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follow up on air filters 120-130

posted by  floyd_ramp on  Fri Mar 28 03:15 CST 2008
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last visit: Mon Sep 9 12:13 CST 2013
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So after all your advice, I think I'm going to go with the K&N filters. My question is, currently I've got a pair of the original paper filters on my SU-HS6s. When I bolt the K&Ns on there, am I going to have to adjust the carburettors in any way (because presumably that should increase the airflow a bit). Any thoughts?

Floyd R.








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    follow up on air filters 120-130

    uid 18886's pic
    posted by  sdewolfe on  Fri Mar 28 07:33 CST 2008
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    last visit: Mon Jan 31 05:56 CST 2011
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    No, there will be no difference in tuning at idle. But, a free flowing filter (or none at all) changes the pressure differential across the bridge of the carb at cruise speeds.

    Check out this page: http://www.teglerizer.com/mgstuff/a_stumble_at_cruise.htm

    You can read the whole thing if you want but the important passage is at the bottom of the page, "A Final Resolution".

    --
    Mr. Shannon DeWolfe -- (I've taken to using Mr. because my name tends to mislead folks on the WWW. I am a 52 year old fat man








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    follow up on air filters 120-130

    uid 15692's pic
    posted by  Caliwagon on  Fri Mar 28 06:14 CST 2008
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    last visit: Mon Aug 24 10:12 CST 2009
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    I suppose others may disagree, but I think you'll be fine. I certainly didn't change anything when I switched to the K&N's. If there is a difference in flow, it's probably only at high RPMs, and most people aren't tuning their SU's way up there. Furthermore, if you had to re-tune your carbs for K&N's, then I suppose you'd also have to re-tune your carbs every time you replaced a dirty paper filter with a fresh one, which I don't think anyone does.








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      follow up on air filters 120-130

      posted by  floyd_ramp on  Sat Mar 29 11:33 CST 2008
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      last visit: Mon Sep 9 12:13 CST 2013
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      Aha. That's a good point. I'm curious to see what the diff is between the paper filters and the K&N, what with all the crazed testimonials on their website ("My has 20 more horsepower!" etc, etc.)







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