Z4M Stromung VS Supersprint Powerloop

[ZeD4Mr]

I've recent changed the exhaust system from Stromung to SS Powerloop. After searching for quite a while online, I couldn't really seem to find a good direct comparison exhaust video between the Stromung and the Supersprint Powerloop system. So since I have the opportunity, I did a video for both on the same road, same camera position with some rev and acceleration to share with the forum. These systems are for the folks who wants more sporty and civil exhausts.

In terms of refineness and volume of loudness.

Remus < Supersprint Powerloop < Stromung

Remus: Barely any more volume from stock and if you listen for it, it's about 15% louder than stock. I have ridden and hear it in person a couple of times but I have not owned and lived with it tho. Those experiences were the other reason I didn't purchase a set besides its looks. Very conservative.

Supersprint Powerloop: You know you have an exhaust system. It's about 50% more volume than stock but it has a more refined sound. It's smoother throughout the rpm range but lower pitch at idle and higher pitch at the upper rpm. Barely lighter than stock, 20.8 lbs per side. Zero drone at any rpm. 80mm quad tips.

Stromung: 55% more than stock. It's there. You feel it and hear it. Lower tone through out the rpm than the SS Powerloop but higher pitch at idle. If I'm splitting hair, this sound a bit unrefined, more crackles and tiny higher pitch than the Powerloop at idle and around town. The weight savings, however, it's not something to be sneezed at. Standing at 13.8 lbs per side. 10% drone when at the wrong rpm. 73mm tips.

There're, however, others suspects in this range of more civil exhausts. I can only speculate based on research for two other.

KKS titanium: ~$3,000 w/o valves.
Arguay Exhaust: $2,250
Eisenmann Sport: $2191

Onto the VIDEOs

1. Z4M Stromung.. Here

2. Supersprint Powerloop.. Here


I think I'm keeping the Powerloop for it's sound quality and looks for now....

.

[Beedub]

remus sounds perfect for my needs.

[inTgr8r]

Originally Posted by Beedub

remus sounds perfect for my needs.

You might as well put OE back on

Powerloops are a mild and mellow upgrade from OE.
Loved them on my M Roady.
The other nice thing with SS is that you can adjust how far the tips extend, and balance the length side to side.

[Beedub]

Originally Posted by inTgr8r

You might as well put OE back on

Powerloops are a mild and mellow upgrade from OE.
Loved them on my M Roady.
The other nice thing with SS is that you can adjust how far the tips extend, and balance the length side to side.

dont really agree....

i haven't got my stockers so getting a set will be expensive, and these still Look nicer with a nicer construction quality. so for the extra i may as well get some aftermarket items. MY RPI need to go..... lost all the love for them now tbh.

if remus / power loops come up in the uk ill snap them up, sadly parts are really tough to get hold of here without buying new.

[inTgr8r]

Originally Posted by Beedub

dont really agree....

i haven't got my stockers so getting a set will be expensive, and these still Look nicer with a nicer construction quality. so for the extra i may as well get some aftermarket items. MY RPI need to go..... lost all the love for them now tbh.

if remus / power loops come up in the uk ill snap them up, sadly parts are really tough to get hold of here without buying new.

Lol... You lasted a lot longer than I did with RPI.

[rockstar93]

Originally Posted by inTgr8r

Lol... You lasted a lot longer than I did with RPI.

And then there's me lol. Taking the RPi's off my roadie and putting them on the coupe. The Eisenman that are on it are just too quiet for me.

[XMetal]

Originally Posted by inTgr8r

You might as well put OE back on

Powerloops are a mild and mellow upgrade from OE.
Loved them on my M Roady.
The other nice thing with SS is that you can adjust how far the tips extend, and balance the length side to side.

This is most likely due to NA headers vs Euro headers? Most people in Europe appeared to say Remus sounds much louder than stock while NA people say it's barely louder. I'm in the latter camp. Then again, maybe us NA folks are somewhat deaf due to all the loud exhausts or musics that we listen to growing up

OP - thanks for putting up a comparison video using the same recording method. This is the best way to judge exhausts, other than doing it in person.

The Stromung seems to extend out quite a bit - is this normal?

[inTgr8r]

Originally Posted by rockstar93

And then there's me lol. Taking the RPi's off my roadie and putting them on the coupe. The Eisenman that are on it are just too quiet for me.

...you will notice a difference with the coupe.

