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Old 04-09-2005, 12:28 PM   #1
SubaruImpreza_power
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Question Could I remove the silencer and...

Not need to get a MAF adaptor or anything like that?

from at least I saw the Silencer connects to the air box and the airbox to the intake, I take it I would have to hack it off which would leave a hole?
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Last edited by SubaruImpreza_power; 04-09-2005 at 02:58 PM.
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Old 04-09-2005, 02:57 PM   #2
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Old 04-09-2005, 03:12 PM   #3
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Wich car are you talking about here?
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Old 04-09-2005, 03:22 PM   #4
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The Impreza if you watched the Video.

lol never seen a bright green Forester before lol
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Old 04-09-2005, 03:44 PM   #5
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The silencer is usually located in the fender, and yes you can take it out without any harm done.

the hose you pulled off appears to be for the idle air controller, Im suprised the car even runs with it off. What does the other side of that hose connect to, and Im assuming it connects to the airbox on the side you pulled off?

Jay
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Old 04-09-2005, 04:45 PM   #6
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Ummm Nope, from looking at the underside picture it's some kind of Vavle, but I'm going to take a picture.
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Old 04-09-2005, 04:57 PM   #7
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Here are the pictures



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Old 04-09-2005, 05:25 PM   #8
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im not sure what that is, what does the other side of that valve connect too. Never really looked that close to a 1.8.

Jay
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Old 04-09-2005, 05:29 PM   #9
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Yeah I'd like to know if anyone finds out.. I know when I pulled the same hose when I had my 98 forester the car died in about 1 Second..

So before I start it's ok just to have the box in like that?

I would with the Box still closed could I still get the Boxer sound?



Also if you did not hear it, How come the Boxer sound cuts out? Is my engine retarted or something? All other Impreza I've heard the sound never cuts out.
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Old 04-09-2005, 05:30 PM   #10
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ok I just looked in my parts book, its the silencer for the air suction valve. (idle air controller). You want to keep all that stuff hooked up as is, if you delete that silencer your car will probably make some weird hooting noises at idle.
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Old 04-09-2005, 05:34 PM   #11
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hmmm.... So why wont it stall odd, it does sound like a Suction vavle however it sound deeper with just the covevr off.

And it's funny as well because I drove around one night to see if the sound would come back and it never made any funny sounds at all it was like it was connected again once the boxer sound of it went away.
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Old 04-09-2005, 05:38 PM   #12
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It doesnt stall probably because its a different design than the new models, and that silencer might have something to do with why it doesnt stall.

If you want to experiment, try taking that silencer out and see if it stalls, In the new cars that hose is hooked up after the maf sensor, in yours its looks to be hooked up before the maf sensor.

when you pull off that hose on a new car with the hose hooked up after the maf sensor it creats a massive vacuum leak, the air entering the intake is unmetered air (not seen by the maf sensor) so the car stalls.

In your case the air its hooked up before the maf sensor. So im gonna say thats why it doesnt stall, because the incomming air is still being metered by the maf sensor.

Jay
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Old 04-09-2005, 05:43 PM   #13
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If you want, pick up a small breather filter to stick on that suction valve hose.

Keep the other port open as long as before the air filter because you dont want unfiltered air getting into the engine


The parts book still shows a silencer in the fender well for that year that you can take out and make it even louder.

Jay
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Old 04-09-2005, 05:56 PM   #14
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yeah but maybe you guys don't understand or i'm missing something myself

how come like 20 seconds later the sound goes away... and the only way to get it back is to turn the car off for 5 Min and the sound comes back for another 20 sec.



So here is what i'm about to do...

Take the silencer out of the Fender but leave the stock airbox in when i did the video it seems like I will need to reinforce the box as it's not loose in the engine bay, take it I will get the same sound. But will the sound keep going and not stop after 20 sec?

I take it the silencer goes back in with no problem.
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Old 04-09-2005, 07:35 PM   #15
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I took it out and just found out it's the same... The sound still cuts out after 20 seconds, something from that air suction vavle that tells it to Stop Sucking

I might have to ask on a guy with the same year as my car to see what did he do, It sounds great when you hear it, but the sound goes out like a light.

I want it to stay.

And the pain was to put all the crap back like the Snorkus... which btw had a small crack in it.
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Old 04-09-2005, 07:47 PM   #16
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Pictures





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Old 04-09-2005, 08:18 PM   #17
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I kinda remember that part from the 1.8. It was loud when you disconnected it from the airbox. If it is indeed the muffler for the air suction valve, then when the air suction solinoid turns off, the loud noise will also stop. It will only make noise on startup then as it warms up it will switch off.
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Old 04-09-2005, 08:22 PM   #18
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Well it seems without that all you hear is Air Sucking in, If you had a CAI with a cone filter..

What can I do to keep it from turning off?

You and Kostamojen are the only 2 I know of on here that have a model close to my year.
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Old 04-09-2005, 08:56 PM   #19
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do you just want the noise? I mean its a throaty sound but you dont want to jump the solinoid to keep the valve open, because its not supposed to be open all the time. The best way to get a good induction sound is spend $30 for a MAF adapter and cheap cone filter You'll get better throttle response too. And with a MAF adapter your airbox will be gone, and that muffler still wont be connected so for a few min in the morning it will still make that wierd noise.
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Old 04-09-2005, 11:23 PM   #20
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When that Suction vavle cuts off all I hear is the sound of air sucking in when I get on the throttle...

Why is everyone saying you get a boxer sound? becaue I don't

Tonight (I know you should not do it)

I ran with the Airbox not Snapped down.. Well I really forgot.. When I got on the throttle My god was it loud! but it it sounded more like some riced out Honda then a Boxer sound.. Tomorrow I will do a video oh how it sounds, I want more of the Boxer sound if thats possible.
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