AEM Water Bypass Valve...

javy212

Member
Contributor
I just got my injen in the mail yesterday, and was thinking that I might want to get a water bypass valve for it. Has anyone done this? Where would the valve go on the setup, and what size would I need to get?
 
i'm as paranoid about this stuff any anyone, and if you check out some past posts, you'll see what I'm talking about...:D but, you do not need a bypass valve at all. The location of the filter/opening, and the situation you would have to be in to get water up the pipe into your engine is almost impossible (unless you like swamp racing, and even then, its optional:D ) i live in SEastern PA and drove through the rediculous rainstorms we've been having recently, 3in+ of water, and not a problem. You should install it first, and you'll see what I'm talking about. IF you want to go through with it after that, its an easy fix between the end pipe and the MAF sensor. you'd probably need 2 extra brackets. I can snap a pic and show you with arrows where if you'd like. shoot me an email if so.
good luck with the install:D :) yOu'll really like the change in throttle response and smoothness...not to mention the sound.
 
Thanks for the reply. I figured that's where it would go, but seeing as I haven't even installed the CAI yet, I wasn't sure if the endpipe would still clear the fender opening with the valve there.

I live in Jersey and I know exactly what those storms where like... I guess if you didn't have a problem there, then I shouldn't worry (I'm a bit paranoid myself).... It doesn't really get much worse than that around here.... :cool:

Thanks again!
 
The one time it would/could ever be a problem would be down the jersey shore if you were parked going the wrong way (since the intake is on the drivers side) in one of those nice 2foot puddles that can form along the curbs, other than that, there should never be a problem. If you think of it in different terms you could understand why...putting on the bypass valve is like putting a crack at the top end of a straw...the air comes in the crack if the bottom is submerged, thus no water makes it up the straw; without that crack, even if water is getting close to the bottom of the straw, until its submerged will it ever make it to your mouth...:) sounds odd, but when you think about it, it makes sense.

Good luck

oh yeah, if you still do deceide to put it on, which I would never hold against anyone, it will still fit without a problem.
 
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I was concern about that too, especially the area I live in. But so far so good (knock on wood). I agree on what the other member, that water will only get in if your filter is submerged in water.
But I have an image I downloaded before on where to attach the bypass valve...

I hope this helps you...
 

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I was hella paranoid when I got my INJEN CAI....too

But with a little bit of engineering I put an extra filter right where the intake sucks in the air from the ground. I got it form home depot. It is one of those water resistent filters you can cut and put in your existing home air filters. I also taped up any existing cracks in the bottom with duct tape(it is still there after 3 months) and made a little bracket from duct tape and paper clips to hold the filter in place. (believe or not I did this oneday at work when it was pouring outside like crazy and I had to come up with a quick solution to my paranoia:D ) So far this has worked great for me.....no water what so ever gets on to the INJEN air filter. Plus....as soon as the rain ends I just pull the wet filter right off, let it dry (which take a couple of quick flick of the wrist) And am off.
 
regarding the filter, i had a b**** of a time getting in the fender-well.... I peeled back the black panelling in the wheel well, but didn't have much room to work.... is it easy to take off the panel and do it that way or is there something I'm missing?
 
javy212 said:
regarding the filter, i had a b**** of a time getting in the fender-well.... I peeled back the black panelling in the wheel well, but didn't have much room to work.... is it easy to take off the panel and do it that way or is there something I'm missing?

there is ALSO the piece on the bottom you can remove...takes 4 more screws/clips....and you work from the bottom side too....that is what I did and it made it 10x easier than just working through the wheelwell.
 
Yeah, i got the AEM short ram intake and i tried to get the by-pass valve for it but the ppl that work there said that it wasnt necessary. Its been 3 weeks and everything has been roses. I spent the $50 new pedals.:D
 
yeah...a bypass valve would be pretty much useless since the filter doesn't anywhere near the fender...i've heard of a couple of people that have had problems without a bypass valve but that's becuz they were stupid and drove through a lake of water...as long as you're not doing that you should be ok...

read this article to learn more...they had to completely submerge the filter for the bypass valve to kick in...

http://www.sportcompactcarweb.com/archives/tech/tech01_0401.shtml

happy driving
 
big_ben said:
Don't waste your money.

Yeah it's just your motor you'll be messing up.:rolleyes: I'm sure there are plenty of incidents that people could use to say that the bypass valve isn't needed. I personally will ahve to disagree in saying that is not needed. I have to friends who were victims of hydro-lock (spelling). With both of their cases, the bypass valve could have saved their motor. So, I leave it upto you. I see it as people looking for and excuse for not spending the money and being cheap or just flat out being a sceptic. I remember there was a big thread on ClubSI a while back about the bypass valve being a joke. I also remember that thread ending with guy who started it saying that he wish he would've bought a bypass valve because who had sucked up some water messing around un the rain trying to prove a point to his friends.
 
Is my engine worth the $30?

Absolutely. I think I'm gonna have to go with Apex on this one. Thanks everyone for your input, but I think I'm gonna buy the valve.

The question now is, what size do I need to get? I have the Injen, so I think it's 2.75" that I need, but can someone confirm? Thanks.
 
Re: Is my engine worth the $30?

javy212 said:
Absolutely. I think I'm gonna have to go with Apex on this one. Thanks everyone for your input, but I think I'm gonna buy the valve.

The question now is, what size do I need to get? I have the Injen, so I think it's 2.75" that I need, but can someone confirm? Thanks.

javy....if you are going to get one...YES, the proper size is a 2 3/4" bypass valve...

something else...I have heard people TRYING to figure out how to install it....I have heard of people cutting the pipes, saying that if they don't its too long and won't properly align with the hole in the fender and all....well the truth be known....they just didn't install it in the right place to make it a nice clean install.....

all you have to do is put the bypass valve in line with the MAS/MAF.....connect one end to the sensor...and the other to the tubing.....this deletes/omits ONE of the soft parts that comes with the kit. and everything fits like a glove.

here is a picture of the location I mean
 

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If you decide to connect it to the sensor, it would be better to connect it between the sensor and the throttle body. This will almost guarantee that your sensor will still getting a proper reading. Placing it right before the sensor could cause you sensor to give the ECU some funky readings. AEM also says to get the bypass valve as close to the throttle body as reasonably possible.
blue_intake.jpg
And should be installed along the upper portion of the intake pipe along the same axis as the throttle body. Good luck man.
 
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