Recomendations for a quiet muffler
 

I built a 3" exhaust for my car. It's 3" wide open, resonator, no catalytic converter and has a Magnaflow muffler. It's loud as balls. I need a quiet muffler. Like the quietest 3" muffler ever made. Don't care if it hurts power I can't use the power around here with all the police as it's too ------- loud. 99' miata running naturally aspirated but will be turbo'd in a couple weeks. :y So what's the quietest muffler available? I've read Dynomax super turbo mufflers are quiet. Any others that might be quieter? I'm tempted to put the factory muffler back on cause it was pretty quiet but that would probably add a lot of back pressure after I get this GT3271 installed.

Re: Recomendations for a quiet muffler
 

walker 3" truck muffler

summit 3" oval muffler

Re: Recomendations for a quiet muffler
 

don't listen to that bullshit both those mufflers are ------- loud ricer cans

if you want a quiet good flowing muffler get a 3" turbo muffler

they are like $30 bucks

my b18b made 225hp 240tq at the wheels at 10psi with that muffler

Re: Recomendations for a quiet muffler
 

What 3" turbo muffler you talking about random-strike?

Here's a link to the dynomax muffler I was talking about. Things 90 bucks though...
http://store.summitracing.com/partde...5&autoview=sku

Or how about this SummitRacing 3" turbo muffler?
http://store.summitracing.com/partde...5&autoview=sku

Re: Recomendations for a quiet muffler
 

http://www.thrushexhaust.com/products.html

thrush turbo muffler, old school mufflers. they work good still and are quiet

Re: Recomendations for a quiet muffler
 

i have a thrush turbo on my wrx

http://www.youtube.com/watch?v=zWyL-8TKpv8

far from quiet. it's not a gm or a ls1 so johnny hasn't a clue

Re: Recomendations for a quiet muffler
 

thats it

Re: Recomendations for a quiet muffler
 

subu are loud pieces of ---- anyways

here is my turbo integra with a turbo thrush muffler

http://www.dragcityvideos.com/images/moviereelside.jpghttp://www.dragcityvideos.com/Videos...E9769969C0.jpghttp://www.dragcityvideos.com/images/moviereelside.jpg

Re: Recomendations for a quiet muffler
 

i would personally recommend your mom as a good muffler. i know she muffles most of my internal combustion's - beyatch.

Re: Recomendations for a quiet muffler
 

I put dual thrush mufflers on a old t-bird I did a 302 swap on few years back. Once they broke in they weren't that quiet. And from what I see, thrust don't make a 3" turbo muffler, 2.5" is the bigest they list.

Jesus, you ever tried or heard a summit turbo muffler?

Re: Recomendations for a quiet muffler
 

i'm running a summit turbo muffler on my D. The volume is reasonable, though somewhat louder than stock, but that is to be expected. Gives me headaches when cruising on the highway for extended periods of time but i'm not complaining. Being used to an open DP for months, this baby purrs.

Re: Recomendations for a quiet muffler
 

I'm running a summit "turbo" 2.5" on my turbo miata. It's quiet as all get out. Probably a bit TOO much backpressure but I've got a cut-out for when I need it.

Re: Recomendations for a quiet muffler
 

Just throw your turbo on. It should quiet down the exhaust a good amount.

Re: Recomendations for a quiet muffler
 

I've recommended a Dynomax welded Ultraflo to anyone who asked for the last 7 years. They are affordable, good build quality, flow as good as anything else but make less noise, and generally don't suck.

In the last 7 years exactly zero people have purchased one because it isn't a chrome ricecannon with a 5" tip.

Re: Recomendations for a quiet muffler
 

Thrush turbo.

I've put on on everything I own.

The T-100 has one and it sounds good.

Re: Recomendations for a quiet muffler
 

I <3 my 3" Magnaflow painted flat black tucked under the bumper with a 3" downturn (also painted black)

Re: Recomendations for a quiet muffler
 

enikolayev- my manalflow is the same way. Gives me headaches on anything more than a 15 minute drive. When I had the stock exhaust I could raw hide the hell out of the car and nobody noticed cause it was pretty quiet, and slow.

Slos13- You got any vids or sound clips?

I know the turbo will quiet it down some, though I don't know how much. Thing is I'm building a sleeper, so I want it quiet. Stock 2.5" exhaust tip will be going on whenever I change out mufflers. As it sits now it's got a 3" pipe out the back. Doesn't look stock at all.

Joseph Davis- Wouldn't the dynomax turbo muffler be quieter? I'm sure a baffled muffler flows better but quiet is more important to me. Sound police here are a bitch. They write you a ticket if they think your ---- might be loud.

