I want to replace the hemi hat and intake tube with a piece of pvc and leave the stock air box. I have a few questions though. 1) What did you all do with the crank case vent that is connected from the oil fill to the hemi hat? 2)Is the air sensor threaded and what hole size do I need in the PVC? 3)What size pvc and angles do I need along with the rubber boots? and 4)If i go with a 5" pipe, Where do i find the rubber coupler adapters for the larger pipe? Is there a special name for them and what section of the store are they in?

 

5" is a pretty large diameter pipe. Most go with 3 or 4" I went with 3" We used a rubber boot, a length of 3" pipe, and 2 90's. You can find it all in the plumbing section of any home improvement store for cheap. Yes, the air sensor is screwed onto the hat, but we just found some rubber grommets that fit the sensor and drilled a hole accordingly. I forgot what size hole we ended up drilling for it. We had it all end up in the bottom of the original air filter box. Also found a shelf hanger that mounted we mounted to the box and clamped it to give it some stability. Here's some pics.

Here's the boot onto the tb:

newcai1.jpg?t=1277399839

Here's the first 90:

newcai2.jpg?t=1277399909

Here's the length of pipe. You can see where the clamp is next to the 90. Under the CAI is where the shelf bracket is located.

newcai3.jpg?t=1277399927

On the left you can see where we mounted the air sensor.

cai6.jpg?t=1277400008

Here's the last 90 with the K&N. You can see where we put the filter in the bottom of the air box. Kinda keeps water, etc. out. See that small filter??? That's the crankcase vent tube.

cai1.jpg?t=1277400045

Hope this helped.

 

Oh, I dunno about this one kx, you need to use a power saw or at least a hack saw to cut that PVC and them hose clamps can be pretty sharp on the edges... If you get boo-boos taking the air box cover off, maybe you better leave this one alone!!!





Seriously though, I dunno about 5" on the PVC. Wider does not always equal better airflow. An exhaust tube can be too big in diameter and actual HURT performance. So I'm thinking same principle here.

Some have done 4" which I think would be the max, most do 3"... You can find all kinds of reducing couplers at the local hardware store, usually right alongside the PVC pipe. Might be since you are gonna keep the air box with a drop in, you could get by with just about 3' of pipe and one 90*. Take you a tape measure and do some measuring.

I guess you can tap the PVC for the sensor, schedule 40 should be thick enough for a couple grooves, but just a rubber grommet with a little PVC cement is more than sufficient to hold it in. I'd cement the grommet first and let it dry good then push the sensor in as to not mess it up, although really a tight fitting grommet without the cement is probably enough.

As for the breather tube, you can drill a second hole in the pipe slightly smaller than the tube and push it in, it's rubber so that will go pretty well or just pick up a small filter for it, all the auto parts stores carry them for under $10...

 

HAHA funny jokes! NOT.

I think I'm just used to ordering parts for my dads diesel, thats where the large diameters are coming from. Well 3" sure makes thing a whole lot easier to find now.

Now im thinking of a 90 into a straight tube and then a coupler into the intake and for the crank case vent just a small filter.

 

You got the idea kx. Not too hard at all. Especially if you got some beer.

 

I think the filter on the crankcase tube is the way to go personally. I've seen the TB on my truck and a few others with an EGR and the tube going into the air intake system at 15k and the TB was a gummy, filthy mess!
I've seen the TB on a truck that doesn't have an EGR and uses a filter for the Crankcase breather hose and it 78k miles having NEVER been cleaned, it was clean as a whistle.

STUPID EMISSIONS LAWS!!!

 

You mean....like this? I used 4" PVC and a 4" coupler to the airbox....should have done 4" to 3.5" reducer....and did a reducing 90 degree for the throttle body.....4" to 3.5".....

For the IAT, I used a PCV grommet for Toyota from Autozone.

check out siliconeintakes.com for the rubber connectors, etc.....

 

Perfect!

 

Heres mine.. i went to 4 inch cause i have a filter laying around for some reason- used a 90 and a 45 degree to bring it behind the headlight. used rubber couplers and for the sensor i just drilled a hole and stuck it in--the o-ring holds it in nicely, but cannot remember the size of bit. for the PCV tube i took it out completely and just turned the tube upwards and it vents to atmospher--sorry about the crappy second picture...im about 2000 miles from truck right now but you can get a jiff about how i have it located and where the sensor is

 

Heres mine, Posted a pic heavy thread on mine a couple months ago