Swiss cheesing stock airbox - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 03-16-2008
DillonT's Avatar
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Swiss cheesing stock airbox

Hey,
i was going to buy a roush cai but i cant find one (if someone can find one for cheap, PLEASE link me)
i want to swiss cheese my airbox. im looking for some pointers and maybe some pics if anyone has them. i allready took the snorkel thing out and im getting a dual exhaust w/ in the next week. i have a 3.0
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Old 03-16-2008
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Old 03-17-2008
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I love my "swiss cheesed" box.

The sound is so sick.

Don't swiss cheese it, just cut a hole on the fender/front side of the box.

Drop in a k&n
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Old 03-17-2008
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Swiss cheesing it is really good for offroading if you hit water a lot.

If you go to my cardomain site, you can see movies of my truck hitting water 3 feet deep or so with no hydrolock. If you swiss cheese it on all sides from the bottom to just below the filter you then need water to rise on all sides to the bottom of the filter before you seriously ingest any water.

The proof is in the last several years of offroading at Wharton: people have gotten hydrolocked going through relatively shallow puddles, but I've slammed through very deep ones and been fine.

The downside is as mentioned above by Steven who has you doing it on only 2 sides: I get hotter air into my intake which can hurt performance. I make the trade willingly to be able to ford without as much worry.

But I still worry, so I'll be building a snorkel, lol.

I used a 1" flat "spade bit" like you use for boring wood. It makes short work of the plastic the air box is made of.
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Old 03-17-2008
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^^^ this is true.

i cut my box and wedn. night i went through a mud hole with alot of water on top and ended up getting stuck because as soon as i hit it water it flooded the box and killed my filter. luckly no hydro-lock but i had to get a new filter before i could get pulled out.

heres some pics.
https://www.ranger-forums.com/forum2...ad.php?t=60500
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Old 03-17-2008
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That's a good price for that CAI.

I got my MAC CAI off eBay for around $30 w/ shipping. It came with the cone filter and SS adapter/frame.
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Old 03-17-2008
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i dont offroad, so i should be fine. i might just dremel the whole fron of the box off.
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Old 03-17-2008
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I used a 3" hole saw (its what I had) to drill 3 holes across the front of the box, then drimmle trimes the top and bottom edges smooth. looks like this (__). Works great and sounds sick!
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