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-   -   Homemade air intake (http://www.wranglerforum.com/f218/homemade-air-intake-145565.html)

DasfieldmarshelsYJ 03-10-2012 10:31 PM

Homemade air intake
 
Was thinking about doing this anyone have any ways they did it?

BT 03-11-2012 12:25 AM

Go to CDM Fabrication and click on the tech write ups. Scroll down a little and there is a write up of how to make a Cold Air Intake for $35

banks316 03-11-2012 04:40 AM

I used a price of 3in exhaust tube.

banks316 03-11-2012 04:42 AM

1 Attachment(s)
Attachment 103855

CMEvans79 03-11-2012 04:58 AM

you might as well make a snorkel instead of a CAI ... Just sayin ... I have a CAI in my JK (Came with it when purchased) but I'd go snorkel instead...

banks316 03-11-2012 06:57 AM

I built my intake cause I wanted to use the stock air box space for my on board air. Also I don't do deep mud/water, My jeep spends 80% of the time on the rocks, snorkle isn't really needed.

DasfieldmarshelsYJ 03-15-2012 11:31 PM

What did y'all do with those to small pipes coming out of the stock air box ?

Xpress 03-16-2012 12:46 AM

You have to plug the vacuum lines back into the intake somehow. I believe they're both just to let air pass through into the intake.

bruceandjo95yj 03-16-2012 06:19 AM

Quote:

Originally Posted by DasfieldmarshelsYJ (Post 2145516)
What did y'all do with those to small pipes coming out of the stock air box ?

Heres mine
as far as the tubes.
I used a small breather for the front and drilled a hole in the intake pipe then screwed in an air compressor connector then used clear vinyl tube from a waterfall job i did in the back yard..

DasfieldmarshelsYJ 03-16-2012 12:21 PM

I got some 3" PVC piping probably gonna set it up tomorrow if it aint rainin where ya get that compressor cap ?

DasfieldmarshelsYJ 03-16-2012 12:49 PM

I actually got 4" PVC anyway I could make this work ?

bruceandjo95yj 03-17-2012 06:30 AM

AC piece is the male connector(cant remember its name)that screws into a tool...anywho got it from Home Depot....intake pipe is actually a 18" by 2" muffler tube..
Be careful with the PVC...mine was originally PVC and i was told if it gets to hot it puts off toxic gases..


O and Das...nice bumper...got exact same one but in chrome...:punk:
2nd pic is upclose of the connector...on old setup but its basically the same as new

bruceandjo95yj 03-17-2012 06:50 AM

Sorry..here ya go

wml52 05-15-2012 10:08 PM

Cold air intake
 
OK so here is my variation on the HUMVEE cold air intake theme. Now I just want to state that this mod was not an effort to fabricate a snorkel, but rather a way to get cooler air into the intake, although I suppose you could use it as a snorkel if you extended the intake tube. However I’ve been wheeling for many years and have never had to cross water so deep that I had to use a snorkel.

Most of the credit should go to Frank Steven Taldone a.k.a. “Kerndone” he has an excellent write up on this mod posted on JeepForum.Com http://www.jeepforum.com/forum/f27/w...intake-326040/.

The major differences between Franks mod and mine was the use of the Spectra Performance intake kit p/n 9943 instead of the Buick air box and the way I chose to modify the HVAC intake cover underneath the cowl.

The reason I used the Spectra Performance kit was that I got a really good deal on it ($50.00) otherwise the Buick air box would work just fine. I also chose to modify the existing HVAC intake cover a little differently and chose to fabricate a custom intake duct instead of the method used in the write-up. The reason for this was, in looking at the photos of the HVAC intake cover he had to cut away and cover a large portion of the HVAC intake area to allow for the fitment of the 3” diameter hose that connects to the toilet flange. I thought this would significantly reduce the amount of air (cfm) flowing through the HVAC intake adversely affecting the HVAC system.

In order to minimize the HVAC intake restriction and maximizing cfm flow rate to the cold air intake I took a few clearance measurements and made a cardboard template of the duct I wanted to fabricate. Since the Spectra intake was based on a 3” diameter tube that equates to approximately 7.0 square inches. I based my template on a duct that would give me approximately 7 square inches, which worked out to be a duct 5”x 1.5” or as close to those dimensions that available space would allow. As Frank stated it’s a very tight fit! It took a little bit of tweaking to get all the dimensions right for a proper fit and as you can see in the photo it’s not a perfect 5” x 1.5” but the shape and size does not seem to affect the cfm flow all that much.

http://i575.photobucket.com/albums/s...d/P5030362.jpg
http://i575.photobucket.com/albums/s...d/P5040364.jpg
http://i575.photobucket.com/albums/s...d/P5040365.jpg

The intake duct was fabricated from 16ga steel that I had lying around my garage, one 4.5” and one 3” exhaust pipe that I picked up at a local supplier, I also welded in place six 10-24 screws so I could mount the duct to the underside of the cowling. Once I welded all the seams I had limited access to the interior of the duct so I used Eastwood’s Internal Frame coating (p/n: 12511Z) to coat the interior of the duct to prevent any rust from forming on the inside. The outside was primed and painted using Eastwood’s Extreme Chassis Black Satin (p/n: 11175Z)
As you can see in the photos I also had to modify the HVAC cover to allow clearance for the intake duct to sit just above it and minimize flow restriction into the HVAC intake, it was just a matter of cutting away some portions of the plastic cover and laying on some fiberglass to the shape I wanted. It’s a close fit but it works quite well.

