opinions on silencers
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This is a discussion on opinions on silencers within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; When I bought my subie, it had a full aftermarket exhaust, with a silencer. What are your opinions on silencers? ...

  1. #1
    Registered User svynx's Avatar
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    opinions on silencers

    When I bought my subie, it had a full aftermarket exhaust, with a silencer. What are your opinions on silencers? I know that they are a cause to a drop in HP, and depending on the engine setup it could be a lot. My main reasoning for asking is that I have heard that it can cause issues with the turbo and engine because of the added back pressure. Anyone have thoughts/personal experience with this?
    Cheers

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  3. #2
    Registered User jeffmm06's Avatar
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    IMO if your going to use a silencer, why did you buy a CBE to begin with (I know yours came with it, thats my general opinion on them) I would just put the stock CBE back on. If your worried about dB levels, get a quieter system, like a cobb, or SPT.

    Im not 100% sure but it seems to me that if the silencer caused issues to the car, the manufacturer would not have included it.
    Last edited by jeffmm06; 08-22-2008 at 05:20 AM.
    2005 WRB WRX "was" STAGE 2

  4. #3
    Registered User svynx's Avatar
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    From what I was told, the first owner did the exhaust swap and the second owner put the silencer in it. I was looking at taking it out last night, but sadly it's tack welded in. At the time I didn't think about taking a grinder to it and grinding a 1/8 inch off. Might do that tonight. Here is a pic. Sorry, it's the only one I have right now that shows the exhaust.
    Last edited by svynx; 08-22-2008 at 05:26 AM.

  5. #4
    Registered User CJ05's Avatar
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    I never heard of a silencer causing a drop in HP. However i have heard that in some applications a silencer can improve on low-end torque.
    Bugeye Mafia #231 - 2002 WRB - sold Dec 31, 2009
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    Proud owner of 99 RS coupe with EJ205 engine and tranny swap.

  6. #5
    Registered User Decon's Avatar
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    me i like mine loud so since i got my new exhaust the silencer had been packed away if i ever sell the exhuast to have it for the sale. But like said about if it did hurt the car they would make/include them.

  7. #6
    Subaru Newb MainFrame's Avatar
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    Yeah, the silencer shouldn't cause as much back pressure as the stock exhaust, so I don't see how it could hurt anything.


    I had a stealthback exhaust (stock muffler) with a cutout and I didn't really notice much of a HP gain from having the cutout open, so I doubt the silencer drops much HP. Seems like the higher power car the more of a difference it would make.. and the less you would need those few extra HP.

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