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Old 04-22-2013, 09:34 AM   #1
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Cold Air Intake Questions?

So after doing some off-roading this weekend I decided I need to change my air intake. The stock one sucked up some water after I dipped my front end in some deep water. I got lucky and didn't destroy my engine. With that being said I am going to make my own tubing with PVC but not sure what to use? I am going to use a K&N Air Filter with either the 3 inch diameter or the 3.5 inch diameter. Id like to use the 3.5 inch diameter one but they make PVC at 3 or 4 inch diameter no in between. Then Ill have to hook the vacuum lines into it as well. So I was just wondering if anyone made there own and what they did. Some pictures would help too? I just dont want to spend a ton of money on a cold air intake when I can buy the filter for 30 and spend 5 on some PVC. Any ideas would be greatly appreciated.

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Old 04-22-2013, 01:07 PM   #2
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search around for "homemade Snorkel" there are some options for sure. Just make sure you hit up everything else to take it in deep water. You'll want to also make sure your axle breather tubes are extended, no exhaust leaks, waterproof your distributor cap & coil & somehow keep your battery dry to. Maybe w/a plastic battery case like boats have. All electrical should be spliced and sealed up good as well.

Now on the other hand, just re-locating the intake to not dip it into water is easy. I used a shop vac hose (fits perfect into the front of the airbox w/a little tape around it a few times) and routed it back to the top rear of the engine compartment next to my master cylinder. I don't want to submerse it, but at least this way things arn't splashing into the airbox there behind the headlight.

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Old 04-23-2013, 10:35 AM   #3
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I really don't like getting into the deep water. It just happened this last time due to all the rain. I just want to fix the air intake set up and not worry about water proofing the rest. Putting a new intake in the old air box location defeats the purpose. So I just want to run one across the motor and have the air filter by the battery. Will PVC melt? Is there something I can use that is more heat resistant, or is there some heat shield I can use with PVC?
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Old 04-23-2013, 11:56 AM   #4
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Quote:
Originally Posted by rmeier View Post
I really don't like getting into the deep water. It just happened this last time due to all the rain. I just want to fix the air intake set up and not worry about water proofing the rest. Putting a new intake in the old air box location defeats the purpose. So I just want to run one across the motor and have the air filter by the battery. Will PVC melt? Is there something I can use that is more heat resistant, or is there some heat shield I can use with PVC?
There is little difference between moving the air intake across to the other side of the engine bay, it's still going to be sucking in warm engine-bay air. If you really want a true cold-air intake, the intake needs to come from outside somehow, whether it's a snorkel or a ram-air induction hood scoop. You might spend a lot of time fabbing up something that's going to have negligible results air-temperature wise if you create a PVC intake that's still sucking in engine-bay air, and you're still at risk for taking in water if you ever hit a deep puddle again, no matter where you put it.

I seen once on my old forum where a guy made a shield for a K&N cone-filter that came out of the air box, but when you close the hood, the shield made a little cavern just for the cone-filter so it wasn't directly sucking in engine-bay air, and it protected it from splash water. The hood would come down and fit snug against the top of the shield, and the shield wrapped around an entire section of the drivers fender where the intake and filter was. I'll try to see if I can dig up some pix.
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