Disappointing email from Roush

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Ruger

FRF Addict
Joined
May 16, 2011
Posts
9,194
Reaction score
8,263
Location
Northern Nevada
Here in the south, the AIRAID prefilter sock also helps dramatically with the heavy pollen we get in the spring. That sock keeps the yellow goo off the filter like a champ!
 

KaiserM715

Kaiser Söze
Joined
Aug 5, 2010
Posts
8,571
Reaction score
3,116
Location
Houston, TX
they would more than likely recommend using their CAI lid for any heavy off-roading. look, i'm not defending Roush but I'm just speaking generally that "open-filter" cold air intakes are not ideal, or recommended in off-road situations where the risk of dirt, dust, mud or water ingestion is possible. am i wrong?

Nope. Nothing will filter dirt as well as the stock paper element (well, except for something like the Donaldson PowerCore...) Take a look at the pic below and look at all of the dust in the tube. VVVV


7748d1334346147t-hennessey-tune-91-intake-back-stock-imag0539.jpg

My throttle body- Hennessy intake with K&N after 9k miles. (Swapped the filter with a new one once during that 9k miles as well)
 

kawie95

Full Access Member
Joined
Dec 13, 2011
Posts
847
Reaction score
134
Location
Manhattan Beach, CA
Nope. Nothing will filter dirt as well as the stock paper element (well, except for something like the Donaldson PowerCore...) Take a look at the pic below and look at all of the dust in the tube. VVVV

Here was Henesseys response to my intake dust,
The filters come pre-oiled. The dust that you are seeing is dust that is passing through the small openings of the filter. That dust is too fine to damage the engine. Granted if it builds up you may have issues but you must be in highly dusty conditions. When that dust gets in the combustion chamber that should burn off but if you are going through that dirty of conditions you may want to frequently clean and re-oil your filter. If you go with the AFE and use the dry filter I would check the filter after each day of running in those conditions. The K&N filters are great but there comes a point when they cannot filter any more. I hope this makes sense.
 

WarSurfer

FRF Addict
Joined
Mar 11, 2011
Posts
1,100
Reaction score
879
Location
DC
In real off road racing they use two, sometimes three filters. For carbed setups with the large round filter they use a dry filter with an oil soaked 'sponge' filter over the outside. Sometimes that setup will be in a split seam filter box where the hood seals the box when closed, save for the rear facing inlet.

For fuel injected tube type intakes, not only do folks use something like a K&N with a pre filter sock, they will also build a filter box where one or more sides are also filter elements and the tube intake draws air from inside the filter box, pre filter sock and K&N type - at least that's what most folks were doing in the desert when I lived out there - years ago - and the filter box is in the cab or the bed next to the cab.

The military runs 'filter less' filters in some applications where centrifugal force is used to sling particles out of the intake stream. The intakes look like conch shells and have strategically placed scoops and seams - works pretty good in situations where constantly changing a filter element isn't an option.

We have a decent amount of room under the hood, I'd be willing to bet you could make your own filter box for less than 100 bucks, including the cost of two flat filter elements.
 
Last edited:

whisler151

FRF Addict
Joined
Apr 13, 2011
Posts
1,228
Reaction score
262
Location
Dallas, TX
I can attest to the reason they say that. My Roush filter is jacked up after the TX Raptor Run.

I think i'll keep an eye out for an AFE intake with a lid.
 
Top