[ZeD4Mr]

Originally Posted by inTgr8r

You might as well put OE back on

Powerloops are a mild and mellow upgrade from OE.
Loved them on my M Roady.
The other nice thing with SS is that you can adjust how far the tips extend, and balance the length side to side.

Yes, it’s nice to have so many adjustments to make a perfect alignment. Build quality is much better.

Originally Posted by rockstar93

And then there's me lol. Taking the RPi's off my roadie and putting them on the coupe. The Eisenman that are on it are just too quiet for me.

Are they the sport or race version? Can you do a recording of RPi vs Eisenmann?

Originally Posted by XMetal

This is most likely due to NA headers vs Euro headers? Most people in Europe appeared to say Remus sounds much louder than stock while NA people say it's barely louder. I'm in the latter camp. Then again, maybe us NA folks are somewhat deaf due to all the loud exhausts or musics that we listen to growing up

OP - thanks for putting up a comparison video using the same recording method. This is the best way to judge exhausts, other than doing it in person.

The Stromung seems to extend out quite a bit - is this normal?

These new goPro has a very wide lens. They hardly too long and do looked longer in the video than in person. Initially I think the SS is too short, almost flush to the bumper and afraid the bumper will melt if I installed too close. After some adjustment, the 80mm tips just look much better. For reference point, I can see the Stromung logo just past the bumper where the Supersprint logo is hard to see in person.

[David70]

Originally Posted by ZeD4Mr

I've recent changed the exhaust system from Stromung to SS Powerloop. After searching for quite a while online, I couldn't really seem to find a good direct comparison exhaust video between the Stromung and the Supersprint Powerloop system. So since I have the opportunity, I did a video for both on the same road, same camera position with some rev and acceleration to share with the forum. These systems are for the folks who wants more sporty and civil exhausts.

In terms of refineness and volume of loudness.

Remus < Supersprint Powerloop < Stromung

Remus: Barely any more volume from stock and if you listen for it, it's about 15% louder than stock. I have ridden and hear it in person a couple of times but I have not owned and lived with it tho. Those experiences were the other reason I didn't purchase a set besides its looks. Very conservative.

Supersprint Powerloop: You know you have an exhaust system. It's about 50% more volume than stock but it has a more refined sound. It's smoother throughout the rpm range but lower pitch at idle and higher pitch at the upper rpm. Barely lighter than stock, 20.8 lbs per side. Zero drone at any rpm. 80mm quad tips.

Stromung: 55% more than stock. It's there. You feel it and hear it. Lower tone through out the rpm than the SS Powerloop but higher pitch at idle. If I'm splitting hair, this sound a bit unrefined, more crackles and tiny higher pitch than the Powerloop at idle and around town. The weight savings, however, it's not something to be sneezed at. Standing at 13.8 lbs per side. 10% drone when at the wrong rpm. 73mm tips.

There're, however, others suspects in this range of more civil exhausts. I can only speculate based on research for two other.

KKS titanium: ~$3,000 w/o valves.
Arguay Exhaust: $2,250
Eisenmann Sport: $2191

Onto the VIDEOs

1. Z4M Stromung.. Here

2. Supersprint Powerloop.. Here


I think I'm keeping the Powerloop for it's sound quality and looks for now....

.

Good write up. I have the Stromung's and happy with them but I also only went from OEM to them, nothing else. One thing worth noting is I think the Stromung's also cost a lot less. I plan on going from NA headers to European headers this winter (already have the headers) so it will be interesting to see how much the sound changes.

[rockstar93]

Originally Posted by inTgr8r

...you will notice a difference with the coupe.

Yeah I'm expecting a big difference. I found a difference in how it resonated and droned more in the Roadster with the top up compared to down. Hoping the silencers can make it a bit more bearable - I haven't been running them in the roadster as it didn't seem to make any noticeable difference.

Originally Posted by ZeD4Mr

Are they the sport or race version? Can you do a recording of RPi vs Eisenmann?

Honestly, I have no idea - anybody know if there is any visual distinctions between the sport or race? They're not very loud, closer to my stock exhaust than my RPi's so I'm assuming they're sport versions. Absolutely no drone, with a nice, deep tone. In my mind this is how the car should have come from the factory. Just much quieter than I'm used to coming from RPi's.

I can try and make a video showing the difference, but I don't have any microphones or anything so a GoPro will have to suffice.

