Originally Posted By: JOD
To Jim's questions, it's a "Filter-Minder" brand grommet-type filter, and the range is 2-8.7 kPa. It moved, slightly, when I first installed it (like 2.1). Then, it never moved again. I put a vacuum pump on it when I changed the air filter and it correlates well to the gauge on my Mityvac.
Excellent way to check the gauge and the way I do it too. I presume you use the WOT method to set the baseline? A grandma drive may never move the gauge ( : < ).
Originally Posted By: JOD
"Different than what my daddy taught me?". Well, as a kid I was instructed to (get ready to cringe) pull out the filter and bang it on the ground to "get out the dirt". Widman's posts on that subject still linger in my head!
You and me both! The air filters on HD equipment can tolerate that kind of treatment, but not many passenger car/light truck filters.
Originally Posted By: JOD
" I think engines like clean air better than "fresh air",
And that's the BITOG quote of the day as far as I'm concerned.
Lack of airflow from a partly loaded filter may cost you a few hp at some point at WOT. WOT is not a very frequent condition for those of us who aren't racing, running moonshine or chasing bad guys so it doesn't benefit you much. DIrty air hurts you all the time, whether idling or at WOT.