madhat

Air box mod... Maybe $15 all together. Diesel power magazine said that the 'high performance air intake mods' were really not worth it, the HP and TQ only went up a few # on the dyno, so I did my own based on info from this website.
This may take a few posts.
First, I took the baffles out of the air path. Take the air tube off the air box, all the way down to the turbo. The big fat tube that is smooth houses the baffles. To take this apart, I used a flathead screwdriver to 'pop the top' off. Once I got in, I simply pulled the assembly out. I reassembled the tube using high heat 2-part epoxy. (AutoZone) I recommend getting this before you start the project! (Had to take wife's HEMI to the store.) I left the plastic piece in the bottom in the turbo tube, it was white, and looked like it 'directed' the air into the turbo. (In...Out...???) I went to Lowes and purchased a 4" 90 degree PVC elbow and a coupler for my 'cold air intake'. With my air box completely assembled in the truck, I climbed underneath the truck, worked the PVC in the gap between the turbo and the wheel well, stuck my hand in the pipe, and made a mark with a marker. Then I removed the air box, cut the hole with a jig saw, and put the pipe in WITHOUT SEALING IT to check the fit. I reinstalled the box, climbed under the truck, and put the PVC on/under the air box. Once I had the pipe where I wanted it, I marked the outside of the pipe and the box with the marker, so I would know where to glue it in at. I then removed the assembly, glued the pipe together with PVC cement and used some high heat silicone on the outside. I used a piece of regular screen over the end of the PVC to keep the leaves and other trash out. (Yes, I used duct tape,) Does it add HP? I dunno, but it makes me fell good!!! Remember, this is what I did to my truck, and I am not the biggest brain that you will ever meet. This was on a 04, so it may not apply. I'm going to add pic's of this project tomorrow am, because, apparently, my computer at home sucks, and it takes forever to upload photos.
Feel free to ask ?'s, I'll be happy to respond.
-madhat

mysterystench

sounds good dude!
So basically you routed a tube from the airbox to underneath the truck to capture the 'cold-air'?

If so, I thought about doing this, just havent had the time. I have about six 1.25" holes in the bottom of my airbox, but I want to get some colder air in there so I think i'm going to make one of the center holes bigger and do what you described with either some rubber tubing or pvc.

Did you get a faster spool up by any chance?

1-2-3

I've been thinking about adding a BHAF, but all I've seen are setup to draw hot air from under the hood. The idea of making a clean, slick cold air pickup and smothing out the air path has me thinking of ways to accomplish this.

MikeyB

Madhat,
That's exactly how I modded my airbox. With the airbox mod, 5.5" aluminum tubing for the silencer tube replacement and the silencer ring removed my turbo will sing.
Great mod for less than $20.

MikeyB

wcjp

Here's my airbox upgrade with Home Depot parts.

http://www.cascade4x4s.com/pics/2006...rbox/index.htm

MikeyB

I like the storm drain cover idea. Do you remember the OD of the drain cover flange?

MikeyB

BigDave12768

Check out Good hoods ram air setup for the 3rd gens. Nice looking srt type hood and it is plummed over to give "ram air" Looks more like a nice cold air provider. The hood is like 500. So if you not into stylish looks than yours is perfect. But if you truck is a Big Boy toy then I would recomend the hood. It's on my list. I more mod (Banks pda) then the hood

wiskeyVI

Nice job Madhat!

madhat

Basically, yes. I'm trying to get pics to post, something funny is happening in computer land, and I'm not Bill Gates ... I did not really notice any difference on spool up, but I can hear my turbo a lot more. I have a drop in replacement filter on the way, and I am looking for somewhere that I can get a piece of metal tubing bent to fit my truck from the box to the turbo, but that is on the back burner for now. I've seen some pics from other members who ran a big rubber hose to hang down from the bottom of the airbox. I had even thought about getting a breather that came out the side of the fender, but I can already see myself ripping that off and sucking a tree into my turbo out in the woods somewhere.

madhat

That's pretty slick! Did you leave the fog light in? I've seen some DIY hood vents in diesel power mag that lets some of the hot air out, I was thinking about them.

1-2-3

Is your tube just a dryer vent hose? Any chance it will get sucked flat? I've heard of mods opening a hole in the bottom of the box, but that will be subject to dirt water from the tire area. I really like this idea shown.

Oilguy

I don't think it will get sucked flat but it is definately an eye sore being silver... could use a little flat black paint to hide it.

I would also put some window screen to catch the grass > leaves > bugs > and small cars that get suck into the hole or it will be a fun time getting the expensive filter cleaned out... I know... I did this on my old PSD and I had things in the air box you wouldn't believe... I pulled a bird out once! And lovebug season>>> you think getting them off you truck is fun... wait till you clean out your filter... the smell will make you want a Chuck bucket near by... AND then there is Junebug season.. and Grasshopper season...
I would rather clean a screen than the groves in the airfilter.

Oilguy

Lundee

How do you keep the rain out? Stupid ? Or what

redhauler

I was also wandering how many gallons of water per second a turbo can pull in when he goes thru high water or heavy rain

Lundee

glad I'm not the only one.