I don't think Vizard's book 'specifically tried the K&N's with the integral
'stub' stacks, but only shows statistics for flow on varios tested stacks, and
teh K&N filter separately. All his teating shows is that each individually does
improve flow by quite a bit.
His testing shows that a shorter stub stack improves flow better a higher RPM,
whereas, a longer stack improves at lower RPM's.
For me personally, I don't know if there was a performance difference on my
car,
since I have only run it with the set-up I have.
- Bryan
BTW - This is all in Vizard's book, it really is an excellent reference. If
you
don't have a copy, it's probably one of the best investments you can make, if
you plan to modify the a-series in any way for performance.
>Mime-Version: 1.0
>X-Sender: jboatri@pop3.service.emory.edu
>To: Bryan Vandiver <Bryan.Vandiver@eng.sun.com>
>Subject: Re: 1 1/4 SUs, Ram Pipes, and K&N Filters
>Cc: spridgets@autox.team.net
>
>So we're waiting with baited breath: Did the K&Ns improve performance??
>
>At 9:47 AM -0700 6/8/00, Bryan Vandiver wrote:
>>I believe the ones they did make had very shallow or 'stubby' ram pipes built
>>into the filter housing, so these were probably not 'optimal' anyway.
>>According to Vizard's, you should prbably fit the longest ram pipes that will
>>fit in the filter housing. If I remember correctly, I think you should have at
>>least 1" clearance between the end of the ram pipe, and the filter housing.
>>I 'custom' made up my K&N filter assembly, by calling them direct,
>>and ordering
>>the tallest filter element that would fit under my 'bugeye' hood,
>>for a dellorto
>>sidedraft (virtually the same as a weber DCOE). I them orderd the tallest ram
>>pipes I could find that would still give at least 1" clearance.
>>
>>BTW - All the K&N filters are generically shaped in several different
>>configurations, with only the hight of the filter changing. The thing that
>>changes is the 'mounting' for the various filter housings, to accomodate
>>different carbs
>>
>>Bryan Vandiver (59-bugeye)
>>San Jose, CA
>
>
>_____________________________________________________________
>Jeffrey H. Boatright, PhD
>Assistant Professor, Emory Eye Center, Atlanta, GA, USA
>Senior Editor, Molecular Vision, http://www.molvis.org/molvis
>mailto:jboatri@emory.edu
>
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