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Old 12-20-2007, 12:29 PM   #1
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Exposed air filters - bad when it rains?

4BD7341BA29E402FA9AB6E5DAF597E8D

I've been considering a similar intake to the one above, but it seems like it would be bad news if it were to rain or even ride through a sprinkler. On the contrary though, I havent been able to find a thread on other forums where people have mentioned any problems when exposed to the elements. Some even claim theyve ridden though storms for hours and there werent any problems. It's said that the oil from the filter will bead any water off.

What's your take?
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Old 12-20-2007, 12:33 PM   #2
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the oil would help, and some would probably get sucked into the motor, but not enough to make a difference.

I seriously doubt that modern bikes with ram air are able to keep all of the water out of the airbox even with the design of the tubes and box.
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Old 12-20-2007, 12:34 PM   #3
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Old 12-20-2007, 01:24 PM   #4
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Old 12-20-2007, 01:30 PM   #5
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Well consider, if any air-filter was truly watertight, the air-flow would be so...restrictive.

The question comes to how much water is making it through...if your ride seems to run fine I'd think you have no reason to worry. If the down-pour was enough to cause a problem, I think it'd be likely you really don't want to be riding in the mess for other reasons anyway.
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Old 12-20-2007, 02:07 PM   #6
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I have something similar hanging off the turbo on my scoot, I've ridden in rain so freaking bad I was wishin for pontoons, none the less, the motor still ran just fine.
BTW, I'm talking tsunami type rain and it didnt seem to bother it
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Old 12-20-2007, 02:10 PM   #7
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Quote:
Originally Posted by ScooterTrash View Post
BTW, I'm talking tsunami type rain and it didnt seem to bother it
it does not rain during a tsunami, its a wave.


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Old 12-20-2007, 02:26 PM   #8
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Quote:
Originally Posted by maskale View Post
it does not rain during a tsunami, its a wave.


That's why he was wishing his is a pontoon.
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Old 12-20-2007, 03:27 PM   #9
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Quote:
Originally Posted by maskale View Post
it does not rain during a tsunami, its a wave.


yes indeed, but wet is wet
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Old 12-20-2007, 03:59 PM   #10
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Old 12-20-2007, 04:30 PM   #11
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had an old t/a with an open scoop that would get wet if it rained. Never bothered any while running. Just when it would storm while the car was sitting. Of course the filter would get wet but and it would run funny for a min or two. After that everything was gravy

Wont hurt
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Old 12-20-2007, 05:01 PM   #12
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Back in the day a quick tune up and carbon cleaning consisted of trickling a bottle of water down the carb while you held the throttle at around 3K. Just like was mentioned it turns to steam and cleans the innards out pretty well.

Won't hurt a thing running a filter like that unless you submerge it.
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Old 12-21-2007, 10:36 AM   #13
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Thanks for the info guys, I think i'm gonna go ahead and get one. Hey scooter, does it sound different than a standard AC? Does it go whoooooosh on wot? lol

I think i'm gonna go with the Madonna...
Exposed air filters - bad when it rains?
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Old 12-21-2007, 10:41 AM   #14
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Quote:
Originally Posted by hornet View Post
it will not affect performance imho-think about it this way, its being injected into your MOTOR wich is VERY hot...turns instantly into steam and is passed with your exhaust gas....i cant see why it would harm your motor in any way....
because water doesn't compress.....so when your intake valve opens up and enough water comes through....the piston will come back up and try to compress the air/gas along with the water....everything compresses besides the water....so when it combusts....it leaves pits in your piston.....and if enough water goes through.....hydrolock occurs.....and your motor is a goner.
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Old 12-21-2007, 11:27 AM   #15
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Quote:
Originally Posted by dru View Post
Thanks for the info guys, I think i'm gonna go ahead and get one. Hey scooter, does it sound different than a standard AC? Does it go whoooooosh on wot? lol

I think i'm gonna go with the Madonna...
Exposed air filters - bad when it rains?
I personally dont go for any of that blingy looking stuff, but to each his own.

I have one on mine because its whats needed with the turbo install. I have an open K&N and it howls and screams like a , but then again I'm running 8# of boost on a 10.5:1 compression motor at WOT
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Old 12-21-2007, 11:30 AM   #16
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Quote:
Originally Posted by houseofpain View Post
because water doesn't compress.....so when your intake valve opens up and enough water comes through....the piston will come back up and try to compress the air/gas along with the water....everything compresses besides the water....so when it combusts....it leaves pits in your piston.....and if enough water goes through.....hydrolock occurs.....and your motor is a goner.
hes not gonna get enough water to hydrolock, no way.
If its that bad out, very doubtful he will still be riding.
I do carry a ziplock baggie for the times that its parked and I get caught in a downpour, I slip the baggie over it.
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Old 12-21-2007, 11:54 AM   #17
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Old 12-21-2007, 12:10 PM   #18
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Quote:
Originally Posted by ScooterTrash View Post
hes not gonna get enough water to hydrolock, no way.
If its that bad out, very doubtful he will still be riding.
I do carry a ziplock baggie for the times that its parked and I get caught in a downpour, I slip the baggie over it.
hehe, does it have a reservoir tip, like a condom?
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Old 12-21-2007, 12:21 PM   #19
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Quote:
Originally Posted by texlurch View Post
Back in the day a quick tune up and carbon cleaning consisted of trickling a bottle of water down the carb while you held the throttle at around 3K. Just like was mentioned it turns to steam and cleans the innards out pretty well.

Won't hurt a thing running a filter like that unless you submerge it.
yea my old man would have me keep the rpms up on his drag car while he poured in the water....keeps the combustion chambers pistons and valves spotless.....i thought everyone knew this old school tip.

imo.....wont hurt a thing (rain and sprinkler that is) different story if your crossing a river
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Old 12-21-2007, 12:24 PM   #20
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As some others have mentioned, a little water shouldnt hurt - some forced induction cars (including my previous Z28) use water injection for intake air temp cooling. I'd imagine your engine would stop firing, before you ran into hydrolock issues.
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