Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 01-02-2020, 03:00 PM   #1
xelhan
Member
 
Join Date: Aug 2016
Location: Avesta, Sweden
Posts: 69
Default Air Filters


Interesting information regarding air filters
Attached Files
File Type: pdf Filter Performance 2.pdf (441.3 KB, 50 views)
xelhan is offline   Reply With Quote
Old 01-02-2020, 04:00 PM   #2
ford38v8
Senior Member
 
ford38v8's Avatar
 
Join Date: Jul 2011
Location: SF Bay Area
Posts: 5,183
Default Re: Air Filters

Being of simple mind incapable of fully understanding all test methods and data, the results of such data presented being so unquestionably in favor of one over all others in every test has me thinking how many tests were omitted for reason of contrary expectation?
__________________
Alan
ford38v8 is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 01-02-2020, 04:54 PM   #3
JSeery
Senior Member
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 14,051
Default Re: Air Filters

The bottom line of the testing is what you would expect the denser the filter medium the more dirt it traps and the more resistance there is to air flow, the less dense the medium the less dirt that is trapped and the higher the flow rate. Who would have guessed!
JSeery is offline   Reply With Quote
Old 01-02-2020, 05:17 PM   #4
Kurt in NJ
Senior Member
 
Kurt in NJ's Avatar
 
Join Date: May 2010
Location: on the Littlefield
Posts: 5,093
Default Re: Air Filters

The K&Nfilters don't stop much, I always cringe when it is called a upgrade to rip out the innerds of a oil bath and put in a k&n

Another filter to look at is the capture size of a full flow compared to a bypass oil filter--- and that many full flow filters run in bypass non filtering mode a lot more than you would expect

Last edited by Kurt in NJ; 01-02-2020 at 05:23 PM.
Kurt in NJ is online now   Reply With Quote
Old 01-02-2020, 05:25 PM   #5
tubman
Senior Member
 
tubman's Avatar
 
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 6,146
Default Re: Air Filters

Well, here's my real life experience. When I got the engine in my '67 Corvette rebuilt and installed, I got it to the state where it would run ALMOST perfectly. It had an occasional "stumble" when going down the road; not very often, but enough so it was annoying. In trying to track down the problem, my first suspect was a mismatched power valve. To check it out, I installed a temporary vacuum gauge, so I could see how the readings matched up with the actual power valve rating. To get the vacuum gauge hooked up, I had to run the car without an air cleaner. As soon as I did this, the stumble disappeared. To make a long story short, with a stock air cleaner I had an occasional stumble, while without one, the car ran perfect.

The first thing I did was buy a new top of the line filter (I think it was a WIX). That seemed to help a little, but did not eliminate the problem. My next attempt was to drop a bunch of money into a K&N filter. As soon as I installed it, the stumble became more prevalent, enough to cause driveability problems. Took the K&N off, and did a test drive with no filter, and it ran perfect; put either filter back on, and the "stumble" came back, mild with a stock filter, worse with the K&N.

All of this took a lot more time and effort that I am stating here, but I finally came to the conclusion that there was something restricting the airflow. The ultimate solution was to get a premium 14" air filter that was 4" high rather than the 3" that came stock (luckily, it fit under the hood). Stumble gone, 100%. I drove the car the last half of the summer with NO stumble.

I had been chronicling this on the H.A.M.B., and of course, I got all kinds of varying input. The one fact that came through load and clear was that nobody liked K&N filters; not one positive comment. Needless to say, I share the opinions of the first two responders to this thread.
tubman is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 12:38 AM.