05-28-2013, 08:46 AM | #1 |
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N55 335 Engine sounds "harsh"
Prior to purchasing my car i read a lot of praise for the "sweet" sound of the N55 engine.
I only had an opportunity to test drive an M135i hatch and was really happy with the sound. Albeit with some synthetic audio assistance. My dealer convinced me that the 335 was exactly the same. Well i have to say, i am not particularly impressed with the flat metallic whine of the 335i's engine, it's nothing like the M135i. There is no "sweet" note. It sounds harsh, simple as that. I tried adding the M Perf exhaust and that made little to no difference. What's most upsetting is that the cheaper 1 series sounds better, has more HP, more TQ. I just don't get that!! If it just sounded better it would be a perfect car in my opinion. Does anyone else feel the same way? ***For clarification i am referring to the sound of the car from the driver's perspective, i have not heard my car from the outside driving by as yet. Last edited by djw007; 05-28-2013 at 08:54 AM.. |
05-28-2013, 09:49 AM | #2 |
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yeah from the inside it sounds like the engine is being overworked under heavy driving. From outside the exhaust note is pretty sweet, even on the stock sys
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05-28-2013, 11:47 AM | #3 | |
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05-28-2013, 12:11 PM | #4 | |
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Try doing the solder (remove insulation on the silencer, solder all the holes in the exhaust tubes ) mod on your stock exhaust, it adds no drone and the sound is just gorgeous. 2x as loud and 3x times as manly! |
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05-28-2013, 03:30 PM | #5 |
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The M135 has the fake active sound through its speakers which is probably why your N55 doesn't sound anything like it.
Alan
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05-28-2013, 03:54 PM | #6 |
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05-28-2013, 03:55 PM | #7 | |
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05-28-2013, 04:04 PM | #8 | |
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05-28-2013, 05:54 PM | #9 |
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Looks like most people never heard of this thread.. Works like a charm, costs 60 us to do and will probably be the most satisfying thing you ever do!
http://www.f30post.com/forums/showthread.php?t=819125 |
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05-28-2013, 06:14 PM | #10 |
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I disagree. I love the sound of my car, its one of my favorite things about it. I liked it even before the mperf. exhaust and power kit. Now its much better of course.
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06-06-2013, 09:30 AM | #11 |
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I just unplugged the actuator (it was making a stupid squeaking noise and don't want to go to the dealer just for that) and both exhaust pipes are always open. Sounds a bit louder and throatier. Simple mod that's free.
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06-06-2013, 09:57 AM | #12 |
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how do you unplug?
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06-06-2013, 10:33 AM | #13 |
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Turn the car off (when off the actuator is open, which is what you want).
Slide under the drivers side rear muffler. Somewhere near the rear tire around the muffler under the car you'll see an electrical plug connection. Just unplug it and tie it with some wire or something, or just let it hang if you want. It's pretty obvious once you get under there. I can take pics tonight or tomorrow if you need, but I don't think you'll need them once you slide under there. |
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06-06-2013, 11:30 AM | #15 | |
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As for as why BMW does this? My guess is to keep the noise down when not under full throttle. When you're putting around the flap closes to the exhaust note isn't as loud, but get on it and they both are open. I can't think of any other reason to only use one of the exhausts under partial throttle, but I'm not BMW expert. |
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06-06-2013, 12:08 PM | #16 |
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I was always underwhelmed by the sound of the car from the inside. Once a buddy of mine drove it hard while I stood outside, I couldn't believe how beastly it sounds. The wastegate 'whoosh', the overrun burble, and the sweet revving of the straight 6 adds up nicely.
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06-06-2013, 12:13 PM | #17 | |
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06-06-2013, 12:15 PM | #18 | |
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06-06-2013, 01:17 PM | #19 |
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Regarding the disconnect of that plug, I think it will throw some shadow codes. I removed the U shaped spring clip and wired the exhaust flap open. I had it in for about a week and it sounded really good. Took a road trip with the family and there was a horribly annoying drone doing 55-65 mph. As soon as we got to our destination I put the clip back in cause I couldn't stand the drone. Glad I brought the clip with.
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06-06-2013, 01:18 PM | #20 | |
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06-06-2013, 01:49 PM | #21 | |
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With the car off, it should be open, when the car is warmed up and idleing it should be closed (unless you've pulled the plug to keep it open) |
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06-06-2013, 01:51 PM | #22 | |
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