this is a link from Facebook, but this guy is not quitting with mediocre performance, he has upped the game on power for the PSD in a Van.

for photos, follow his Timeline.
search for " J Boggle Olsen " that is the letter " Jay or J "

https://www.facebook.com/groups/2171472756454413/user/744322284/
https://www.facebook.com/groups/2171472756454413/user/744322284/?__cft__[0 · ·

Posting to a larger audience, as there is a lack of aftermarket support for 7.3 vans.

I installed a KC stage 1 turbo in a 7.3 Econoline and was unsatisfied with how everything was jammed together under the hood with my last attempt to modify the stock air tube, so I tried again.
Why:

The KC turbo stage 1 has a 3.5" inlet, and there are no aftermarket parts that support this upgrade for a van. I suffered through figuring out the details so you don't have to!

First attempt:
I started at the turbo. Getting a 90 degree bend with such tight clearance required a cobra bend intake tube (part in list below). This pointed the intake up at 45 degrees, and 45 degrees from the direction of travel towards the passenger side. I was able to jam the tapered old metal CCV attachment into the 3.5" opening on the cobra bend tube, but I didn't like how poor of a seal that created, and dusting the turbo is a no-no. I was able to make this work however with the stock air tube, but only by plugging the resonator hole in the air tube and jamming the whole air tube between the CCV and air box. This did work, but was obviously not a long term solution!
Second attempt:
I wanted something that fit right and allowed me to use the stock air box. Not wanting to cut up my stock air tube without the ability to go back if I made a mistake, I got a used one from a junkyard in ID for ~$68 shipped. I cut the tube apart just forward of the resonator hole and trimmed down some of the ridges so I would be able to get a hose clamp on later. To join this with the 3.5" opening on the cobra head, I then used a 3.5" > 3" 45 degree aluminum reducer, a 3" > 3" 45 degree silicone tube, and a 3" OD coupler (see parts list below).

What about the crank case gases? I didn't want to reroute the crank case vent, so I got a 3/4" fuel line > 3/8" NPT fitting and tapped the aluminum reducer (see photo number 2).

Wouldn't you know, it all fits! Look how much more room there is in there! Total cost was around $250.
PRO TIPS:
- If I had to do this again, I would try to do this with 3.5" pieces for more air flow. I did not go this route because I was unable to find all of the right pieces with these tight bends that are required for the tight spaces in vans. The cut off stock air tube piece is roughly 3" as well, so there will be a 3" restriction no matter what you do.
- You'll want to buy a new 3/4" fuel line to connect the CCV to the valve cover on the driver's side. 1' should be enough.
- Get all of the little aluminum shavings out of the intake, or the turbo + your engine will be eating them for lunch
- A cell phone flashlight works very well rested on the passenger side valve cover, but make sure the engine isn't hot and grab it before you close up the dog house!
- Most auto stores don't have a 3/8" NPT tap in stock, but Harbor Freight does!
PARTS LIST:

https://www.intakehoses.com/silicone...-head-elbow-35...

https://www.cxracing.com/EB350R300-4...20elbow&page=2

https://www.cxracing.com/SH300-3BK-4...%203%22&page=2

https://www.cxracing.com/.../aluminu....../PIP300-S-4

https://www.napaonline.com/en/p/BK_6601524...

https://www.google.com/search...

Plus hose clamps