Question about the very distinct rumble from a stock BMW muffler
#1
Question about the very distinct rumble from a BMW muffler.....ok this is OT sorry
This is the sound I would like and I hoped removing the resonator would do this but I have been told it would not. The distinct sound that the bimmer has is it because of the firing order of the inline six or is the muffler responsible for the nice purr. The sound is good a little rumble but not too much
#2
i'm sure it has to do with the technology in the muffler (and maybe some with the engine). I know that they have a dual chamber muffler (where only one outlet opens under low RPM's and the other after a certain RPM's. But if you notice, a 330 sounds alot more 'throatier' than a 325/323. It must be that double VANOS engine
#4
The bmw mufflers are dual chambered like the skyline/2000+ maxima ones are?
BTW. I have a full cat back and the 2000 muffler. Mine has a real nice low rumble at idle.
Also, the tone if the sound is greatly affected by the displacement of the engine also.
BTW. I have a full cat back and the 2000 muffler. Mine has a real nice low rumble at idle.
Also, the tone if the sound is greatly affected by the displacement of the engine also.
Originally posted by NickStam
i'm sure it has to do with the technology in the muffler (and maybe some with the engine). I know that they have a dual chamber muffler (where only one outlet opens under low RPM's and the other after a certain RPM's. But if you notice, a 330 sounds alot more 'throatier' than a 325/323. It must be that double VANOS engine
i'm sure it has to do with the technology in the muffler (and maybe some with the engine). I know that they have a dual chamber muffler (where only one outlet opens under low RPM's and the other after a certain RPM's. But if you notice, a 330 sounds alot more 'throatier' than a 325/323. It must be that double VANOS engine
#6
Jeff is right, there is no replacement for displacement. That's why all those 1.6L civics/4 bangers sound aweful under WOT with the fart can mufflers.
If you want rumble, go with a flowmasters...i know my setup sounds MUCH different then a greddy or other conventional setup.
If you want rumble, go with a flowmasters...i know my setup sounds MUCH different then a greddy or other conventional setup.
#7
Originally posted by Craig Mack
Jeff is right, there is no replacement for displacement. That's why all those 1.6L civics/4 bangers sound aweful under WOT with the fart can mufflers.
If you want rumble, go with a flowmasters...i know my setup sounds MUCH different then a greddy or other conventional setup.
Jeff is right, there is no replacement for displacement. That's why all those 1.6L civics/4 bangers sound aweful under WOT with the fart can mufflers.
If you want rumble, go with a flowmasters...i know my setup sounds MUCH different then a greddy or other conventional setup.
#8
Sound better? That's pretty subjective. But the motor config could make a difference(valvetrain doesn't really make a difference). Since all of the exhuast is one side for the inline 6, it could be different. But in general, displacement is probably one of the biggest factors. I suppose you can make a big displacement sound crappy, but it's next to impossible to make a small displacement 4 cylinder sound deep and nice.
You have to remember, yes that bmw is only 2.5 liters but it's still a 6 cylinder.
There's nothing like a small displacement V12 Ferrari at full song. I think they are only about 5 liters or so.(the older ones anyway)
You have to remember, yes that bmw is only 2.5 liters but it's still a 6 cylinder.
There's nothing like a small displacement V12 Ferrari at full song. I think they are only about 5 liters or so.(the older ones anyway)
Originally posted by MaxSE98
then why does an inline 2.5 from the bimmer sound better then a maxma with a 3litre ?i personally think it has to do with the valvetrain setup first, then it moves to the way the exhaust hangs the thickness of the tubing all the way back. ive played alot with my exhaust and ive got a nice burble at low rpms that i got by securing my exhaust setup to the frame more. so there )
then why does an inline 2.5 from the bimmer sound better then a maxma with a 3litre ?i personally think it has to do with the valvetrain setup first, then it moves to the way the exhaust hangs the thickness of the tubing all the way back. ive played alot with my exhaust and ive got a nice burble at low rpms that i got by securing my exhaust setup to the frame more. so there )
#9
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Originally posted by Jeff92se
The bmw mufflers are dual chambered like the skyline/2000+ maxima ones are?
The bmw mufflers are dual chambered like the skyline/2000+ maxima ones are?
Dual chambered mufflers =
BTW, I love the way my exhaust system sounds with the OEM variable-capacity muffler installed. Talk about purrrrrrring.
#11
Originally posted by Jeff92se
Sound better? That's pretty subjective. But the motor config could make a difference(valvetrain doesn't really make a difference). Since all of the exhuast is one side for the inline 6, it could be different. But in general, displacement is probably one of the biggest factors. I suppose you can make a big displacement sound crappy, but it's next to impossible to make a small displacement 4 cylinder sound deep and nice.
You have to remember, yes that bmw is only 2.5 liters but it's still a 6 cylinder.
There's nothing like a small displacement V12 Ferrari at full song. I think they are only about 5 liters or so.(the older ones anyway)
Sound better? That's pretty subjective. But the motor config could make a difference(valvetrain doesn't really make a difference). Since all of the exhuast is one side for the inline 6, it could be different. But in general, displacement is probably one of the biggest factors. I suppose you can make a big displacement sound crappy, but it's next to impossible to make a small displacement 4 cylinder sound deep and nice.
You have to remember, yes that bmw is only 2.5 liters but it's still a 6 cylinder.
