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  1. #1
    New Member ts atseif's Avatar
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    Power loss from muffler delete?

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    Hey everybody.

    For those of you who have done muffler deletes, specifically without any other power mods done (i.e., stock), has anybody experienced any horsepower/torque/throttle response loss?

    I have read a few posts regarding the topic as well as YouTube comments from muffler delete sound clips, and couldn't find anything conclusive.

    Thanks for your time.
    -Ivan

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    This is a hotly debated topic in naturally aspirated engines but not really relevant for turbocharged engines.

    The turbo will typically perform better with the most open exhaust possible but for our cars larger pipe diameter and even a cat delete do not yield much improvement due to the inherent restriction of the stock turbo.
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  3. #3
    New Member ts atseif's Avatar
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    Quote Originally Posted by redmoe View Post
    This is a hotly debated topic in naturally aspirated engines but not really relevant for turbocharged engines.

    The turbo will typically perform better with the most open exhaust possible but for our cars larger pipe diameter and even a cat delete do not yield much improvement due to the inherent restriction of the stock turbo.
    Right, that's exactly what I thought. Turbo needs bigger exhaust to perform better. With N/A, you would need more fuel, air to accompany the free'er flowing exhaust.

    Let's be clear, I do not want more power , more power means AP, means possible warranty issues should arise. Just a louder exhaust without an actual power penalty

  4. #4
    Member 180 Rep Points Clit_Beastwood's Avatar
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    Quote Originally Posted by ts atseif View Post
    Right, that's exactly what I thought. Turbo needs bigger exhaust to perform better. With N/A, you would need more fuel, air to accompany the free'er flowing exhaust.

    Let's be clear, I do not want more power , more power means AP, means possible warranty issues should arise. Just a louder exhaust without an actual power penalty
    If you do a straight muffler delete it shouldn’t do anything other than sound gross - though it might change the delivery of the power so you don’t feel a “kick” as much as a slow build if the muffler was really that restrictive.

  5. #5
    New Member ts atseif's Avatar
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    Quote Originally Posted by Clit_Beastwood View Post
    If you do a straight muffler delete it shouldn’t do anything other than sound gross - though it might change the delivery of the power so you don’t feel a “kick” as much as a slow build if the muffler was really that restrictive.
    "Sound gross"? What do you recommend? I'm trying to be cost efficient and figured this was a good way to go about it. On the WRX I had , I installed axleback deletes. I personally thought they sounded great.

    TBH, listening to clips of FiSTs with deletes, don't exactly inspire me, but I thinkit still sounds better than stock, and is a very affordable alternative to cat back.


    So, what you're saying is, throttle response would be reduced? That would suck.

  6. #6
    Member 205 Rep Points Ford ST's Avatar
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    Can you live with the exhaust drone everyday? Realize you do have a resonator in the front as well?

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  7. #7
    New Member ts atseif's Avatar
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    Quote Originally Posted by Ford ST View Post
    Can you live with the exhaust drone everyday? Realize you do have a resonator in the front as well?
    Yes and yes. I went through the whole, "res delete, muffler delete, res AND muffler delete" scenarios.
    I wouldn't want to do both, as I think that's heavily drone prone. Doing just the res doesnt yield much results according to what I've read/heard via YouTube.

    The 3rd option that I've been playing around with is deleting the res and swapping out the stock muffler for a glasspack type. But I think the res does more for drone reduction than the muffler, considering its placement on the car.

    A 4th option was deleting the muffler and swapping the stock res for a Vibrant res. But if I'm going that route, I might as well start with just the muffler delete and go from there.

    Of course the 5th option is to lay down some serious "coin" for the Cobb catback (IMO, the best sounding of the aftermarket setups). But then there's the diameter of the piping that has to be considered, and do I need a tune (not going there). Muffler delete seems like the simplest and cheapest route that will yield considerable results.

    As for drone specifically, I can live with some. My wrx had a decent amount with deletes on the highway at 70+ mph, and I got used to it.

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    Get an aluminized 3" mbrp with a discount code

  9. #9
    Member 180 Rep Points Clit_Beastwood's Avatar
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    Quote Originally Posted by ts atseif View Post
    Yes and yes. I went through the whole, "res delete, muffler delete, res AND muffler delete" scenarios.
    I wouldn't want to do both, as I think that's heavily drone prone. Doing just the res doesnt yield much results according to what I've read/heard via YouTube.

    The 3rd option that I've been playing around with is deleting the res and swapping out the stock muffler for a glasspack type. But I think the res does more for drone reduction than the muffler, considering its placement on the car.

    A 4th option was deleting the muffler and swapping the stock res for a Vibrant res. But if I'm going that route, I might as well start with just the muffler delete and go from there.

    Of course the 5th option is to lay down some serious "coin" for the Cobb catback (IMO, the best sounding of the aftermarket setups). But then there's the diameter of the piping that has to be considered, and do I need a tune (not going there). Muffler delete seems like the simplest and cheapest route that will yield considerable results.

    As for drone specifically, I can live with some. My wrx had a decent amount with deletes on the highway at 70+ mph, and I got used to it.


    It's usually better to either do something right or not do it at all. Cutting off the muffler sounds exactly like you cut the muffler off. It doesn't sound like an exhaust system, it just sounds like a bastardized stock exhaust.

    If you already have in your head that the Cobb is the sound you want, you won't be satisfied with fart piping your car - either get the Cobb you want or leave it alone until you can afford to do so. No other solution you nickel and dime is ever going to make you happy so long as your ideal sound is the Cobb. You'll always wonder "what if". You know what you want to do, just save up your money and do it. Do not worry about the diameter of the Cobb exhaust unless you plan on going big turbo; this information is plainly available on the forum if you look around.

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    Member 180 Rep Points Clit_Beastwood's Avatar
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    Quote Originally Posted by Meowoosh View Post
    Get an aluminized 3" mbrp with a discount code
    heh but he *did* specify no drone :P


 
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