Re: Drilling holes in airbox -Reply

[Andrew Fletcher <FLETCHA@citec.qld.gov.au>]

** High Priority **

>>> Doug Miller <dmiller@iea.com> 5/March/1997 09:42am >>>
>>K&N premises is a bit bogus, less resistance less filtering (nothing for
>>free....)
>>Avi Meron

>engineered for your car... etc.  Less resistance of the same air mass 
> and velocity simply means less contact with filter media in my book,
> also. I'll stick with the factory stuff.  Someone made a good point in a
> earlier post about who has the life of your Audi in mind vs who has
> sales of their after market filters in mind.

Actually thats not completely correct. I looked into air flow etc. with
respect to air filters a couple of years ago. There are four categories of
filter;
(1) ones that filter well and flow poorly, 
(2) filter poorly and flow well, 
(3) filter poorly and flow poorly,
(4) and those that filter and flow well. 

Obviously the last category is best. I haven't looked at Audi filters
however K&N came up best on both filtering and flowing in independant
tests of after market filters by a long way. I have the flow/filter results at
home and can post them if someone is interested. Just because it flows
poorly it doesn't mean that it filters well as the figures demonstrate.

Fletch
'81 urQ 95K miles