<VV> FW: [GMCMH-EFI] GM 454 2" Throttle Body Sources

[Bob Dunahugh]

 This maybe of interest.  I've heard this before elsewhere. This is from a sub group of the GMC Motor Home group list that I read daily. I'm converting my GMC over to Throttle Body, or Port. Up in the air right now.   Bob Dunahugh  ( Don't receive VV. So contact direct. )

Date: Tue, 29 Jan 2013 14:48
To: gmcmh-efi at googlegroups.com
Subject: Re: [GMCMH-EFI] GM 454 2" Throttle Body Sources

wow, I've never heard that!  They must have a good marketing campaign because I always figured they were better.  Guess I'll be putting that regular paper filter on after all.
thanks
Karen

On Monday, January 28, 2013 6:03:40 PM UTC-8, Gordon wrote:
  
    
  
  
    Karen,

      I would caution you on the K&N filter.  Many years ago, I had
      a study on K&N filters done by a mining company who had 1000
      vehicles from head office cars which never went near the mine, to
      200T trucks in the pits.  The engineers took oil samples of all
      vehicles before switching 500 of them to K&N and for 1 year
      after.  The results were very conclusive that the K&N filters
      passed larger particles and a greater volume of dirt than the
      standard paper element.  For a few dollars, oil sample kits are
      available from Air Craft Spruce and others.  The only K&N
      filters I have personally tested were on Goldwing Motorcycles and
      when, by oil samples I proved theY increased crud in the oil to my
      friends , we all took them off.   You can find more opinions on
      the NET.  IIRC Emery points out, if you are meticulous about
      cleaning and oil them just right, they provide adequate
      protection.  Most small aircraft engines use a similar style
      filter, but the air is a lot cleaner where they spend most of
      their time and they are serviced every 50 hours.  

      Gordon