Originally posted by GJarrett
K&N Filter and Drilled Airbox:
(or, "Swiss Cheese and a 12 Gauge")
Around this time many of us were installing K&N air filters and drilling holes in our airboxes to improve airflow into our intakes. I was deluged with requests for exactly how to do it and where are some pictures. It made no difference that a simple search would yield a couple hundred hits to learn how to do it; I was still deluged with dozens of emails about it. No amount of assurance seemed to convince people that there was no "best" way or superior hole size or location, etc. I finally decided, tongue firmly in cheek, to provide a definitive answer and end once and for all those continual questions.
http://www.explorerforum.com/forums/showthread.php?threadid=16092
The issue has been raised in subsequent months concerning whether the advantage to drilling the airbox is worth the trouble since the mod will suck hotter air into the intake via the engine bay and it would be better to ram cooler air in from the outside. My observation is that yes this mod seems to work better in winter with cooler months. During severe summer temps in the 100 degree range I seem to experience a little detonation that doesn't occur when it is cooler. However, it sounds really cool all the time (like a four barrel carb) so I don't care even if it is summertime, so there.
