ZONE ZERO
Active member
This item was in the most recent issue of Land Rover Owner:
My immediate response: Wow! That's a lot of sand in the cyclonic filter that the regular air filter doesn't have to deal with.
I see a lot of snorkel products for Wranglers, but very few offer a cyclonic prefilter. I guess there aren't too many places in the U.S. where a cyclonic prefilter would be truly useful, but every time I get off an Easter Jeep Safari trail at Moab I open the windows and turn the HVAC blower on high as soon as I get on the highway to blow the dust out of the HVAC system, and I usually change the air filter after I get home from the trip, so places like Moab probably would be a good place for a prefilter.
I don't like that pretty much all of the snorkel products on the market require that you cut holes in the Jeep sheet metal, so I did some work on a prefilter/snorkel idea for the TJ a few years ago that would not require cutting any of the external sheet metal - I created a mold for a cowl panel that included a provision for mounting a cyclonic prefilter. The new fiberglass panel compared to the stock panel:
Testing it on my pickup:
The air intake gets routed through the firewall and there's ductwork integrated into the bottom of the new cowl panel to channel the air through the firewall. It worked very well, but since I don't drive my Jeeps into dusty areas like Moab more than once a year I didn't permanently install that panel and a prefilter on either of my '06's.
About a half dozen of the cowl panels escaped into the wild, two years ago a forum friend borrowed the molds and had a bunch made for himself and a few friends but other than that I haven't done anything else with the molds.
ive run pre cleaners or cyclones on all my snorkels on my jeeps, land rovers and Toyotas in New England and I can say with confidence that they do work well and keep so much debris and water out of the air box. I empty it every month and it’s amazing how much they catch. I have yet to change the air filter it’s still white.