This is how you make an S55 engine sound good!

[spool twice]

Originally Posted by gatorfast

Am I the only one who doesn't think the exhaust in those vids sounds that much different from anything else?

It depends on which video you are referring to? The one that sounds more RB26/2JZ or the other one without the equalized pipes?

[Kilabyte]

Originally Posted by spool twice

It depends on which video you are referring to? The one that sounds more RB26/2JZ or the other one without the equalized pipes?

Pretty sure he only listened to the fist dyno pull and stopped watching

[domino_z]

Very clever guys

I'm keen to add the magnaflow twins in my fabspeed mid

Projects for Christmas holidays

I'm too close to selling the car to bother with a full oe exhaust mod, but splicing in couple resonators to my aftermarket midpipe is easy enough in name of s55 science

Where do you guys suggest I mount the magnaflows?

Edit: just realized I'd need to weld in 4 2.5-2.75 reducers, might just mod my oe mid instead

[mmmmQuattro]

[JamesGames]

Originally Posted by mmmmQuattro

This sounds like a lawnmower to me

[mmmmQuattro]

[mmmmQuattro]

Originally Posted by JamesGames

This sounds like a lawnmower to me

The GoPro mic is pretty directional and by having it over one set of pipes, it sounds quite different to what it does in real life.

[RevNev]

Here's mine on start up with valves open, catless downpipes, 4 resonators in the midpipe and X type merge. It's a similar concept to the Magnaflow resonators replacing the secondary cats, but more resonators and X type merge instead of the H pipe inside the stock resonator.

[mmmmQuattro]

Originally Posted by RevNev

Here's mine on start up with valves open, catless downpipes, 4 resonators in the midpipe and X type merge. It's a similar concept to the Magnaflow resonators replacing the secondary cats, but more resonators and X type merge instead of the H pipe inside the stock resonator.

do you still have secondary cats?

[allinon72]

Originally Posted by mmmmQuattro

Sorry, that sounds like every other exhaust for the F80. Rasp and buzz.

[Envy ///M3]

Originally Posted by mmmmQuattro

Originally Posted by allinon72

Sorry, that sounds like every other exhaust for the F80. Rasp and buzz.

It actually doesnt sound bad, I think we're all just spoiled now that we've heard what this car is capable of sounding like

[RevNev]

Originally Posted by mmmmQuattro

do you still have secondary cats?

No, mine's catless

[mmmmQuattro]

Originally Posted by RevNev

No, mine's catless

That explains how you can fit the extra two resonators.
the staggered position of the secondary cats is a real limiting factor

I never posted my videos to claim my M4 sounded good or bad, just to show how it does sound.
with catless DPs and the standard Magnaflow exhaust it was too raspy, loud and thong-slap.

The mid-section is really the most important part of the exhaust. playing around axle back won't achieve much.

[spool twice]

Originally Posted by Envy ///M3

It actually doesnt sound bad, I think we're all just spoiled now that we've heard what this car is capable of sounding like

I agree, it doesn't sound terrible but it does sound like another variant of the same ol S55 sound without equalizing the pipes prior to them merging (either as a single, or a connecting method such as an H or X-pipe), where it truly changes the over tone into a more sports-car like pitch.

[Envy ///M3]

Originally Posted by spool twice

I agree, it doesn't sound terrible but it does sound like another variant of the same ol S55 sound without equalizing the pipes prior to them merging (either as a single, or a connecting method such as an H or X-pipe), where it truly changes the over tone into a more sports-car like pitch.

I see exactly what you're saying. Someone needs to figure out a way to equalize the streams before they get to the merger. That or keep the streams seperate, but somehow figure a way to make the pipes equal in length before reaching the muffler.

The AA signature exhaust probably give us the best evidence of the fact that even merging the exhaust right after the downpipes and keeping them merged all the way to the muffler(not spliting off around the diff) still doesnt do enough to equalize the sound.

[RMDZidane]

Hey guys. I'll work on getting something made to bolt up to the stock exhaust also. There isn't as much space as I want but I think it can be done. It will have to be from the end of the downpipes back. But I'm really curious to see how I can make the stock muffler sound with my setup
Maybe by this coming Friday...

Originally Posted by Envy ///M3

I see exactly what you're saying. Someone needs to figure out a way to equalize the streams before they get to the merger. That or keep the streams seperate, but somehow figure a way to make the pipes equal in length before reaching the muffler.

The AA signature exhaust probably give us the best evidence of the fact that even merging the exhaust right after the downpipes and keeping them merged all the way to the muffler(not spliting off around the diff) still doesnt do enough to equalize the sound.

[Kilabyte]

Originally Posted by mmmmQuattro

The GoPro mic is pretty directional and by having it over one set of pipes, it sounds quite different to what it does in real life.

it sounds similar to my MPE, which sounds horrible.

[Envy ///M3]

Has anyone thought of trying something like this? X-pipe that crosses over rather than passes through. Will change the stream that comes out of the short downpipe over to the longer side of the exhaust.

[ntg44]

Originally Posted by Envy ///M3

Has anyone thought of trying something like this? X-pipe that crosses over rather than passes through. Will change the stream that comes out of the short downpipe over to the longer side of the exhaust.

To make up for the 14 inch longer front downpipe, you would need like 5-6 of those. Better off utilizing the extra real estate available near muffler area.

[Envy ///M3]

Originally Posted by ntgarage44

To make up for the 14 inch longer front downpipe, you would need like 5-6 if those. Better off utilizing the extra real estate available near muffler area.

How much longer is the long side of the exhaust than the short side?

[GT_Juls]

This is extremely exciting to read and see what happens. That sound coming from that custom setup is EXACTLY what I love about inline-6 engines. I hope you seriously push through and fabricate a couple for sale.

[RMDZidane]

I know those pipes! I had that Protomotive exhaust on my 991 Turbo S. It was the only exhaust I ever wanted for my 911s because it has excellent flow and sound characteristics. Seems like only guys from the Middle East know about them. And they're from Arkansas

Originally Posted by Envy ///M3

Has anyone thought of trying something like this? X-pipe that crosses over rather than passes through. Will change the stream that comes out of the short downpipe over to the longer side of the exhaust.