trendy muffler experience?

Twin loop mufflers have apparently been a bit of a fad with the JDM crowd. I just found out about them a few days ago.

I can see the drawback right away with the 360 degrees of bends in the tubing but……

My main problem is that my exhaust is far too short. Under 24” from the turbo I would guess. I am willing to give up my fashionable ansa as well.

I bet one of them there fancy schmancy JayDeeM twin loops would do wonders to cut down the volume. I have found them in 2” pipe even. If it would fit in the bay that is. I bet after removing the oversized tip it might not even look terrible.

Tired of my ears ringing after time on the freeway, tired of feeling that the neighbors hate me when I leave for work at 5:30AM. I just need to quiet it down a bit.

Does anyone have any experience with these cheap and cheesy twin loop mufflers? Run away? Inexepensive way to cut volume in a tight space?

If they're trendy with the jaydeeyem crowd, I can't imagine that they do a damn thing insofar as actual sound deadening.

Looks like a good way to add some useless weight.

They are stock on an S2000 and yes they do a lot towards sound attenuation.

Hmmmmm. Too loud, you say? My RX-7 Turbo runs a 3" pipe straight to a 3" Borla XR-1 race muffler. It's not quiet, but it's not exactly loud either. I always figured that a turbo was all the muffler anybody ever needed.

If your primary concern is quietness and you're that severely limited on space, maybe it's worth a try?

Have you looked up clips on youtube?

Isn't every 90* bend the equivalent of 1 foot of piping for restriction? One of those little "facts" I remember from my HS shop teacher a couple of decades ago.

BMW does the opposite on the e39 528. Twin mufflers, but only one has an outlet.

Is it really that loud?

My "exhaust" on my turbo car consists of a two and a half foot long 3" straight pipe off my turbo out the side of my bumper.

It's not that bad at all.

But as for the twin loops, they aren't that small... see if you can get measurements first, i don't know how i would ever fit one in my engine bay, but you may have quite a bit more room in your car.

I think i know of a few guys running Banks mufflers of some sort on their turbo cars with a side dump.

http://kalecoauto.com/index.php?main_page=product_info&cPath=1&products_id=3 ???

1988RedT2 wrote: Hmmmmm. Too loud, you say? My RX-7 Turbo runs a 3" pipe straight to a 3" Borla XR-1 race muffler. It's not quiet, but it's not exactly loud either. I always figured that a turbo was all the muffler anybody ever needed.

That's what I thought to until I put a 4" turbo back exhaust on my turbo diesel truck with no muffler.......it is LOUD. I don't normally mind loud and I'm planning on adding a muffler.

What's the path the gases take in the twin-loop muffler? Is it essentially two mufflers in one housing?

If the loop takes up too much room due to shape and you want to try making something you could try hacking a dual in / dual out muffler into one of these. You would have more packaging flexibility since you could make the loop on one side and in/out on the other. Check the flow through the muffler obviously, don't want exhaust trying to go in and out the same hole.

ransom wrote: What's the path the gases take in the twin-loop muffler? Is it essentially two mufflers in one housing?

Just as it looks. I found one that is actually two mufflers instead of one can

It looks like an interesting packaging solution to me.

92CelicaHalfTrac wrote: Is it really that loud?

My wife can hear me gently leave the stop sign 4 blocks away when she is in the house.

It is loud. The turbo definately helped, but it is still loud.

Length of tubing has attenuating properties. I have very little length in mine.

I like these early attempts at twin loop, and they work VERY well.

The way it looks designed, it look like it's supposed to provide good flow with extra sound deadening.

Zomby woof wrote: I like these early attempts at twin loop, and they work VERY well.

Theoretically, I'd expect this design to provide more sound deadening in a smaller package than a twin loop. The twin loop design has one of the three lengths of the muffler not doing anything to deaden the sound, whereas the turbo muffler uses all three passes back and forth.

I would see if Burns stainless has anything that will fit your needs. The GRM piece on their exhausts sold me on them 100%.

From my little bit of reading up on exhaust, most of the benefits of straight through mufflers are lost once you get past the first resonator/catalytic/turbo. You get more muffling in a smaller package with non straight through mufflers and a properly sized one shouldn't hinder flow enough to sap power.

can't you just do what some of the AC bug crowd do... and I did with mine.. a glasspack across the back of the car? Look it down off of the turbo, then a bend towards the middle of the car.. and then a muffler of some sort and a tip to throw the fumes straight out the side of the car

Cotton wrote: That's what I thought to until I put a 4" turbo back exhaust on my turbo diesel truck with no muffler.......it is LOUD. I don't normally mind loud and I'm planning on adding a muffler.

My Cummins came with a 4" turbo-back straight pipe. It was loud. My PA inspection shop said I had to install something for them to pass it... so I bought a stainless straight-through muffler/resonator (forget which brand - it was cheap) and installed it roughly in the stock location under the bed/cab area.

It satisfies the inspection requirements, but it's still loud. My g/f swears it didn't do a damn thing.

mad_machine wrote: can't you just do what some of the AC bug crowd do... and I did with mine.. a glasspack across the back of the car? Look it down off of the turbo, then a bend towards the middle of the car.. and then a muffler of some sort and a tip to throw the fumes straight out the side of the car

^This. I dont have any good pics of it but we were kind of in the same boat with making the Wartburg rear engined. There's just no pipe length there. Our header dumps into a camaro single in dual out muffler that is standing up right instead of flat, behind the back bumper. That plus a couple of resonator tips and people have told us our car it too quiet (not inside where there is no sound deadening but outside its fairly sedate)

ditchdigger wrote:

92CelicaHalfTrac wrote: Is it really that loud?

My wife can hear me gently leave the stop sign 4 blocks away when she is in the house. It is loud. The turbo definately helped, but it is still loud. Length of tubing has attenuating properties. I have very little length in mine.

Wierd.... mine is hardly longer than yours, and a much bigger diameter.

92CelicaHalfTrac wrote: Wierd.... mine is hardly longer than yours, and a much bigger diameter.

Bwaaahaha

dculberson wrote:

92CelicaHalfTrac wrote: Wierd.... mine is hardly longer than yours, and a much bigger diameter.

Bwaaahaha

OH HEYOOOOOOOOO