BMW M3 / M4 Sound and Exhaust System: Deep Dive and Interview

[pkimM3r]

Originally Posted by V1.47fan

I hope the guys in charge of this exhaust system are better than the BMW engineers that for decades cant figure out how to solve the rod bearings problems or give me a simple oil cap for the S65 engine that doesnt leak. Lol

my damn oil cap leaks too!

[Thurman Murch]

oil only leaks if you have too much oil inside...

the oil level sensor is tricky even the one in the f3/8x where you have to be stationary on a flat plane

rod bearing problems minimal compared to hpfp, clogged injectors and vanos bolt issues with any of the newer turbo engines

s63 is having heat warp issues was told by bmw service to avoid this engine out of warranty

[Franko's B]

Why does this sound like my 335?

[parky1215]

I will most likely remove secondary cats and replace silencer with x pipe.
Will post how that sound when I get my car later this year.

[Lups]

Originally Posted by parky1215

I will most likely remove secondary cats and replace silencer with x pipe.
Will post how that sound when I get my car later this year.

You like your neighbors, Parky? I don't like mine And the spouse says I can't be mean, cause then he has to take the kids to parks to play.

I still don't understand why a car should be loud, purr, nice, low, not loud purr would be best.

Okay, last was a lie.

[parky1215]

Originally Posted by Lups

You like your neighbors, Parky? I don't like mine And the spouse says I can't be mean, cause then he has to take the kids to parks to play.

I still don't understand why a car should be loud, purr, nice, low, not loud purr would be best.

Okay, last was a lie.

My neighbors are mostly university professors.
I am sure they are already awake before I cold start my car 8 in the morning
If not, oh well, I don't care.

[TunedM2C]

Originally Posted by Lups

You like your neighbors, Parky? I don't like mine And the spouse says I can't be mean, cause then he has to take the kids to parks to play.

I still don't understand why a car should be loud, purr, nice, low, not loud purr would be best.

Okay, last was a lie.

"If you can't hear me coming what's the f'ing point?!"-Jesse James

Plus, I like scaring small children on their way to school.

[IMrMark]

Originally Posted by Strongbark

"Plus, I like scaring small children on their way to school.

I live right next to three schools, one of which likes to use my street as a cut-thru, so this is key for me as well

[Lups]

Originally Posted by Strongbark

"If you can't hear me coming what's the f'ing point?!"-Jesse James

Plus, I like scaring small children on their way to school.

I'm already waiting to make the school runs in this, all the other mums drive white Prius's and I do want to avoid the social scene here. As for the sound, my music collection usually is making sure no one can claim they didn't hear me coming.

[Lups]

Originally Posted by parky1215

My neighbors are mostly university professors.
I am sure they are already awake before I cold start my car 8 in the morning
If not, oh well, I don't care.

Yeah, they tend to be awake in the most unusual hours, such as mornings at sun rise. Oh well Parky, we will manage with anything. As long as Elsa is happy, and I avoid walking to a Prius by accident because I couldn't tell the difference in the sounds.

[swamp2]

Originally Posted by Ducfan

Now let's talk about a real hard to swallow pill. Would you still change the exhaust system? IMO we know that most exhaust only swaps do not really improve performance...it's for sound. And it will clearly be possible to alter the sound in the cabin electronically (coding or whatever) so if you still say yes to a different physical exhaust are you not really saying that what you care about is what other people hear? Sounds vain to me.....

Please don't get all upset with me. These are just thoughts and odds are I will still change the exhaust on my car in spite of what I just wrote....old habits and beliefs die hard.

Good post. However, modification of the exhaust does not only alter exterior acoustics but both interior and exterior. Of course when one really want to enjoy exhaust acoustics, it's tunnel, windows down and redline, pure bliss in an M3 with a good cat back exhaust. I get your point though, there is an element of ostentatiousness with an exhaust mod.

[Brosef]

unless exhaust systems are much cheaper this time around (i.e. not $2,500+), I'm not dropping the coin. reason is simple - I'm not interested in this car for the sound.

on the e90, an aftermarket exhaust took an amazing sounding motor and made it sound even more orgasmic. well-worth the $2-3k price of admission to showcase how special the S65 V8 was.

on the F80, even with an aftermarket exhaust it still won't sound great (I mean truly great... it will certainly sound good). to me, the stock exhaust will be good enough. I'll put the cash toward more track days.

[pkimM3r]

sounds pretty good but i too dont like that upshift crap.

[pkimM3r]

Originally Posted by Thurman Murch

oil only leaks if you have too much oil inside...

the oil level sensor is tricky even the one in the f3/8x where you have to be stationary on a flat plane

rod bearing problems minimal compared to hpfp, clogged injectors and vanos bolt issues with any of the newer turbo engines

s63 is having heat warp issues was told by bmw service to avoid this engine out of warranty

too much oil? i do an oil change every 5000 miles. 8.5L. never had my dipstick read low or high. dont think it has to do with too much oil.

[ASAP]

Originally Posted by Thurman Murch

oil only leaks if you have too much oil inside...

the oil level sensor is tricky even the one in the f3/8x where you have to be stationary on a flat plane

rod bearing problems minimal compared to hpfp, clogged injectors and vanos bolt issues with any of the newer turbo engines

s63 is having heat warp issues was told by bmw service to avoid this engine out of warranty

Straight LOL right there... comparing potentially catastrophic internal damage to worn out accessories / maintenance items.

[ASAP]

Originally Posted by Franko's B

Why does this sound like my 335?

Why would it not? It's a near identical engine configuration with a slightly different exhaust.

[Rene007]

think the sound is very good for a turbo - as he already wrote that one engines with and without turbo can not compare.

Soundclip from Nürburgring

[Vbcarguy]

Originally Posted by JAM3S

The car farts just like a Honda with a coffee can on the back of it.

Some of you drink the BMW Marketing diarrhea straight from the bottle it seems.

Agree !! Sounds awful .

[Rupes]

Originally Posted by Rene007

think the sound is very good for a turbo

This is like saying, "he runs fast for a guy with one leg."

Lets just admit right now the car sounds like crap. The good news is, as other manufacturers turbo their cars, they'll all sound like crap. Turn your head away from the screen, stop looking at the pretty car, the roundel, and just listen... Tell me, honestly, you like what you are hearing (liar!).

Everyone so focused on this, but BMW will put some fake noise in the car to make it sound nice so you'll be none the wiser.

[Lups]

Originally Posted by Rupes

This is like saying, "he runs fast for a guy with one leg."

Lets just admit right now the car sounds like crap. The good news is, as other manufacturers turbo their cars, they'll all sound like crap. Turn your head away from the screen, stop looking at the pretty car, the roundel, and just listen... Tell me, honestly, you like what you are hearing (liar!).

Everyone so focused on this, but BMW will put some fake noise in the car to make it sound nice so you'll be none the wiser.

People who don't like turbos haven't heard a similar sound in a different setting. The shriek is always good.

Sorry, I'm out of coffee again.

[Denk]

I'd be tempted to remove the valves for 100% non-restriction always or MPE. I foresee a lot of hack jobs on this exhaust right off the bat.

[aus]

It's too late to read the whole thread now, but all that BMW blah blah blah, and they forget to mention it uses speakers inside the car for the exhaust sound???

At least the drive by and acceleration runs are decent. First coding mod is DELETE COLD START!!!

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