Question on a muffler delete system
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This is a discussion on Question on a muffler delete system within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Does anyone know if the nameless muffler delete system increases HP/torque? Obviously just buying the system since its cheap. Figured ...

  1. #1
    Registered User chrismartin3391's Avatar
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    Question on a muffler delete system

    Does anyone know if the nameless muffler delete system increases HP/torque? Obviously just buying the system since its cheap. Figured if Im going to drive a Subaru I need to have the Subaru sound. Eventually will upgrade to a full turbo back but until then I have the namless axleback muffler delete. Was going for loud and got what I wanted lol. All I'm wondering is if I possibly gained anything from it? High end feels like it picks up a tad more but no major difference. Any thoughts opinions? Appreciate it!

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    zax
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    There will be little or no increase in effective torque.
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    Registered User kh202's Avatar
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    Question on a muffler delete system

    Edit; sorry misread op

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    Registered User wreckingball man's Avatar
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    Replacing the stock mufflers should be good for a few extra Hp. But that's about it. Marginal..

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    Simply a flat-four symphony. No gains whatsoever.

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    zax
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    Quote Originally Posted by wreckingball man View Post
    Replacing the stock mufflers should be good for a few extra Hp. But that's about it. Marginal..
    You can't possibly prove this. The gains would be within the uncertainty of dyno error.
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    Registered User wreckingball man's Avatar
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    Quote Originally Posted by zax View Post
    You can't possibly prove this. The gains would be within the uncertainty of dyno error.
    Is that not Marginal? meaning; to be sitting on the edges, the change can't be empirically proven/expressed/measured? What you said is a lot clearer though lol.

    Question! Why do mufflers see a bigger gain on NA platforms? like 5-10 extra Hp...unless of course that's simply not true. I've seen several videos showing before and after dyno pulls with that kind of difference in power with just muffler swaps. Also, some local drag racers were talking about the same thing, also claiming you could get about that much of a gain. What's you experience?

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    Registered User chrismartin3391's Avatar
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    Its odd. Ive heard a few different things. But the test would be within the dyno results. Just didnt know if maybe someone on here wouldve already had the same mod and actually had theirs dyno'd.. But its like i said. It feels a tad better. But nothing to brag about. The sound of the 4banger band is what I was looking for.

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    zax
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    Quote Originally Posted by wreckingball man View Post
    Is that not Marginal? meaning; to be sitting on the edges, the change can't be empirically proven/expressed/measured? What you said is a lot clearer though lol.

    Question! Why do mufflers see a bigger gain on NA platforms? like 5-10 extra Hp...unless of course that's simply not true. I've seen several videos showing before and after dyno pulls with that kind of difference in power with just muffler swaps. Also, some local drag racers were talking about the same thing, also claiming you could get about that much of a gain. What's you experience?
    Easy. NA cars don't have a giant obstruction situated between the muffler and heads (read: turbocharger). In any car, the VE of the motor is nothing more than the efficiency in moving air into and out of the motor. In an NA motor, the muffler may be a restriction. For a Turbocharged car, it's more likely the turbo bears the burden of restriction.
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    Registered User wreckingball man's Avatar
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    *Lightbulb. thanks lol.

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    Quote Originally Posted by zax View Post
    For a Turbocharged car, it's more likely the turbo bears the burden of restriction.
    That being said... the turbo's VE is directly tied to the pressure differential pre and post turbine. So, reducing the back pressure does increase the differential and thus improves the VE of the turbo... which in turn improves the VE of the motor as a whole. Soooo....
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    Subaru Newb MainFrame's Avatar
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    Quote Originally Posted by wreckingball man View Post
    Is that not Marginal??

    Negligible.



    I would say, it will make a difference.. just not a big enough one to be able to measure.

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    In order for you to make real power gains you have to change the diameter of the pipeing, although anything that releaves backpreasure will help the turbo spool faster which in turn should create HP and TQ.
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    Quote Originally Posted by ronzonothebugeye View Post
    In order for you to make real power gains you have to change the diameter of the pipeing, although anything that releaves backpreasure will help the turbo spool faster which in turn should create HP and TQ.
    The restriction in WRX exhausts are not the mufflers, plain and simple.
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    Quote Originally Posted by ronzonothebugeye View Post
    In order for you to make real power gains you have to change the diameter of the pipeing, although anything that releaves backpreasure will help the turbo spool faster which in turn should create HP and TQ.

    A system only flows as well as its greatest restriction.. and the diameter of the pipe doesn't really have that much to do with it, there are a lot of other things going on in the exhaust system that create restrictions.

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