Cold start: 95 db at approx RPM idle
Warm start: 85 db at approx RPM idle
Warm idle: 55 db
mph Highway cruise (when not droning): db
mpg highway cruise (when droning): db
Peak drone, driving up-hill partial throttle around RPM: 70 db
Max interior sound volume under full throttle: 72 db
Again, my car is a manual transmission (6MT) i 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 ( db). 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 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.
Join Date: Nov
Originally Posted by Bam
Wouldn't the m exhaust work?
Wife's Car: X4M Competition, Alpine White on Black Alcantara and Biege
Current Car: F80 M3CS, SMB, DCT, ZEC, MPE
Recently Departed: F87 M2C, LBB, ZEC, 6MT (Euro Delivery Aug. 29, , totaled by an idiot in a Camry who then ran from the scene)
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If you are on a tight budget, don't mod because a tight budget usually results in cheap looking and sounding mods.
I personally don't like muffler deletes, don't like the sound. Get a nice aftermarket exhaust for about $ more, it won't make your $ BMW sound like a $ shitbox.
Gone but not forgotten: 07 E90 I, 04 UA6, 95 E36, 04 EP3, 16 S EB, 14 F30 I Stg 1, 08 E90 I
VRSF Stainless Steel Muffler Delete for BMW i/xi/is E90/E91/E92/E93 N54 & N55
VRSF Stainless Steel Muffler Delete
For your BMW i, xi and is with the N54 & N55 Engine
We are proud to introduce our VRSF Stainless Steel Race Muffler Delete for the E90/E91/E92/E93 BMW i/xi/is. This muffler delete is one of the most cost effective exhaust modifications available for your N54 & N55! By eliminating the incredibly restrictive OEM muffler, back pressure is reduced significantly which results in faster spool, an increase in power & a more aggressive exhaust note.
This product was designed and engineered for to fit on both the N54 & N54 version of the i and is in both RWD & AWD configurations. The difference in both power and sound are be noticeable the moment it is installed! Please note that cutting of the factory exhaust is required and that we include everything necessary for installation including installation hardware. Please note that these tips do not require install hardware.
- Hand made from mandrel bent, tig welded grade stainless steel.
- Polished 90mm tips included.
- Smooth radius bends to decrease turbulence and increase flow.
- Quicker spool and improved exhaust note.
- Fits RHD and LHD models with no modification necessary.
- VRSF Lifetime Warranty against defects and fitment.
This item fits the following BMWs:
E90/E91/E92/E93 BMW i, xi, is N54 & N55
Note: Fits both Left Hand Drive & Right Hand Drive Models
|Dimensions||26 × 12 × 6 in|
Delete bmw muffler
Join Date: Mar
Originally Posted by xenoz
wanna hear them j-pipes
i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI
Thread: muffler delete do or don't???
Ive had my muffler delete for around 8 months now and let me tell you, i have no regrets. If you want a muffler delete it means that you want your car to be loud, so obviously all these comments about it being loud don't effect your decision. As for those who say its too loud and gets annoying, well its all due to their own opinions. Personally i like it because its deep rumble makes the engine sound beast, backfire is nice when you're slowing down, and it makes burnouts that much better.
Its all down to what you want, i say do it. Cost is cheap, maybe $ with tips. I got mine done for $85 because the shop didn't have the tips i wanted, But I'm still looking.
Maybe if you ask nice enough and stay far away from my mom ill post a video of the sound later on.
BMW E36 i: July - Nov. RIP
BMW E30 Dec. - April
BMW E34 i: April - Nov.
Audi B5S4: January - May
BMW E83 X3: June - Present
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Without stopping for a second, the man drove the trunk up to the eggs. Katya gasped, but immediately moved her hips to meet the buzz. One push, another, and another.