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BMW M5 F10 revving (new RingTaxi) Monte Carlo Blue -exhaust flaps CLOSED- with Claudia Hürtgen

20K views 40 replies 26 participants last post by  M5 Roggan 
#1 · (Edited)
#11 ·
Nope.. It's because the car is cold i got the 335i n54.. when you turn it on only right pipe works. Same with the m5 the outer pipes only works when it's cold.. after like 2-3 min you can hear a cling sound from the exhaust flap indicating that it is fully open :) - I got my exhaust flap open, forced it :)
 
#12 ·
Sounds amazing. Are they going to take you for a ride?
 
#16 ·
It doesn't sound anywhere near as an S85 V10 :( But hey...what can you expect out of a twin turbo engine eh?

Good job to the M engineers for their engine and exhaust work! And great lap time of 7:55 at the ring! The M5 is king again! (For now) Maaaybe.... somebody can achieve even better times than 7:55? Maybe they're conservative? Har har har
 
#17 ·
Avlnch... That makes sense. Thanks for the exhat flap photo and the idrive photo.
 
#18 ·
Is there an exhaust flap on the e60 M5?
 
#21 · (Edited)
Nope, the only current M vehicle with an exhaust butterfly valve is the X5M. The next is said to be the soon to hit production F10 M5.

Sounds real good for closed valves. Glad to hear the TT didn't muffle the exhaust note all that much. Can't wait to hear it when the likes of Supersprint, Eisenmann, Tubi etc. all get their hands on one!
Defiantly does not sounds like my E60 V10, but never expected it to.. and really cannot compare - I will wait to hear it in person to judge.

Concerning the exhaust's appearance the sound, I would keep the following in mind:
1. M exhausts have always came (IMO) quiet from the factory. The tips diameter always seems too small as well.
2. The exhaust sound of performance cars is only "half captured" in video. Exhaust sound -always- sounds different in person.
3. Video of exhaust note/sound level never does the "real sound (in person)" justice.
4. The equipment used to capture the sound was probably a hand held camera/video-camera or iPhone.

Just think about taping or seeing a video of YOUR own M exhaust.. always sounds different and quiet in any video.
 
#20 ·
Sounds real good for closed valves. Glad to hear the TT didn't muffle the exhaust note all that much. Can't wait to hear it when the likes of Supersprint, Eisenmann, Tubi et all get their hands on one!
 
#23 ·
The M5's exhaust manifold is basically a 180 degree header design. This was used on the Ford GT 40 (without turbos obviously) and got the nickname "bundle of snakes" exhaust due to the exhaust tubes criss crossing from bank to bank.

The idea was to get the bost of both worlds from the two different crankshaft profiles available to a V8 engine - 90degree (cross plane) and 180 degree (flat plane). Allmost every road car V8 engine has a 90 degree crank whereas the racing and Ferrari V8's are 180 degree. As most of you have noticed there is a big difference in the sound a V8 with a 180 degree crankshaft makes compared to the regular V8 burble of the 90 degree crank V8. That has to do with the difference in firing sequence between the two concepts.

The 180 degree header desig gives improved low and mid range torque as well as a sound much more similar to a flat plane V8 race engine. That's why the M5 sounds so different to the X5/6M I guess.





Burns Stainless LLC - Bundles of Snakes and 180 Degree Headers

Most modern V-8s have what is known as 90-degree cranks (aka crucified cranks, bent cranks, cross-plane cranks) wherein the cylinder firing order is such that two cylinders on each bank fire consecutively as opposed to alternating banks. The purpose of the 90-degree crank is to minimize vibrations inherent to “flat-plane” cranks. Some racing and high performance engines including Ferraris use a flat-plane crank to optimize the intake and exhaust processes, accepting the additional vibrations. The problem is that for a conventional 4-1 exhaust header, the separation between two firing (or exhaust) impulses is 90 crank degrees in each collector versus 180 crank degrees for a flat crank engine.This gives the engine that inherent “American V-8” exhaust burble, but also causes a “crowded” condition in the collector when two exhaust pulses, separated by only 90 crank degrees are trying to exit through the collector.To accommodate this, the collector for a 90-degree crank motor must be larger than for an “all-other-things-being-equal” flat-crank motor, thereby losing some low and mid-range torque.The “bundle of snakes” design collects two tubes from each bank into a single 4-1 collector resulting in four evenly spaced exhaust pulses as in the flat-crank header design.A broad power band is inherent to the 180 degree header design due to the smaller collector size. This was a great idea, and I am sure contributed to the success of the GT40 “back-in-the-day.”
 
#32 ·
i am glad they used flaps this time. they should have done it on their older models.

alot of ppl complained about their exhaust tone in the e60's, which was a diesel-like tone ... In my opinion they went that route to keep the "luxury" feel in the m5 since its a sedan and majority of the owners are not fans of loud exhausts. in addition to world standards for emissions etc.

the current design in the F10's (using flaps technology) will allow them to target more customers "in a way" and give us the opportunity to feel the car ...

my big question! is it controllable through a button/switch ?
 
#33 ·
i am glad they used flaps this time. they should have done it on their older models.

alot of ppl complained about their exhaust tone in the e60's, which was a diesel-like tone ... In my opinion they went that route to keep the "luxury" feel in the m5 since its a sedan and majority of the owners are not fans of loud exhausts. in addition to world standards for emissions etc.

the current design in the F10's (using flaps technology) will allow them to target more customers "in a way" and give us the opportunity to feel the car ...

my big question! is it controllable through a button/switch ?

Maybe BMW have done as Aston Martin has done... Take out fuse #19 and the exhaust flaps are open all the time...
 
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