CJ's98XJ said:I've done a lot of research on this. There seems to be a lot of misguided well intent when it comes to 4.0 litre intake. The #1 important thing to remember about the 4.o L is that the tbody is the choke point. The stock set up is a cold air intake. It is capable of providing more air than the engine can suck through the standard throttle body. The air box also draws air up through the filter with the opening at the bottom of the box. This is not happenstance. It was designed like this to help with water. I haven't put it to the test but I have red that this was so that when water reached that level, unless you were heavy on the stupid pedal, the water would choke out the engine rather than hidro it.
I would suggest that unless you really want some kinda custom thing, a snorkel or you are looking to create the forced air effect, find an oem intake at a junk yard and spend the extra money on something else.
projectTK said:well previous owner did the route the intake through firewall mod i bolted sheet metal on fire wall and blocked it off. So all i have is the small piece coming off the intake.
TellicoReadyXJ said:Ok, you meant actually through the firewall, I thought you meant through the firewall into the cowl.
Best way honestly if you are worried about water is the stock airbox with a higher flowing filter. The cone setups are great, but are very susceptable to sucking in water if you get a good splash through the grille.
balloo93 said:http://www.cardomain.com/ride/325707/7
I have sinse used a metal bucket with the side cut out so that when layed down it's open up top. Cut a hole or a U in the bottom of the bucket and put the intake tube on it or through it. Trim or shape the open end around the front header panel to block off under hood air as much as possible.
You can install a smal house vent or vent off of a donor car on the hood tword the front ahead of the filter to draw in colder outside air. You can build a small baffle to keep water from directly hitting teh filter, but allow air to get around and drawn in.
Personally, I just went back to stock air box and panel filter replacement.