cat-less system like the Muzzy or Holeshot <em>DOES</em> makes a significant change in airflow characteristics that <em>WILL</em> require a map designed for the system.</p><p></p><p>So, I personally wouldn't worry about the K&N vs. stock air filter too much. But I would most definitely run a map that has been designed for a cat-less system. In your case, you want to run Dale's map, a map another FJR owner with Dales header had custom made, or perhaps the map for the Muzzy full system, but that would be a big stretch. I personally would NOT run a slip-on only map with the full system.</p></blockquote><p></p>
[QUOTE="SkooterG, post: 232039, member: 118"] My $.05 worth......... Adding a K&N air filter does nothing to change the flow characteristics of the system. I was told this by a Dynojet Tech who had dyno'd many a modern bike with and without the K&N. He said that in almost all modern bikes, the airbox is engineered to a degree that the air filter no longer handicaps air flow. Just adding slip-ons to the FJR doesn't change airflow characteristics all that much, if at all. With the catalytic converters in the system, THEY are where the restrictions are. So running stock mapping, or a "slip-on" only map will be fine, if not ideal. Changing the header to an aftermarket cat-less system like the Muzzy or Holeshot [I]DOES[/I] makes a significant change in airflow characteristics that [I]WILL[/I] require a map designed for the system. So, I personally wouldn't worry about the K&N vs. stock air filter too much. But I would most definitely run a map that has been designed for a cat-less system. In your case, you want to run Dale's map, a map another FJR owner with Dales header had custom made, or perhaps the map for the Muzzy full system, but that would be a big stretch. I personally would NOT run a slip-on only map with the full system. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Dale Walker Holeshot Full System
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