There's nothing like a small displacement V12 Ferrari at full song. I think they are only about 5 liters or so.(the older ones anyway)
#12
i think it is due to the fact that the engines are inline. notice even Jeeps sound very distinct when they start up and drive by. 4.0 is an inline 6. very different than say a chevy V6. same is true for our V6 and a BMW inline.
#13
I really like the way my 330 sounds, especially at low RPMs.
And Nick was right about the muffler. Valve opens at certain RPMs. You can actually hear it clanking while driving in a garage or next to a wall. That sound is very soft but can be annoying sometimes though.
And Nick was right about the muffler. Valve opens at certain RPMs. You can actually hear it clanking while driving in a garage or next to a wall. That sound is very soft but can be annoying sometimes though.
#14
It has to do with firing order and cyclinder numbers. Displacement does help things out. A good example is the General Motors Gen I/II 350s vs the new LS1 motors. The Gen I/II motors have that distinctive rumble and clean sound at all rpms. The LS1, on the otherhand, sounds very mechanical and lacks the deep hollow rumble of the older engines. The difference? Firing order. Don't get me wrong, you can get an LS1 to sound good, but it doesn't match the sound quality of the older 350s. Most F-Body guys agree on this. Ford on the otherhand pulled of the impossible by making their smaller and completely different 4.6 sound just like the 5.0. Simply amazing.
You'll never get a V8 rumble from a V6. It might sound good from idle to 2500rpms, but after that there's no mistaking there are only 6 pistons working.
I've found that my setup has a very nice throatiness at idle and in the lower rpms. There's just enough noise to let you know that this car isn't stock. Anything above 4000rpm is drowned out by the intake. A throttle induced tunable exhaust, if you will At cruise, my car sounds much like stock. No drone, no buzz. I've got a Y-pipe, B-pipe with no resonator, stock muffler, and a 3.5" resonated tip.
Dave
You'll never get a V8 rumble from a V6. It might sound good from idle to 2500rpms, but after that there's no mistaking there are only 6 pistons working.
I've found that my setup has a very nice throatiness at idle and in the lower rpms. There's just enough noise to let you know that this car isn't stock. Anything above 4000rpm is drowned out by the intake. A throttle induced tunable exhaust, if you will At cruise, my car sounds much like stock. No drone, no buzz. I've got a Y-pipe, B-pipe with no resonator, stock muffler, and a 3.5" resonated tip.
Dave
#15
Originally posted by Craig Mack
Jeff is right, there is no replacement for displacement. That's why all those 1.6L civics/4 bangers sound aweful under WOT with the fart can mufflers.
If you want rumble, go with a flowmasters...i know my setup sounds MUCH different then a greddy or other conventional setup.
Jeff is right, there is no replacement for displacement. That's why all those 1.6L civics/4 bangers sound aweful under WOT with the fart can mufflers.
If you want rumble, go with a flowmasters...i know my setup sounds MUCH different then a greddy or other conventional setup.
#16
Originally posted by NotNew!!NewSN!!
i didnt even read this thread, all i can say is dammmmmm ur sig pic is nice
i didnt even read this thread, all i can say is dammmmmm ur sig pic is nice
Thanks bro for the compliment, '95s are the SHlT arent they? Soon I will be 5-speed like you and Dave B. and THEN I will feel the POWAH!
#17
Originally posted by AndyXXL
I really like the way my 330 sounds, especially at low RPMs.
And Nick was right about the muffler. Valve opens at certain RPMs. You can actually hear it clanking while driving in a garage or next to a wall. That sound is very soft but can be annoying sometimes though.
I really like the way my 330 sounds, especially at low RPMs.
And Nick was right about the muffler. Valve opens at certain RPMs. You can actually hear it clanking while driving in a garage or next to a wall. That sound is very soft but can be annoying sometimes though.
#18
I really liked the exhaust note of the older 325s and 525s back in the early-mid 90's those sounded alot better than the newer ones just my opinion
and the WRX? it makes 'odd' sounds because its a flat four... its really distinctive, especially when coming down off of acceleration as the engine winds down it aint no V8 sound but it is sweet!
and the WRX? it makes 'odd' sounds because its a flat four... its really distinctive, especially when coming down off of acceleration as the engine winds down it aint no V8 sound but it is sweet!
#19
Originally posted by MAX2000JP
Are you sure??? My moms 330i doesnt exhibit this sound. Like I said, I started the car up and exhuast exited both tips. On my Maxima, it only flows out one tip. Then when u rev it, the other tip opens and they flow in conjunction.
Are you sure??? My moms 330i doesnt exhibit this sound. Like I said, I started the car up and exhuast exited both tips. On my Maxima, it only flows out one tip. Then when u rev it, the other tip opens and they flow in conjunction.
http://www.bimmerfest.com/forums/sho...ight=resonator
#20
#21
Originally posted by MAX2000JP
Learn something new everyday. I just looked into it further and noticed the solenoid and valve. When the car is off the valve is open and when the car is at idle the valve is open. Is this normal?? When does the valve close??
Learn something new everyday. I just looked into it further and noticed the solenoid and valve. When the car is off the valve is open and when the car is at idle the valve is open. Is this normal?? When does the valve close??
#22
Originally posted by MAX2000JP
The 330i doesnt use a Variable Capacity muffler. I just started my moms 330 and exhaust came out of both tips. I dont think any BMW uses a VC muffler, but I could be wrong.
The 330i doesnt use a Variable Capacity muffler. I just started my moms 330 and exhaust came out of both tips. I dont think any BMW uses a VC muffler, but I could be wrong.
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