Been working on a cowl intake... Going the Ford route, but a bit different than normal with the supercharger placing the throttle body pointed towards the firewall. I'm running meth in boost but it still gets pretty hot out of boost. Not enough to be a real concern, but colder air is more efficient and when I roll onto the power and it starts spraying it'd be nice if everything is starting out 20 or 30 or whatever degrees it may be cooler than what it currently is.
Picked up an intake from an Econoline first. It's considerably bigger around, about 2" in diameter if I recall. Too big to fit under the hood without having to move a bunch of stuff and/or some complex bends to route the air back, I tried. The intake snout on the Econoline box is almost 3" in diameter.
Then I got a Windstar box. Considerably smaller, and the intake snout is only 2" or so. I'm not exactly sure, because the junkyard sent me everything
but the snout. But with the snout removed, the plastic housing necks down to 2.25."
So, out came the dremel, RTV and rivet gun.
I cut a hole in the firewall to fit the 3" snout. The inlet end of both air boxes have the same angle taper, so I cut them both off and grafted the larger Econoline snout onto the windstar box. Then shortened the windstar box MAF sensor section.
Now it's 3" in from the cowl, and 4" out with the main center section of the paper filter being 3" as well. Hopefully this isn't too restrictive.
Ordered a 4" to 3" 90° elbow, two 3" elbows, and a 3" to 2-5/8" elbow to make the last bend into the throttle body. Waiting on the elbows and the 3" aluminum pipe.
So it'll come off the end of the housing, turn across and above the valve cover, run down the middle towards the firewall, then dip back down to behind the supercharger.
Should work. Better than the 2.5" warm air intake I had on there previously, anyway. Then I'll finish it all off with some tacky gold heat tape.