Why twin loop?

[ttttrigg3r]

I heard some people have obx and mugen twin loop exhaust? Why? Wouldn't the loop make you lose power?

[usedep3]

I heard some people have obx and mugen twin loop exhaust? Why? Wouldn't the loop make you lose power?

bc its JAY DEE EMMMMMMMM

well it's the quiter option for starters

[the JigGa mAn]

bc its JAY DEE EMMMMMMMM

well it's the quiter option for starters

obx isnt jdm

[MadLorEP3]

obx isnt jdm

mugen isnice because its quiet
so it wont attract too much unwanted attention from the popos

[powdbyrice]

doug (talonxracer) is one of the biggest advocates of the twin loop design. check out the engine section for more info.

never mind. the thread is gone.

but ask talonxracer for his input.

[Draw7Seven]

Twin loop designs reduce exhaust noise without significantly restricting flow. Of course, tuning the entire exhaust of any given car is far more advanced a concept than "put one of them OBX tween loops on thar, it'll go reel fast then," but twin loops allow an exhaust with higher flow capacity to sound less obnoxious. That's about the long and short of it, an axleback doesn't have much of an effect on a car performance-wise excepting that it might restrict your exhaust flow (cubic feet per minute, etc etc) based on how small the piping is or how restrictive the muffler acts.

[thehulme]

basically, less loud/obnoxious + still good power gain = awesome.

[usedep3]

obx isnt jdm

sarcasm fool, sarcasm. hence the rediculous spelling. if i was serious, it would have been JDM. see the difference?

its made in china probably, so its pretty close to japan

[4angrybadgers]

What a lot of people don't realize (at least outside of this well-educated forum :mbiggrin:) is that a bigger, free-flowing exhaust does not always make more power - and it can actually make less power. There was at least one thread (maybe several) in years past that had some good discussion by Talon and others on that subject. The twin-loop exhaust is better for some applications (bolt-ons, for example) than a wide-open fart pipe because of that reason.

[talonXracer]

The loop mufflers show the greatest gains over the ENTIRE rev band when compared to ANY other performance muffler and at the same time it is the quietest by far.

The loop desidn produces additional backpressure at lower rpm's to boost torque and whp production. This occurs because the exhaust flows following the loop and because the sound pulses are then almost 180degrees out of phase within the muffler, the perforated cores allow the out of phase sound pulses to cancel each other, this is why the loop muffler is so quiet. At higher rpm's and exhaust flow part of the exhaust still flows following the loop path, but a fair percentage also flows from one perforated core to the other core greating reducing the backpressure(also pulses are quieted due to phasing again) and produces greater whp than a typical fartcan like HKS, DC sports etc.

I would not waste the $$$ on a Mugen twin loop.

[MadLorEP3]

The loop mufflers show the greatest gains over the ENTIRE rev band when compared to ANY other performance muffler and at the same time it is the quietest by far.

The loop desidn produces additional backpressure at lower rpm's to boost torque and whp production. This occurs because the exhaust flows following the loop and because the sound pulses are then almost 180degrees out of phase within the muffler, the perforated cores allow the out of phase sound pulses to cancel each other, this is why the loop muffler is so quiet. At higher rpm's and exhaust flow part of the exhaust still flows following the loop path, but a fair percentage also flows from one perforated core to the other core greating reducing the backpressure(also pulses are quieted due to phasing again) and produces greater whp than a typical fartcan like HKS, DC sports etc.

I would not waste the $$$ on a Mugen twin loop.

I didnt understand what you said but I believe you

so the obx twin loop should work just as good as the mugen right or are there other brands available?

about $100 on egay (I dont know about this one)
http://i730.photobucket.com/albums/ww304/MadLorGLK/obxtwinloop.jpg

[talonXracer]

The OBX works fine, but it is OBX, so it's lifespan can be shorter than a better quality muffler like the Hytech Loop.

I always considered the mugen twin loop rather subsized for any big performance mod's. Decent for a basically bolt-on only A3.

[MadLorEP3]

The OBX works fine, but it is OBX, so it's lifespan can be shorter than a better quality muffler like the Hytech Loop.

I always considered the mugen twin loop rather subsized for any big performance mod's. Decent for a basically bolt-on only A3.

im gonna check out the hytech loop
for some reason I thought it was only obx and mugen that makes twin loop

EDIT: here it is
http://i730.photobucket.com/albums/ww304/MadLorGLK/hytech2520muffler2520005.jpg

[talonXracer]

The Hytech is far superior, it is what I have installed.

