[V8] Mann, oh Mann

[Jeremy Ward]

Good stuff...

-----Original Message-----
From: AUDI-NW-owner at u.washington.edu
[mailto:AUDI-NW-owner at u.washington.edu] On Behalf Of Adam Dieckerhoff
Sent: Thursday, December 09, 2004 2:50 PM
To: northwest audi enthusiasts
Subject: A compelling argument for keeping your stock air filter

http://home.usadatanet.net/~jbplock/ISO5011/SPICER.htm 

For those not interested in taking the time to read the whole article, 
here's the best part:

"The AC Delco filter test ran for 60 minutes before exceeding the 
restriction limit while the AMSOIL and K&N tests each ran for only 20 
minutes before reaching max restriction. In 60 minutes the AC Filter 
accumulated 574gms of dirt and passed only 0.4gms. After only 20 minutes
the 
K&N had accumulated 221gms of dirt but passed 6.0gms. Compared to the
AC, 
the K&N  "plugged up" 3 times faster, passed 15 times more dirt and
captured 
39% less dirt. See the data tables for a complete summary of these 
comparisons."

The only test perameter where the stock air fliter performed worse than
the 
aftermarket was Inital Air Restriction.  The stock pulled 6.5 inH2O
(inches 
of water vacuum), the K&N 4.25.  But consider this:  it takes 30 inH20
to 
equal one inHg (inch of Mercury) and it takes 30 inHg to equal one 
Atmosphere (about 15 psi).  So you can see the difference between these
two 
filters is miniscule, especially when you factor in the rest of the
intake 
systems and what restrictions it contributes.  As an example the entire 
intake from airbox snorkel to the turbo on an Audi S4/S6 is 26 inH20, 22
of 
those inches is caused by the MAF.  The stock air filter's contribution
to 
the total restriction was unmeasurable.

I'll keep my stock air fliter, thankyouverymuch!



TTFN,
Adam Dieckerhoff
Head Tech, Achtuning LLC
Redmond, WA.
adam at achtuning.com

52 window limo
'05 Jetta TDI
'86 5kcstq
'93 S4 (RIP)