I'm just wondering what cat back exhaust everyone uses for their LS Turbo setups, particularly with the Drag III turbo kit. I know that a turbo fitted exhaust will be loud regardless, but I want to minimize that effect by getting a quiter one.

Any comments will be of help

 

also let me add that I would sacrifice a little power for quietness.

 

Maybe Hytech can make you a 3" twin loop exhaust. Twin-loop design will definitely be quieter than straight-through design mufflers. If you're not going too crazy, I believe they already make a 2.5" version.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Takumi Fujiwara &raquo;</TD></TR><TR><TD CLASS="quote">Maybe Hytech can make you a 3" twin loop exhaust. Twin-loop design will definitely be quieter than straight-through design mufflers. If you're not going too crazy, I believe they already make a 2.5" version.</TD></TR></TABLE>

If you are going for quietness, deffinetly dont go for a 3 inch.

Unless you are planning on making massive power, three inch wont help all that much. Get someone thats 2.5 inch piping and a decent muffler.

check out https://honda-tech.com/zerothread?id=380727
buy the piping, cat, muffler, and have it welded together

 

id go with the greddy sp. maybe 2.5 inch. it is a really quiet exhaust and i hear that it is one of the best out there as far a hp gains, it ia also fairly cheap if you wanna know more check this out..... good luck man

http://www.optauto.com/webstor...=1191

 

I dunno what you guys are talking about. Run a huge *** resignator on that thing and you'll be fine with the sound.

Turbo cars SHOULD run 3" exhaust, especially if you run something serious like a Drag III kit.

Here's a Dyno for an n/a ITR. Shows it'll flow better with 2.5" piping. If it were a boosted ITR, it'd flow better with 3"


I believe any muffler shop can fabricate you a custom resignator or you can buy one from Greddy (used on the SP). I doubt the resignator kills any such performance in flow.

 

Apexi WS. I had a Drag3 on my LS with and a WS, at 6psi I ran a 13.8@103.5.

Perfectly quiet, very fast. Exactly what I was looking for.

Tom

 

[ Apexi WS. I had a Drag3 on my LS with and a WS, at 6psi I ran a 13.8@103.5.
Perfectly quiet, very fast. Exactly what I was looking for. ]

Indeed I have heard many WS set ups very quiet

 

the turbo itself is going to quiet the car down, I say try the 3" TRD exhaust. Does anyone know how loud that is? I've heard good things about it, but not how loud it is.

-Andrew

 

Thanks guys for the feedback. I will let you guys know on my progress.

 

Here's a novel idea... since its turbo and you've got lots of power... instead of a single pipe big enough to stick your arm in, why don't you get dual exhausts that are 2" or so each? This way you can have the high flow capacity and stock sound levels... this is what I'd want to do if I was turbo.

Ben

 

Turbo will quiet the car down.

Get 3 inch system, 22inch resonator, 3inch high flow cat, magnaflow muffler.

It should be pretty quiet. And if not, get another resonator.

 

How bout running a Dynomax ultraflo ss??? My friend has one, its a good muffler for its price and very quiet....plus it looks stock

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by integra-modder &raquo;</TD></TR><TR><TD CLASS="quote">

If you are going for quietness, deffinetly dont go for a 3 inch.
</TD></TR></TABLE>

The diameter of piping does not effect the noise of an exhaust.

The resonator(s), and muffler design does.

 

if your turbo .. almost all exhaust system quiets down alot

 

im running a 3inch thermal right now in my car with an 18 inch resenator. Its loud its not ricey loud but deep loud. My advice would be- decide what your hp goals are. If you think your going to stay under 250whp then you do not need to go bigger then 2.5 inches, any bigger would just be in increase in sound. I choose the thermal exhaust because my goal is for more than 250 whp, so that gives me play and dont have to buy another exhaust system later.

Running a cat can also quite things down a bit. There are alot of exhaust systems out there and im sure they all perform pretty well.

 

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VoltageBlue01 &raquo;</TD></TR><TR><TD CLASS="quote">also let me add that I would sacrifice a little power for quietness. </TD></TR></TABLE>
want it quiet and right for a turbo? turbo mostly use a 2.5" or 3" exhaust and how about the bov you'll hear with the turbo, don't think it could be stock sounding...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StyleTEG &raquo;</TD></TR><TR><TD CLASS="quote">

The diameter of piping does not effect the noise of an exhaust.

The resonator(s), and muffler design does.</TD></TR></TABLE>

im pretty sure thats incorrect

 

Has anyone thought about maybe a EVO 8 exhuast on a teg? I beleive they have a flap that is pressure activated to open when exhuast gets biult up, then stays down when your just tooling around town. Someone correct me if Im wrong, but what about taking that and putting it on your teg? (obviously it wont bolt right up, but hey, just buy that little part and fabricate something)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by integra-modder &raquo;</TD></TR><TR><TD CLASS="quote">

If you are going for quietness, deffinetly dont go for a 3 inch.

Unless you are planning on making massive power, three inch wont help all that much. Get someone thats 2.5 inch piping and a decent muffler.

check out https://honda-tech.com/zerothread?id=380727
buy the piping, cat, muffler, and have it welded together
</TD></TR></TABLE>

i thought that turbos didn't like any back pressure at all, why wouldn't 3in be a good idea??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Evilteg &raquo;</TD></TR><TR><TD CLASS="quote">

i thought that turbos didn't like any back pressure at all, why wouldn't 3in be a good idea??</TD></TR></TABLE>

Turbo's dont like back pressure, but I didnt mention back pressure. The reason you would avoid the three inch is due to the title of this thread, you want to stay quiet. The 3 inch has a bigger i.d. and keeps the resonance high... so you get a much louder tone...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
im pretty sure thats incorrect
</TD></TR></TABLE>

I am 100% positive it is correct.

Common misconception.

The diameter of the pipe does not amplify, or dampen sound waves. If you run a straight pipe back from the engine its going to carry the same noise level under a 3" pipe as it would a 4" pipe, it won't get louder.

If you have any poster rolls laying around you can test it. Hold a small and a large one up to a speaker and listen to both one after another, you will notice the decible level is the same.

As far as resonation you mention in your above posts, a quality exhaust will have resonationer(s).

My friends turbo GSR with 3" piping is one of the queitest tegs I have ever herd with aftermarket exhaust.

Don't tell him not to go to a proper sized exhaust on a TURBO car!? Even if it does make exhaust louder (which it doesn't), it would be much MUCH more effective to just use a chambered muffler.

Not shrink your whole exhaust tubing on a turbo integra.

 

thats new to me. Just wondering about testing your theory. Do exhaust waves travel the same as sound waves? And the way the engine affects the resonance of those waves....

-Andrew

 

I thought exhaust waves and sound waves completely are different. exhaust waves are considered transverse waves, almost like a fluid displacement.

sound waves can travel longitudinally, although restricted by the diameter of the pipe. not to mention exhaust waves dont travel at the speed of sound.

I would think that the diameter of the pipe MAKES a difference in sound level. Destructive interference from the smaller piping would be greater as the waves have less of a diameter to travel to change directions and cancel out another wave not in its phase. Bigger pipes would let more of the waves escape without cancellation, producing a greater sound.

Someone with great physics knowledge see if this makes any sense. I'm just guessing. Not too sure what role the resonator plays in all this.