I went and cut the front part of the intake (part that sticks into core support) off, plilugged the hole using great stuff and two portions of the cut off piece. Then i went and got a box elbow from true value cut a square in the back and put it back there with some silicone sealent around the edges. Ended up not aucking in water when i dipped into a water hole over my hood and that came up to my cherokee symbol when driving through. Definetly got my pants wet though
A lot of people replace their air boxes with cone filters to get more air flow. The problem is not the filter as much as the corrugated section between the air box and TB elbow. The corrugations disrupt air flow no matter what filter you use. To solve this issue on mine I dropped in a K&N panel filter combined with a piece of exhaust tubing 2 1/4 in. IIRC just long enough to go from inlet and outlet transition inside the tube. I sprayed some silicone spray on the tube and slid it inside the flex section. If you look at the inside of the hose you will see where the corrugation stops and becomes smooth on each end. This is where you want the pipe to stop. I measured this mod before and after with a digital air flow meter at work. I tested it at idle and there was a 6 cfm airflow increase. Air flow will increase at higher velocities as well because the turbulence would be greater at higher velocity without this mod. Total cost : about $47 for the filter and $5 for the pipe. And there is still enough flexibility to change the filter when needed.
'97 XJ Moss Green Metallic. 2DR. 2WD AW4 factory tow. General Grabber AT2 255/70x15.
No, you don't lose heat. The cowl is a big, open area and there's plenty of flow to feed both the engine and the HVAC blower. The snorkel doesn't come through the firewall. It ends under the windshield wipers.
My build thread has pics again. http://www.jeepforum.com/forum/f177/kevin108s-2000-xj-build-867428/
Another alternative is to use a 90 degree and 45 degree PVC fitting to just raise the intake up and back. That way you dont have all that sucking noise in the cab, but raise your ability to enter the water.
Im the guy who makes new gauges, check out our gallery at Teamadw.com