[pokeybritches]

Originally Posted by Beedub

dont really agree....

i haven't got my stockers so getting a set will be expensive, and these still Look nicer with a nicer construction quality. so for the extra i may as well get some aftermarket items. MY RPI need to go..... lost all the love for them now tbh.

if remus / power loops come up in the uk ill snap them up, sadly parts are really tough to get hold of here without buying new.

I think we have similar exhaust setups minus the rear cans. I'm trying to decide between Remus, SS Powerloops, and Eisenmann sport (non-race). I may put my stock ones on to see how they sound.

******

The header/s-pipe setup makes a larger difference than any rear cans. Eliminating one set of cats makes the car 25-50% louder, depending on which set of cats you remove. Taking out both makes the car an order of magnitude louder. With a set of "race" mufflers, everyone in 1/4 mile radius will know what your right foot is doing, especially if you suddenly stomp the throttle.

[XMetal]

Originally Posted by pokeybritches

I think we have similar exhaust setups minus the rear cans. I'm trying to decide between Remus, SS Powerloops, and Eisenmann sport (non-race). I may put my stock ones on to see how they sound.

******

The header/s-pipe setup makes a larger difference than any rear cans. Eliminating one set of cats makes the car 25-50% louder, depending on which set of cats you remove. Taking out both makes the car an order of magnitude louder. With a set of "race" mufflers, everyone in 1/4 mile radius will know what your right foot is doing, especially if you suddenly stomp the throttle.

That would be cool, to hear a difference (stock for stock) between Euro and NA setup.

[David70]

I thought this was useful -

http://www.zpost.com/forums/showpost...3&postcount=38

RPI exhaust, stock headers, stock section 1
RPI exhaust, Euro headers, stock section 1
RPI exhaust, Euro headers, Supersprint section 1

Did a good job of keeping other variables limited.

[wspohn]

I have RPI on my coupe and have no trouble with drone.

Little surprised as my Solstice coupe is quite sensitive to bass resonances, but it seems the BMW is less so?

[Beedub]

Originally Posted by wspohn

I have RPI on my coupe and have no trouble with drone.

Little surprised as my Solstice coupe is quite sensitive to bass resonances, but it seems the BMW is less so?

your probably much younger than me... lol!!! I've just hit 32 and i cant stand it anymore!!

however i just turned the car over for the first time in ages and it sounds the business from outside

[wspohn]

Originally Posted by Beedub

your probably much younger than me... lol!!! I've just hit 32 and i cant stand it anymore!!

however i just turned the car over for the first time in ages and it sounds the business from outside

Actually no, much older than you, but some of us car guys never really grow up!

The Solstice had a vibration period right at the rpm I usually cruise at on the highway and it would have driven us crazy on long highway trip. Not the case with the Z4.

I bought my Z4 with the RPIs on it and they had been there for awhile - I understand that the noise level drops after they 'wear in' a bit, so maybe that is a factor.

[inTgr8r]

Originally Posted by wspohn

Actually no, much older than you, but some of us car guys never really grow up!

......

Trudat.

[Arsonism]

I thoroughly enjoyed my RPIs and I would love to go back to them, if I didn't slap headers and an x-pipe on there as well.

Headers made those things ear-shattering. I'm looking at stromungs when I get the car back.

[inTgr8r]

Originally Posted by Arsonism

I thoroughly enjoyed my RPIs and I would love to go back to them, if I didn't slap headers and an x-pipe on there as well.

Headers made those things ear-shattering. I'm looking at stromungs when I get the car back.

Yeah, that + x-pipe did it for me as well with the RPI.

[wspohn]

How noticeable is the power bump with the headers?

My understanding is that you get at least half as much as the headers give you from the RPI resonators, but correct me if that is incorrect.

[ZeD4Mr]

Out of our system, without going FI or tune, header gives us the most bump in power. Without the header, one can speculate the minimal gain from just the rear cans or x-pipe alone.

Us N. American guys usually go for Euro header or Supersprint, JVT back in the day etc. Fabspeed is another choice amongst some of the selected few but popular with the euro guys.

I've gone with SS header, back cans and a tune. It gave me more mid torque that can be felt on the track and street. Due to ease of installation, back cans are what most started with. Once they install header for the power, they dial back on the exhaust system on the sound level since it gave them much more volume than anticipated. I'm guilty as well.

I personally don't dare to venture into section one, as it's the last bottle neck short of straight pipes and it's the only set of cats we have in the car.