Fabricate Air Intake?

[wcjp]

Does anyone here buy an aftermarket air filter and fabricate an airbox instead of buying off the shelf? I noticed on this website the airfilter alone was $79 for a 3rd Gen.

 

[JApol]

I got the NAPA BHAF and i have to make a new tq tube to make it fit. I'm going to talk to a muffle shop this week to see if i can get it to work before the fall brawl. If I can i will get measurements to post.

 

[Matt400]

If I can i will get measurements to post.

Do you think it would fit vertical like this? I had bought one but forgot the length before sending it back. I didn't like the fit but on these twins it might work out well.

 

[JApol]

I pulled out the airbox the other day to test fit and try to get an idea on how ti fit it in but it started raining and has been ever since I might have to make a bracket that supports the closed end of the filter. This thing is a behemoth!! I hope to have something by the end of hte week and maybe i will find some one at the brawl that has an idea or two. But i think the biggest trick will be getting the tube bent right.

 

[nickleinonen]

my take on home brew piping with a bhaf filter...

 

[4 wheelssmoking]

Maybe something like this #ad
https://www.turbodieselregister.com/user_gallery/sizeimage.php?&photoid=19008&width=2"> A uni filter with common big truck exaust pieces

 

[JCrockett]

I made a elbow with 4" exhaust pipe (See RR) I am still trying to figure out a way to build a heat sheild. The intake temp is directly related to the EGT. There is alot of hot air the BHAF inhales. My intake temp had been 130* and the air temp outside about 50*. So I need to fab a heat shield of some sort.

 

[JApol]

my take on home brew piping with a bhaf filter...

couple of questions

1. what did you use as elbows? sewer pipe?

2. what is covered by the gauze?

3. did you just leave the map sensor out in the open like it shows in the pics?

 

[p59404]

Try wraping the pipe with exhaust wrap, it will lower the temp to normal air temp, works great on my snowmobile exhaust.



Pat

 

[SRadke]

You could easily make your own pipe. Guys do it all teh time on their twin kits, myself included. I actually made two diffrent intake pipes for mine, one for a large high flow filter and another for a smaller PG7 filter with prefilter.



-Scott

 

[steved]

Another option:



Simply cut holes in the factory box, take the deflector out of the bottom elbow (convenient when you remove the siliencer ring), and add an highflow filter (I used an Amsoil Filter)... works great. I put about 20 1-inch holes in the sides of the factory box. This is the third truck I have done this with and it works good... total cost to me was the cost of the aftermarket filter. It even works for a "stock" filter... the airbox is really restrictive.



Gives the same effect without hunting a mounting point for the box/filter/hose or the MAF sensor.



Works good.



steved

 

[nickleinonen]

couple of questions

1. what did you use as elbows? sewer pipe?

2. what is covered by the gauze?

3. did you just leave the map sensor out in the open like it shows in the pics?

elbows are rubber intake elbows [i got them locally, but airflow systems inc sells them online]



there is a 4" short radius 90° exhaust elbow under the fiberglass heat wrap tape



i left out the IAT for about a year [but still attached to the wiring], but now it is in the piping, although i still need a little time to finish the adapter piece i am making, but for now it is in the piping like this.

[for me, it made zero difference to driveability as to where the iat sensor was located]

 

[Greg Boardman-RIP]

Hey guys,

I have some 90* and 45* fittings left over from DRC BHAF testing. Give me a call and I will sell them cheap to try to recoupe come R&D costs.

Greg DRC

 

[Van Blom]

I built mine copying Nicks design But just changed the lower elbow back to the stock elbow with the air guides in it. I Looked at the stock elbow and figured that if the white thing didn't do anything, cummins wouldn't put it in.

 

[rhorth]

I recently fabricated a fresh air intake based on the article in the latest issue of TDR using 4 in sewer pipe bolted to the bottom of the air box and down thru the fender well for a cost of less than $30 and am well pleased with the install. But now am wondering if I should be concerned with snow sucking up the tube and possibly pluging up the aFe drop in air filter since the elbow at the bottom of the tube is totally open? The article stated that rain would be no problem since it is placed about 1 in above the lower part and 2 in behind the front bumper. But what about Colorado snow storms?

 

[Buffalo]

I wonder if you could build a housing that connects to the bottom of the sewer pipe & wrap it with window screen. The worst case scenerio would clog the screen but, you still would have the stock opening to feed air to the turbo. I imagine the screen would break down the snowflakes so much that it would end up being water droplets.



Just a thought.



Joe F. (Buffalo)

 

[juicedcummins]

Snow will not be a bigger problem than it already is.

In a snowstorm 2 weeks ago I had my Airaid collapse from being plugged full of snow. A fellow CTD had his stock filter collapse about 20min before me on way to the same destination.

And yet another fellow CTD owner has an 04 that sucked the stock filter in from snow and did not know it. This truck ran over 20k without a filter in dusty conditions to the point the turbo had to be replaced under warranty. This guy no longer believes the piece of crap filter minders. [wonder why]

 

[rhorth]

Fabricate air Intake

Thank you guys for the input and excellent idea for using a screen on the elbow behind the bumper. I have already fabricated it (in my mind only) and will apply the idea when it warms up a little (now minus 11). since my post I noticed in TDR issue 50 page 168 off the shelf cold air intake system is featured from right here in Golden CO and they use an air baffle just below the drop in air filter. I wonder if that wouldn't break up the snow, but myself I would think the screen below would do double duty-keeping bugs and leafs out!

rhorth