Modifying the factory air box
11-23-2002, 10:29 PM
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Modifying the factory air box
I spoke briefly to TPilaske before he left on vacation. He was telling me about a way to increase air into the stock air box by first removing it from the fender, then pulling a piece of plastic from somewhere around where the box sat. Then replacing the box. Sound familiar to anybody? Got some spare time tomorrow between doing leaves >
and installing the snow plow on the tractor. [undecided]
and installing the snow plow on the tractor. [undecided]
11-23-2002, 11:32 PM
#3
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Re:Modifying the factory air box
There is some ducting(?) between the stock airbox and the fender it is sitting on/next to.<br>Removing the ducting just makes for a slightly bigger hole to get colder, non-engine compartment air.<br>Will also increase the turbo noise if you are into that ;D.<br><br>There are also tales of people drilling 1inch(?) holes in the underside and sides of the stock box to get more air in.<br>(just make sure to drill below filter level 
)<br><br><br>phox
)<br><br><br>phox
11-24-2002, 10:15 AM
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Re:Modifying the factory air box
I removed the plastic piece that you are talking about, takes about 3 min. All I have notices is a little more turbo noise. I haven't done enough towing with or with out it to see if there is a difference. The one advantage is that it is free to try it, and if you don't like it put it back in.
11-24-2002, 11:26 AM
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Re:Modifying the factory air box
[quote author=Ryan link=board=4;threadid=7471;start=0#71798 date=1038154515]<br>I removed the plastic piece that you are talking about, takes about 3 min. All I have notices is a little more turbo noise. I haven't done enough towing with or with out it to see if there is a difference. The one advantage is that it is free to try it, and if you don't like it put it back in.<br>[/quote]<br><br>Good point Ryan 
11-24-2002, 11:33 AM
#7
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Re:Modifying the factory air box
Just a note of caution.
Some dealers are indicating the "Swiss-Cheezing the airbox" will affect your warranty.
I used a 1" hole saw and drilled holes on the underside and the side toward the fender, leaving the engine side untouched.
Still looks stock, but flows more air.(at least until I win the Scotty II)
Also too many holes will actually let hot under-hood engine heat be drawn into the turbo.
Some dealers are indicating the "Swiss-Cheezing the airbox" will affect your warranty.
I used a 1" hole saw and drilled holes on the underside and the side toward the fender, leaving the engine side untouched.
Still looks stock, but flows more air.(at least until I win the Scotty II)
Also too many holes will actually let hot under-hood engine heat be drawn into the turbo.
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11-24-2002, 12:40 PM
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Re:Modifying the factory air box
Commatoze,
This has been my inexpensive solution to lower EGT's and more fresh air flow into the turbo on 2 trucks now. It dramatically reduces EGT under a load. There are 2 90's; one on the front and one on the rear of the box. The back one is pointed straight down so less likely to intake moisture or water. In the summer I have a special preformed hose that attaches to the 90 next to the battery and is routed out behind the LF head light to suck in cool outside air. When the engine is idling you can feel the suction if you put your hand over the hose. It took allot of looking for the "perfect" hose but I have the part # if you want it. The 90's can be had at Loews or Home Depot, in the "pool" section
This has been my inexpensive solution to lower EGT's and more fresh air flow into the turbo on 2 trucks now. It dramatically reduces EGT under a load. There are 2 90's; one on the front and one on the rear of the box. The back one is pointed straight down so less likely to intake moisture or water. In the summer I have a special preformed hose that attaches to the 90 next to the battery and is routed out behind the LF head light to suck in cool outside air. When the engine is idling you can feel the suction if you put your hand over the hose. It took allot of looking for the "perfect" hose but I have the part # if you want it. The 90's can be had at Loews or Home Depot, in the "pool" section
11-24-2002, 02:04 PM
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Re:Modifying the factory air box
The first heavy pull with my Comp-equipped '02 sucked my filter-minder down 2/3 - the pic below shows what I did to mine - no more problems... As one guy above said, this MIGHT hurt yer warranty - but mine is dead anyway because of other mods.... AND, if I hafta choose between warranty and badly restricted air intake, well... ;D
11-25-2002, 06:33 PM
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Re:Modifying the factory air box
Well, the airbox inlet is actually lots more restricted than just looking at the box inlet would lead you to believe - the pic below shows a direct view out towards the fender - and while in this picture it LOOKS like it wide open all the way thru, it really isn't - what you see at the back is actually the CLOSED rear section of the "boot" that ducts air from the fender area into the airbox itself - the actual intake ports INTO the boot are pretty small - about the same size as the holes I drilled into my airbox, and there's only 2 of them, one on each side of the opening you see in the photo... You really NEED a bigger intake path!
11-25-2002, 09:19 PM
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Re:Modifying the factory air box
I never looked that close inside the hole. After looking at your photo. . . I am going to look at mine again and am thinking about cutting the back out of the rubber boot; if it's feasable.