11-25-2013, 06:39 AM | #1 |
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Throatier sound
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11-25-2013, 06:54 AM | #2 |
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I have a 13' 328i x-drive also but M-Sport. TBH I never noticed if the exhaust notes changes in sport or sport +. The exhaust seems muted all of the time except during cold start which is a little raucous. I'll keep a listen out for the change in sport and report back.
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11-26-2013, 01:22 PM | #3 |
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I can feel a sound difference between modes. There is a noticeable burble on gear changes in Sport when accelerating hard, and it's just louder in general. Not to say it's LOUD, just louder. But this is probably not due to any change in the exhaust system. It's just that Sport revs higher and quicker, which obviously pushes more exhaust gas through the pipes, making them noisier.
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11-26-2013, 01:37 PM | #5 |
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It has a flap.
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11-26-2013, 03:51 PM | #8 |
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Any proof to that claim? No word of such a technique ever being used on the F30.
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11-26-2013, 04:15 PM | #9 |
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When you look under the car is there a servo-actuated flap on one of the exhaust pipes? I have a 335 so don't know what the 328 looks like underneath. I did the M-Performance exhaust (which also came with a actuated flap that I defeated). Sounds great with the flap locked open!
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11-26-2013, 04:50 PM | #10 | |
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11-26-2013, 04:54 PM | #11 |
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Cool! So then it *should* be possible to do that "golf tee" mod on the 328 and keep both pipes open. On my old 2009 E90 I used a ball bearing in the vacuum hose and on the current F30 I pulled the spring clip and used baling wire to hold the flapper open (so as to not throw codes for disconnecting the actuator).
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11-26-2013, 07:47 PM | #12 | |
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11-26-2013, 08:23 PM | #13 |
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has anyone been able to find anything on the audio enhancement? my salesman was eluding to this when comparing the '13 to '14
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11-27-2013, 10:05 AM | #15 |
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theres no audio enhancement for the 328, with that being said i dont think theres a difference in sound between comfort and sport
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11-27-2013, 12:32 PM | #16 | |
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11-27-2013, 01:03 PM | #17 | |
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11-27-2013, 03:52 PM | #18 |
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On my 335i, the flap blocks one exhaust pipe (driver side) so all the exhaust is pushed out the other. The actuator opens when you stomp on the gas (and probably during other times). Most driving the 335's have a sooty passenger side pipe and clean drivers side. Golf tee mod (as it's called) keeps the drivers side pipe open all the time. Sounds better (on acceleration and the burble when shifting/decelerating) and keeps both pipes looking the same.
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11-27-2013, 07:32 PM | #19 | |
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11-27-2013, 11:01 PM | #21 |
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Adio enhancement, WTF! Seriously? I would expect this from maybe Kia, but BMW, the ultimate driving machine. Maybe I bought the wrong car, should I have purchased the S4.
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11-27-2013, 11:11 PM | #22 | |
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