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  1. Replies
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    I bought mine in the second group buy. I don't...

    I bought mine in the second group buy. I don't have anything to compare it with here in CH, but it does sound an aweful lot like Andrew's videos and it's damn loud. I'm looking for ways to quiet it...
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    OK, here's the theory: A "pure" helmholtz...

    OK, here's the theory:

    A "pure" helmholtz resonator is just an acoustic capacitance (the cavity) and an acoustic inductance (the perforations). The imdepance and inductance combine to form a...
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    Have I totally misunderstood what resonators are?...

    Have I totally misunderstood what resonators are? The Magnaflow racing mufflers are exactly what I understood our resonators were: a perforated section of pipe surrounded by a larger section of pipe...
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    the problem this guy was having was with the O2...

    the problem this guy was having was with the O2 sensors. The fix was to disable the post cat sensors in the ecu--two other guys posted that they had to do the same.

    Claus on this board also had...
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    I would very much appreciate if you could. I read...

    I would very much appreciate if you could. I read on the M5 forum that one person was having lots of trouble with the engine warning light coming on. If you could ask if there was any ECU...
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    I was wondering about those too. Are you running...

    I was wondering about those too. Are you running the Supersprint cats? Any problems with the emissions?
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    The problem with the clips is that all the ones I...

    The problem with the clips is that all the ones I have seen are made with video cameras that have auto adjusted mic volume--so you can't really get a sense for loudness.

    As audio is one of my...
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    any chance you're in LA in late Dec? I'd love to...

    any chance you're in LA in late Dec? I'd love to hear a sample.
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    Eisenmann vs Meisterschaft

    So reading the posts on both, it seems that the Eisenmann is significantly quieter at low revs and throttle. Anyone here heard both and can verify? I vastly prefer the Ferrari sound to the American...
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