[997CABOVA]

ohhhhh this is looking to be good hahaha

[acre22f90]

Originally Posted by Vic55

So for my specific situation, just make an X pipe where Ive outlined the arrows??

Gonna guinea pig this one??

[Vic55]

Originally Posted by ACremona22

Gonna guinea pig this one??

Yep Ill be the one.

[TrentMeister]

Originally Posted by Vic55

Yep Ill be the one.

My man😎

Now if we could just figure out how to keep the valves open permanently I think we'll have a pretty awesome soundtrack.

Also have you put down your back seats for some more sound in cabin?

[Vic55]

Originally Posted by LBbluem2

My man��

Now if we could just figure out how to keep the valves open permanently I think we'll have a pretty awesome soundtrack.

Also have you put down your back seats for some more sound in cabin?

I have not but I do know that will add some more interior pleasure.

I didnt drive the car this week but I just opened the garage and did this cold start video... the small cracks are actually loud in person (Cell Vid)

I did turn on all the electronics inside without turning on the engine, hit my M2 button (all agro settings) and then started it which gives the full valve open start.

[RugbyBro]

Originally Posted by Vic55

Yep Ill be the one.

Yeah either of the resonator spots should work. Generally when it comes to X and H pipes, and X results in a higher pitch where as an H results in a lower pitch. Just food for thought as you decide what type of tone you want

[acre22f90]

Originally Posted by RugbyBro

Yeah either of the resonator spots should work. Generally when it comes to X and H pipes, and X results in a higher pitch where as an H results in a lower pitch. Just food for thought as you decide what type of tone you want

Please do H!!

[RugbyBro]

Vic55 the one thing I want to clarify for the thread is that an X or H won’t fundamentally change the tone, rather it modifies it or accentuates/tempers certain characteristics. If you like the stock tone but want more volume or want to intensify a certain quality then you are golden with the X or H in the current setup

If you are looking to change the tone itself (say to sound more like B58), you’ll have to play with the pipe lengths - I know BMW said they equalized the pipes but it really doesn’t sound like they did. Valvetronic’s upcoming midpipe equalized them and has a shift in the underlying tone, which is why it sounds the way it does.

EDIT: ACremona22 I just saw your earlier comment about B58 sounding better - if you like that type of sound you will need to equalize the independent exhaust pipe lengths prior to merging them as I am alluding to above. Check out valvetronic’s video on their G80 mid-pipe, that is what an equal length exhaust sounds like. B58 (and N55) are inherently equal length as they are a single turbo that collects into a single exhaust pipe.

[Blindside_137]

Hmmmm. I might have done a second cat delete first and then decided if I wanted to keep resonators or not

[Montaver]

Sounds like a tuneless raspy mess to me, pretty indistinguishable from an S55. Sounds a touch more equal length than an s55 but the duelling 3 cylinder sound is very present. Personally I'd be adding more resonators to smooth it out not deleting them. The S turbo motors are so raspy to begin with, for more volume you may be better off deleting the secondary cats or changing the muffler and altering the midpipe for a more equal tone. Kudos to you for being the guinea pig though!

[Transfer]

This sounds great, except... I don't think I can do those burbles. The S58 has a strange gravel burble that sort of goes on and on at times and this increases the volume of that in a not good way IMO. The burbles sound ok to me in stock form but I wouldn't want to highlight them.

Do you find that aspect a little too much or not a bother with the resonator delete?

[BimmerFix]

Originally Posted by Montaver

Sounds like a tuneless raspy mess to me, pretty indistinguishable from an S55. Sounds a touch more equal length than an s55 but the duelling 3 cylinder sound is very present. Personally I'd be adding more resonators to smooth it out not deleting them. The S turbo motors are so raspy to begin with, for more volume you may be better off deleting the secondary cats or changing the muffler and altering the midpipe for a more equal tone. Kudos to you for being the guinea pig though!

My feelings also, sounds way more raspy
now.

[Ghostriderf80]

Originally Posted by Vic55

My apologies up front for doing lame teasers in multiple threads that were not my own across this board.

I have removed multiple resonators for several S63 Tu cars Ive owned and many Benzes, Audis, and even a Bentley with good results. My most recent resonator pull was on my M8 GC Comp and I gained a decent amount of decibels without much, if any, tonal change.

I picked up this G80 not too long ago and felt it was too quiet in stock format even with the valves open so I took it over to my local muffler guy who Ive used for years and pulled both resonators off. From another member here, I learned that there were two larger suitcases and pulling just the primary would not yield enough gains for me. YMMV.

So I pulled both (post cats) and there is definitely a decibel or loudness gain. I say under light throttle the gain is circa 20% and under WOT maybe 35% or so. Based on my live ear, the exhaust tones remained the same where there is a bass(y) tone at cold start and then a more higher pitched tone up top.

Mind you this process cost me 300 dollars all in and is reversible in nature. The video does have some higher rpm (7k) rasp but in reality I dont hear it via regular and spirited driving but you will hear it in the video from a stand still because I pushed the revs all the way up vs just leaving it maxed at 5 to 6k. For me the increase in growl and roar is there but for those who hate burbles, its not too bad. There are heightened bangs on rapid upshifts too.

Here are some pics and the vid:

stock set up



Post removal



Ugly secondary cats (Ill pull this next)





Cell Phone Videos (apologies for the bumper mount resolution)

Hmmm the car had too many beans or is lactose intolerant.

[calebcross]

Wtf do all you mean it sounds great? It sounds like a Diesel truck combined with a raspy Honda Civic.

A B58 sounds great, a Porsche GT3 RS sounds great, hell even a Corvette sounds great. But for goodness sake that sounds terrible - far worse than the F8X.

BMW claims they did an equal length exhaust from the factory, but it doesn’t sound like it at all.

[///M ARMY]

Sounds not bad.... I'm just waiting for catless dp with straight pipes.....

[RAUDERRIPPER]

Originally Posted by BSM_G808

Thanks for this man! It is hard to tell the actual sound from a video. I am sure it sounds nice in person.

Any noticeable drone at highway speeds?

I feel like if you backed up (in mostly all these cases) the sound would come out a lot better on video.

[Jack yang]

cannot tell the difference between s55

[xmanpro]

Wow Vic55 congrats on the front page!

I like the way this sounds! Sec cat delete might just complete it.

You've inspired me again and I may do this and cat del on my m3c whenever that thing decides to show up.

Enjoy the ride bro.

[bjcarls]

Can you add a lighter flywheel too? ; )

[Der_Wolf]

Awesome

[///MeraldCity_G82]

I have an appointment to have both resonators deleted and will put in a H pipe. I will post some sounds clips.

[deeldoo]

Originally Posted by ACremona22

I want to like this, and I think I do. In just worried about how that higher end raspiness actually sounds. Was hoping it would be deeper.

I may even feel the B58 sounds better than the S58 still.

I don't get this shit, everyone finds the muffled sounds as "good" while anything "raspy" sounds bad.

In my opinion rasp is aggressive and raw, and not to mention S55 and S58 both when driven extremely hard and warmed up as intended have 0 rasp even straight piped.

It seems like everyone commutes their 15 minutes to work doing 30 mph and complains about "rasp".

Ya no fuck, these cars don't sound good until really opened up.

Just my opinion, but i feel the B58, N55 etc all sound muffled