I am looking in to this and thought I would share it. I think using the stock air box I can get a ram air, or at least cowl induction effect. If you elbow the air tube straight up and use metalic dryer hose you could get the air induction to the hood through which you could put a tube leading to a scoop facing either forward for Ram Air, or backward for cowl induction. It also seems possible that this could give more water clearance for that occasional creek crossing. If you have any ideas or have seen this before let me know I will let this post run for a while to get input before jumping in to this project. My B2 is a 1986 and I realize this doesn't apply to everyone. Chip in a few ideas and maybe something good will come of it.
Thanks.

 

if creek crossing are your thing I would go with cowl not ram air, you'll feed that poor thing water instead of air. Unless you built it to be raised from the hood and could be covered,closed off, or make it where you could connect another tube to it whether it be dryer hose, pvc pipe, big thick walled rubber tubing, AUTOZONES air induction hoses, water sump pump hoseing anything that will last, hopefully thick rubber and or pvc. tree branches will destroy a dryer hose or the equivalent. And run it inside the bronco or to the roof. either way might net a couple of horsies (yes horsies) the best thing though will be that it should run a little cooler and drier inside during creek crossings. Don't forget if you ram air it to watch the air fuel ratio, don't want to burn a piston. Oh and I would make either way compatable with a snorkle to like I said the roof or inside, and don't forget a good filter, and if you run it to the roof, you could put it inside something like a homeade air box or something to keep rain and slop off the filter.

 

I don't intend to ram air it, but I do like the prospects of a removable scoop that I can put a snorkel on when I need it. If I put any thing taller than a scoop that was not removable I would kill it on the first narrow trail I went down, my mirrors already take a beating (tree limbs) as it stands. Thanks bigfry, your input will be very helpful.

 

If you plan on making it snorkel adaptable, on my big toyota I used tupperware. Yes Tupperware. The thing had a webber carb on it when I got it. It was a 75 corolla I traded a sega genisis for. It just grew and grew. It weighs around 8000 lbs. now that I shortened it. It has a 179 to 1 ratio with everything locked in low. anyways I used the lid, cut out the shape of the top of the carb. Siliconed it and placed the original sheetmetal bottom on top of that for support and bolted it down. I attached autozones flex hosing to the top by way of fiberglassing a 3" pvc pipe to the tupperware bowl. then I popped it into the lid to form a watertight seal. I used a huge hose clamp, like at Lowe's to tighten around the lip to make it sturdier. I mounted two 3" filters on the end at my roof and painted a damn small bucket and enclosed it to keep crap off of it. But it works. IF I were you start with your original air filter enclosure. and seal off the inlet to fresh air and all the other little holes that could leak air, you could use jb weld, plumbers putty, silicone, or better reinforced fiberglass they sell at wal-mart, and if you haven't ever used the stuff, don't worry, its easy. It mixes like the jb weld and sets up quick. Its a lot stronger and sticks alot better too. Make sure you use the reinforced variety, it looks like green putty. Make sure you use some sort of silicone or some kind of gasket to seal the bottom of the case to the carb or whatever, and look at the carb for possible leak locations, I didn't see carb or injected anywhere. then make sure you have a good seal on the lid as well. Cut a hole in the lid for a short length of 3 or 4" pvc and fiberglass it in there. it should barely stick above the lid about 1 inch. Then use a rubber pvc connector (Lowes)
to go to the hood. Mount a filter at the end with a hose clamp. Build your removable cowl to fit. then when deeper water comes take the cowl off and the filter and you could just have a hose or pvc tube (still 3 or 4 inch diameter) you could run to the roof, or through the passenger window inside and put the filter on the end of that. Fuel injected would be similar to above. You could also make the statement by running a piece of pvc up a window pillar to the roof with a little braketry and use the connection to that or run it out the fender instead of the hood. I'm probably going to run mine to my glove box or somewhere on the interior, I am pretty hardcore though in the mud and water, though. Theres all kinds of ways to do it, you could build your cowl hood to allow excess heat to exit more freely and still have the snorkel ran to the interior, or out the fender to the roof and it would give you the best of both worlds without having to deal with removing anything, it would always be ready, and you would still be getting nice cool air to the intake. I have a hell of a lot of ideas about that crap, can give more backyard designs or more indepth ones if needed. Good luck.

 

Thanks bigfry, I will look into the fender idea. If it is posible, I am sure with my body shop skills, mixed with a little boatswains mate enginuity I can fiberglass or weld something. If I go out of the fender I will probably make it non removable and run it up the window pillar. By the way mine is fuel injected and has a seperate air box. So the box will be the root of all modifications.

 

Sounds good to me, bet it will look good too, better yet work good. thats what really matters anyways, nobody wants to breath water so why should your engine have to.