[MadLorEP3]

look what i found


Along with a ported Z3 head , SSR header(ceramic), RBC, MaxBored TB, and K2's I finally replaced the DC Sports muffler with the Hytech loop muffler.
http://i54.photobucket.com/albums/g96/talonxracer/IMG_0534.jpg

http://i54.photobucket.com/albums/g96/talonxracer/IMG_0649.jpg

http://i54.photobucket.com/albums/g96/talonxracer/IMG_0652.jpg

http://i54.photobucket.com/albums/g96/talonxracer/th_MVI_0653.jpg (http://s54.photobucket.com/albums/g96/talonxracer/?action=view&current=MVI_0653.flv)

At idle she sounds almost as quiet as stock. Stays fairly quiet till about 3500rpm's then starts to growl and then roars after 5500rpms. VERY CIVILIZED !

Very noticible gains from 2K up thru the mid range with no loss up top! Aids with drivability around town, cruising around at 1300-1600 rpms just like stock.

A real sleeper exhaust.

This Muffler and a KTeller 2.5" RSX kit with a 14" resonator would cost less than alot of JDM exhausts, sound awesome, attract alot less attention from the man, and sap no power for those that are looking for an exhaust who have a bit more than stock under the hood.

UPDATE 2/6/08

Decided to do a retune, here is a vid and dyno chart with the Hytech loop muffler vrs a DC sports can muffler.
Now the first dyno trace(dotted) is with the A2 head, Mugen headgasket, portmatched RBC and DC Sports muffler/can.
The solid trace is with the Z3 head, fully ported(polish on exhaust only), flatfaced valves, OEM headgasket, portmatched RBC and the DC can removed and the Hytech loop muffler welded on.
Both heads had K2's, the same SSR header and Maxbored TB with the same stock block. The stock HG removed the dips in the power curve caused by the Mugen HG and my set-up.
http://i54.photobucket.com/albums/g96/talonxracer/retunedynograph.jpg


AND here is a VID of a pull

http://i54.photobucket.com/albums/g96/talonxracer/th_MVI_0672.jpg (http://s54.photobucket.com/albums/g96/talonxracer/?action=view&current=MVI_0672.flv)

[ttttrigg3r]

hytech is really expensive though. bought header from them for h22 civic for 2g. Best quality exhaust piece I've ever seen though. So is there any twin loop cat back? or are they all axle-back.

[MadLorEP3]

hytech is really expensive though. bought header from them for h22 civic for 2g. Best quality exhaust piece I've ever seen though. So is there any twin loop cat back? or are they all axle-back.

I didnt realize that they are that expensive
how much do you cost

[MadLorEP3]

ok they cost about $899 for a rsx twin loop exhaust

so they are money but pretty much same price as other exhaust out there
But I read about people having to wait months to get their orders

[slate13530]

That Hytech exhaust sure does look sweet.

The wait is probably because they aren't mass produced, but don't quote me on that.

[usedep3]

I used to have an obx twinloop on my ep before it was totalled. I had it mated up with a 2.25" magnaflow midpipe and I thought it sounded an performed well. Def best bang for the buck. But like talon said the lifespan is def worse. I had the axleback on my car for a little less than a year and some of the welds were starting to crack. ESP by the tip of the exhaust. I would still recommend the obx muffler to anyone in the market.

[talonXracer]

I got the Hytech loop muffler by itself and had it welded into my existing 2.5" piping. The loop muffler by itself was around 350$. Your wait for just the muffler will be short, as long as John has them in stock, the wait comes into play when you purchase a axle/cat back exhaust that requires fabrication/assembly.
http://i54.photobucket.com/albums/g96/talonxracer/IMG_0534.jpg

http://i54.photobucket.com/albums/g96/talonxracer/th_MVI_0653.jpg (http://s54.photobucket.com/albums/g96/talonxracer/?action=view&current=MVI_0653.flv)

[MadLorEP3]

I got the Hytech loop muffler by itself and had it welded into my existing 2.5" piping. The loop muffler by itself was around 350$. Your wait for just the muffler will be short, as long as John has them in stock, the wait comes into play when you purchase a axle/cat back exhaust that requires fabrication/assembly.
http://i54.photobucket.com/albums/g96/talonxracer/IMG_0534.jpg




ok thats more like it
I can just have it welded onto my type s midpipe

did the tip come with the exhaust? In the first pic that i posted it didnt come with a tip