Single vs Double Midpipe

[KeyBoy]

How does a single midpipe compare to a double midpipe? VRSF has both designs and watching videos of both they sound so similar. Are there any pros/cons comparing the two?

The single is 3.5" and double are both 2.5" but how does that translate to a difference in sound, performance, volume, etc ?

Thanks

[behindthen0thing]

Wait for the equal length to come out if you want your car to sound good

[TopJimmy]

I prefer the single midpipe.

Reasons:
- exhaust scavenging from 2-into-1 (+HP)
- large pipe acts as an expansion space
- reduces raspy notes
- increases low tones (the sound I like)

[KeyBoy]

Originally Posted by behindthen0thing

Wait for the equal length to come out if you want your car to sound good

Yeah need to research that some more

[KeyBoy]

Originally Posted by TopJimmy

I prefer the single midpipe.

Reasons:
- exhaust scavenging from 2-into-1 (+HP)
- large pipe acts as an expansion space
- reduces raspy notes
- increases low tones (the sound I like)

Awesome thanks. Wonder if the larger expansion tank shifts the torque curve higher up in the rpm band.

[LINF83]

Any performance wise difference ? especially on aftermarket turbo ?

[TopJimmy]

The fatter pipe allows for lower pressure as exhaust exits the downpipes allowing some low-RPM improvement, but I'm sure the fat pipe helps the high-RPMs more, since 2turbos x heavy foot = Lots of exhaust.

Theres a YouTube showing how the AA mid has a significant venturi scavenging effect at the 2-into-1 that helps pull exhaust through the downpipes.

[mike@x-ph.com]

Originally Posted by KeyBoy

How does a single midpipe compare to a double midpipe? VRSF has both designs and watching videos of both they sound so similar. Are there any pros/cons comparing the two?

The single is 3.5" and double are both 2.5" but how does that translate to a difference in sound, performance, volume, etc ?

Thanks

Single mipdipe has a cleaner sound without any exhaust raspiness, It also makes more power

[Kilabyte]

Originally Posted by KeyBoy

Awesome thanks. Wonder if the larger expansion tank shifts the torque curve higher up in the rpm band.

If anything it would be the opposite. The difference will be the sound, this car has the awesome torque curve where you blow your tires off trying to accelerate past a prius at a light.

[BlownOne]

VRSF Single mid with catless downpipes and comp muffler sounds great!

[Euromotive Performance]

Originally Posted by KeyBoy

Yeah need to research that some more

The single mid-pipe has become popular due to the fact that it lessens the raspy nature of the S55 stock exhaust while also improving the tone and volume. Equal length will be the newest sector and we are starting development already. We should have our equal length system sound clips up soon, follow us on IG for updates @euromotiveperformance

[m4dbimmer]

Can anyone prove HP/TQ claims from a midpipe alone? Keep seeing claims of X, but they are including the gains from the DP, not just the midpipe by itself.

[Euromotive Performance]

Originally Posted by m4dbimmer

Can anyone prove HP/TQ claims from a midpipe alone? Keep seeing claims of X, but they are including the gains from the DP, not just the midpipe by itself.

I believe some people have dyno tested single mid-pipe designs and have come to the conclusion 10-20 horsepower on average in terms of gain. From customers we've installed single midpipes on they have reported a butt dyno increase in the mid range and the car wants to rev more freely, part of this could be placebo and the change in tone of the exhaust but there is no denying its one of the best easy mods on the F8x platform.

[mike@x-ph.com]

Originally Posted by m4dbimmer

Can anyone prove HP/TQ claims from a midpipe alone? Keep seeing claims of X, but they are including the gains from the DP, not just the midpipe by itself.

I dont have dyno from VRSF, but here is the dyno from the Active midpipe

[gk3]

I have a non-zcp 17 M4 with oem downpipe, vrsf single-pipe midpipe, oem muffler and it's honestly my favorite sounding F8X. I haven't seen any good sound clips of this setup so I'll have to get some recorded but the sound is a mild aggressive deep growl. The stock exhaust had virtually zero burbles being a non-zcp but replacing the midpipe has introduced these very subtle and occasional burbles, no tune on the car. There is still that wicked bark at left off in higher RPMs. Pulling the charcoal filters and dropping in BMC filters amplified the induction noise a good bit.

I didn't like how from a stop the car would sound aggressive through 1st and 2nd but into 3rd the valves would close and silence the car completely. So I bought a BMS canflap to open the valves, I'm literally addicted to the sound.

