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BMW 3-Series (E90 E92) Forum
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Pros and Cons of doing a muffler delete
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03-17-2010, 07:04 PM | #1 |
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Pros and Cons of doing a muffler delete
Im really looking forward to doing a muffler delete on my e90 335i but don't want to make a mistake and regret doing so.
Can anyone with experience with one tell me how you like it? |
03-18-2010, 01:01 AM | #3 |
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I just answered your other muffler delete thread, but here are the pros/cons.
Pros: 1. mean, powerful tone without sounding "tinny" or "ricey" at all 2. inexpensive 3. no mufflers hanging below the rear bumper (very clean appearance) 4. shed 25+ lbs if replacing with straight pipe and tips (use nice tips!!) Cons: 1. drones badly between 60-75mph on e90 335 (not good sound) 2. cut up your stock exhaust 3. doesn't sound like an exotic or "German" car, IMO If you do it, make sure the exhaust shop uses real stainless steel pipe and tips, or it will rust and look like cr*p quickly (even without snow). |
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03-18-2010, 01:50 AM | #4 |
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Well, unless he coats the pipe. But that probably will come out more expensive. After muffler delete look into some catless dp's or even catted. Might add a little bit more of a better sound to it.
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03-18-2010, 02:44 AM | #5 |
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Drives: '08 E90 335i, '99 E36 M3
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The con is that apparently it's really loud and obnoxious but I haven't heard one in person yet. The pro is that it apparently sounds really good. Obviously these are conflicting opinions.
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03-18-2010, 02:39 PM | #6 |
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I LOVE MINE!!! The sound is not that loud at all... I get compliments on the sound all of the time... Inside the car it's not that loud... There is a tiny bit of drone for a very narrow part of the RPM band under certain loads but it is very quiet on the freeway.... Click the link in my sig for my video...
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03-18-2010, 03:09 PM | #7 |
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it sounds good when not cruising on the freeway... so they are not conflicting. it does sound obnoxious when your droneing at 60 on the freeway...
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03-18-2010, 03:10 PM | #8 | |
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03-18-2010, 03:13 PM | #9 |
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Even expensive aftermarket exhausts will sound like crap at 60 on the freeway with an AT. Best thing you can do is put the car in DS or drop it down a gear.
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03-18-2010, 06:33 PM | #12 |
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+1
OP I did the Muffler Delete on my e92 and ran it for about 9 months. Sounds good. It's pretty mean. And it's pretty loud. Not quite obnoxious IMO. Not bad for the money but it can get a bit raspy in the higher end of the RPM band. It also drones pretty bad on the highway but hey - you get what you pay for. If you want to be loud then I'd say go for it!
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03-19-2010, 02:09 AM | #13 |
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I forgot to mention that I have a MT (6 speed), and the drone is pretty bad on the highway unless you go below 60 or above 80. When I have others in the car (esp back seat) I try to drive outside the RPM range of the drone.
You do get used to it, but the whole point of these cars is NOT to settle on anything less than "ultimate." I often wonder if a very simple H-pipe right behind the rear axle (ie. connecting pipe between the straight pipes) would break up the pipe length and lessen the drone to acceptable levels. I've been tempted to try it, especially when faced with spending $1000+ on an exhaust. If you can get the pipes for $40/side (great price), you might consider the H-pipe option and see what happens. <nudge nudge> |
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03-19-2010, 02:27 PM | #14 | |
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03-21-2010, 01:36 PM | #16 | |
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Anyone close to Sacramento with an e90 muffler delete? I'd love to hear it. In the end, I want the exhaust to be louder but NO or very little drone. |
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03-21-2010, 03:43 PM | #17 | |
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03-21-2010, 04:28 PM | #18 |
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I believe you. Problem is, I also have an e92.
It makes me wonder if I should find an unused e90 resonator for sale. That seems so weird though... considering going from an xpipe to a resonator. Does the resonator share the chamber inside? Does it actually crossover or are both pipes completely separate? |
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03-23-2010, 02:07 PM | #19 |
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Decibel readings for Muffler Delete
Measurements were taken outside, approximately 1 meter back, between the two mufflers. All measurements are in decibels (dB).
Outside Measurements Cold start: 95 db at approx 1200 RPM idle Warm start: 85 db at approx 600 RPM idle Interior Measurements Warm idle: 55 db 55-80 mph Highway cruise (when not droning): 64-65 db 60-75 mpg highway cruise (when droning): 68-69 db Peak drone, driving up-hill partial throttle around 2400 RPM: 70 db Max interior sound volume under full throttle: 72 db Again, my car is a manual transmission (6MT) 2009 335i x-Drive Sedan (e90 AWD). My only mod is muffler delete, so the stock resonator and cats are all still in place. The cold start measured louder than I thought it would, and the inside measurements show how great the stock acoustical treatments are ( -30db). I've seen people physically jump and/or turn around when my cars starts up, warm, so I knew it was somewhat loud. I will have my wife start the car and take peak measurements soon. As you can see, the drone adds between 4-6 decibels (db) during highway cruising, so it's very noticeable when it kicks in and starts resonating. For reference, every 3 db represents a doubling of acoustic pressure (loudness). However, with that said, the overall interior sound level stays pretty low overall (70 db or less), especially for a performance car. Thus, it's not really all that loud at all in terms of absolute measurement. How we interpret it subjectively is going to differ vastly, but I wanted to give people some facts to mull over. Unfortunately, I didn't have my sound level meter when my car was stock. |
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03-23-2010, 02:40 PM | #20 | |
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03-23-2010, 02:59 PM | #21 | |
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