The intake duct is held in place using the six 10-24 screws and some #10 flat washers and #10 acorn nuts. The HUMVEE cap is held in place using three #10 security screws. I opted for the security screws to prevent anyone from tying to borrow the cap. Once everything was mounted in place it was just a matter of attaching the 3” tube from the intake duct to the 3” mounting flange that comes with the Spectra Performance kit, replacing the cowling and buttoning everything up.

http://i575.photobucket.com/albums/s...d/P5100371.jpg
http://i575.photobucket.com/albums/s...d/P5100372.jpg
http://i575.photobucket.com/albums/s...d/P5100375.jpg
http://i575.photobucket.com/albums/s...d/P5100377.jpg

All in all it took several hours over a couple of weekends to fabricate, fit and mount everything but I think it was well worth the effort. Your comments are welcomed.












Fabricated intake duct

RedBones 06-09-2012 02:50 PM

That looks really good.
I think that is all the higher I would need to go.
Liked the River Raider but a lot of $$ Really looking hard at the Rugged Ridge now.

jeep30 06-10-2012 10:34 PM

Quote:

Originally Posted by banks316 (Post 2127290)
I used a price of 3in exhaust tube.


Now, I could be wrong here but... exhaust tube is usually galvanized steel right? So, wouldn't that steel get heat soak??

Springsblueyj 06-11-2012 04:15 PM

Just cut your box open. Cut the front,driver side, and back of the box. Leave the bottom, lid, and side closes to engine alone.:) it works for me.

stykthyn 06-11-2012 06:31 PM

I would fashion a box to go around the filter. you are sucking in hot dusty engine air and not doing yourself any favors.

Springsblueyj 06-11-2012 07:24 PM

1 Attachment(s)
Here is a picture of mine.

Attachment 131002

costa 06-11-2012 09:39 PM

wml52.... couldnt have done anybetter....wow!!!.. i like alot hope u dont mind but im biting that style for sure!

costa 06-12-2012 03:28 PM

any clues on where to find that humvee cap?!!!!!!!! tried ebay, no luck..

Kenjpowers 05-09-2013 08:18 PM

Home made cold air intake
 
1 Attachment(s)
Here is my home made cold air intake, just have to make the heat shield around the filter. Also have the 3" throttle body and superchips 87 perf tune, goes like a bat out if hell!! The cai cost me 34$ to make, beats the $300 they want for an aftermarket one. I couldn't believe the difference it made, if anyone wants more info on let's know.

Kenjpowers 05-10-2013 04:47 PM

Ok bone stock I was averaging 17.3 mpg, after the superchips flash it went up to 22 mpg, now with the cold air intake at 26 mpg and hit a max of 36.2 mpg on the highway, so anyone who says cai are a waste are just plain wrong!

wrangleryj90 05-10-2013 04:50 PM

Quote:

Originally Posted by Kenjpowers (Post 3742304)
Ok bone stock I was averaging 17.3 mpg, after the superchips flash it went up to 22 mpg, now with the cold air intake at 26 mpg and hit a max of 36.2 mpg on the highway, so anyone who says cai are a waste are just plain wrong!

I call bull crap on that

bajajohn 05-10-2013 06:25 PM

Quote:

Originally Posted by Kenjpowers (Post 3742304)
Ok bone stock I was averaging 17.3 mpg, after the superchips flash it went up to 22 mpg, now with the cold air intake at 26 mpg and hit a max of 36.2 mpg on the highway, so anyone who says cai are a waste are just plain wrong!




I wouldn't go so far to question your truthfulness But Me Thinks Your Math Might Suck.:whistling::whistling:

Fishb0wl 05-10-2013 06:42 PM

Cut the numbers in half and I'd almost believe it lol

wrangleryj90 05-10-2013 06:45 PM

I figure it out guys he sold the jeep and bought a civic lol that's how it got that great lol

cwadej 05-15-2013 02:47 PM

Is it too late to jump on the BS band wagon?

SuicideSaints 05-15-2013 03:09 PM

Quote:

Originally Posted by Kenjpowers (Post 3742304)
Ok bone stock I was averaging 17.3 mpg, after the superchips flash it went up to 22 mpg, now with the cold air intake at 26 mpg and hit a max of 36.2 mpg on the highway, so anyone who says cai are a waste are just plain wrong!

I call BS, either you are trolling or your math skills are severely lacking or a combination of both.......

I mean this guy only has 2 posts and both are on this thread, next he is going to tell us he is putting down low 11s in the 1/4 mile.

sevenservices 05-15-2013 03:12 PM

"mine was originally PVC and i was told if it gets to hot it puts off toxic gases"

yes, they do. And when PVC burns it can can be so toxic even one deep breath will kill you. We also have to be very careful when cutting PVC. If it smokes at all, don't breath it in!!!


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