[tom @ eas]

Originally Posted by m4dbimmer

Can anyone prove HP/TQ claims from a midpipe alone? Keep seeing claims of X, but they are including the gains from the DP, not just the midpipe by itself.

Zero gains from midpipes, only change in tone. Only becomes beneficial in high boosted applications (larger turbos).

[bracer]

There was a dyno from Autotalent done on Jason's car there back to back and the 3.5" Active midpipe made 4hp. So about a wash. No dog in the fight, just reporting what it was.

Also you guys do realize the 3.5" single is actually smaller than the factory exhaust correct?

3.5" = 3.14*r^2 = 9.62 sq in area
65mm (stock) = 3.14*r^2 x 2 = 10.29 sq in area

So 3.5" single is 6% smaller than the factory exhaust from a flow standpoint.

[behindthen0thing]

I currently have the AA single midpipe.
I did not notice any power increase whatsoever.
It also didn't eliminate rasp. I have catless DP though, so thats a factor. The car sounds pretty ok until you hit that 3500 rpm rasp and it's obnoxiously loud.

[KeyBoy]

Originally Posted by gk3

I have a non-zcp 17 M4 with oem downpipe, vrsf single-pipe midpipe, oem muffler and it's honestly my favorite sounding F8X. I haven't seen any good sound clips of this setup so I'll have to get some recorded but the sound is a mild aggressive deep growl. The stock exhaust had virtually zero burbles being a non-zcp but replacing the midpipe has introduced these very subtle and occasional burbles, no tune on the car. There is still that wicked bark at left off in higher RPMs. Pulling the charcoal filters and dropping in BMC filters amplified the induction noise a good bit.

I didn't like how from a stop the car would sound aggressive through 1st and 2nd but into 3rd the valves would close and silence the car completely. So I bought a BMS canflap to open the valves, I'm literally addicted to the sound.

That's great to hear as my f80 is also non zcp with stock downpipe and muffler. Agree that there are not many sound samples to rely on given this base setup.

Glad to hear you really like it and look forward to some sound clips if you can.

[KeyBoy]

Originally Posted by Euromotive Performance

The single mid-pipe has become popular due to the fact that it lessens the raspy nature of the S55 stock exhaust while also improving the tone and volume. Equal length will be the newest sector and we are starting development already. We should have our equal length system sound clips up soon, follow us on IG for updates @euromotiveperformance

Definitely looking forward to hearing this new design. Hope pricing is in line with current midpipes out in the market

[gk3]

Originally Posted by KeyBoy

That's great to hear as my f80 is also non zcp with stock downpipe and muffler. Agree that there are not many sound samples to rely on given this base setup.

Glad to hear you really like it and look forward to some sound clips if you can.

Some dudes posted a video and did a good job recording the vrsf single midpipe. Their F80 has a dinan muffler, probably a bit littler louder than oem muffler but it also sounds like it introduced just a hair of rasp at the higher rpms. Timestamp & notes on a rough comparison with my stock downpipe, vrsf single mid & stock muffler setup.

Not my video.

timestamps
9:05 - Sounds just like my setup at startup. Noticeably deeper tone and slightly louder than stock.

10:57 & 11:01 - This is where I hear rasp higher in the revs, with stock muffler I don't get this sound ever, just a really clean deep sound. No pops or burbles but I think that's their tune.

12:46-12:53 - Accurate cruising sound, without a valve controller when your car shifts into third under light acceleration, the valves shut and silent the car.

15:17 - These revs again have a hair of rasp to me. I don't think you get any of this with stock muffler.

[KeyBoy]

Originally Posted by gk3

Some dudes posted a video and did a good job recording the vrsf single midpipe. Their F80 has a dinan muffler, probably a bit littler louder than oem muffler but it also sounds like it introduced just a hair of rasp at the higher rpms. Timestamp & notes on a rough comparison with my stock downpipe, vrsf single mid & stock muffler setup.

Not my video.

timestamps
9:05 - Sounds just like my setup at startup. Noticeably deeper tone and slightly louder than stock.

10:57 & 11:01 - This is where I hear rasp higher in the revs, with stock muffler I don't get this sound ever, just a really clean deep sound. No pops or burbles but I think that's their tune.

12:46-12:53 - Accurate cruising sound, without a valve controller when your car shifts into third under light acceleration, the valves shut and silent the car.

15:17 - These revs again have a hair of rasp to me. I don't think you get any of this with stock muffler.

Nice find! Yeah I do hear a little rasp on some of those revs as you highlighted. Definitely has a deeper sound to it as expected. I can see how paired with a non zcp muffler it may sound more crisp/clean with lower volume. Thanks