Re: Recomendations for a quiet muffler
 

My exhaust is full 3" with a gutted 3" cat for looks. Turbo makes it really quiet. I mean it's still loud because it's a ricer Honda, but it's quieter than it would be NA with the exhaust. My turbo probably muffles more than my muffler.

Re: Recomendations for a quiet muffler
 

Baffles are a flow restriction, you want a straight pass through.

A turbo - the-o-rectally - operates as a third of a muffler. In reality, sometimes it acts as a muffler and other times it doesn't do anything. Your turbo manifold dictates most of this, and the length vs diameter of your exhaust dictates the rest. If you put it together and it's too loud I would recommend sticking a glasspack in the B-pipe as a resonator and if it's still loud try to add or remove a couple inches from the end of the exhaust. Also, big tips amplify noise, avoid that ----. Some people swear by downturns but if they aren't properly placed you just reflect noise off the ground and into your undercarriage so that your personal ride is loud.

Be careful, I've been in some cars that were fairly quiet inside, but you could hear from behind from a mile away. This is a great exhaust, IMO, but it is NOT stealth. Thermal R&D 3" for DC chassis Integra is great for this, the car is pretty quiet but everyone behind you experiences the sound and fury.

Re: Recomendations for a quiet muffler
 

Yeah, I've read "The Scientific Design of Exhaust and Intake Systems" a while back so I know a bit about exhaust stuff. But of course it's only part theory, and part real world experience. When I built my exhaust I kept it 3" everywhere w/ no tip and minimized bends.

The magnaflow is a straight through perforated tube w/ ---- around it to absorb sound. It works, but doesn't work enough. Also, I got a glass pack as a resonator already. Actually have 3 in a row after the down pipe, but didn't say that earlier to avoid ridicule... They help cut out the high frequencies and raspyness. I'll probably try the largest body'd 3" summit turbo muffler first as it's only like 30 bucks. Hopefully that will get the sound down more than this magnaflow. The magnaflow is fine at idle and low speed cruise, but when you open the throttle or cruise at highway speeds it's like there is no muffler.

EDIT: I'm running a 4:1 header right now but I'll be running a cast iron manifold when I turbo it. FWIW..

Re: Recomendations for a quiet muffler
 

Let me guess, you are in or past your mid 20s and that bumblebee tuna exhaust isn't the image or driving experience you care for. :P

You, sir, need to go back to a stock size muffler and one of Hi-Profile's DIY world's fastest e-cutouts. Or just use a $25 LS1 TB with a $7 T3 wastegate actuator so it comes open under boost.

Re: Recomendations for a quiet muffler
 

Yeah, i don't like loud ---- or anything flashy. I try to preserve the miatas cute gay image as much as possible. I may indeed try putting the stock muffler on and a cutout. Would be perfect for me really. And cheap too. What size are LS1 TB's? I like the idea of a 7 dollar wastegate controlling the TB. That would be sick.

Re: Recomendations for a quiet muffler
 

They come in a variety of sizes you can order from the factory, but 70mm is common which is right at 3". Mine was $33 after shipping on ebay. The wastegate actuator was about $11 after shipping from our very own Boosted_Stinkynuts. Good stuff. :6

Re: Recomendations for a quiet muffler
 

Had another idea while thinking about all this. Rather than reference the wastegate to intake manifold pressure, I could reference to pressure before the muffler. So whenever the muffler is causing a few PSI restriction, the waste gate opens the TB. But on second thoughts that wastegate might not handles the heat all too well. But I could deal with that in some way. Dunno, but this cutout/wastegate combination is probably my best bet in one form or another.

Re: Recomendations for a quiet muffler
 

I run a Moroso spiral flow on my car. I have a 2.5" downpipe, with 3" piping back from there, no resonator, no cat. The muffler is 3" in and 3" out. My car isn't EXTREMELY loud IMO, except at WOT but that is mostly because of the open dump wastegate. I always tell ppl if it's too loud, you're too old....but I HATE raspy sounding fart cans as well, so I see where you're coming from.

Re: Recomendations for a quiet muffler
 

I've got straight 3" pipe off my turbo straight back to a 3" thrush

loud as ---- outside, sounds great, not too loud inside very low

not recommended if you need "the quietest"

Re: Recomendations for a quiet muffler
 

get that 20 dollar summit racing turbo muffler. I have that on my vitara setup with 3 inch crush piping no cat, or resonator and still made 280whp on 15psi. Didnt hurt power at all. Pretty damn quiet too.

Re: Recomendations for a quiet muffler
 

Yes the ultraflo is tight ---- jd. My brother passed the sound checks at laguna seca with one on his turbo starlet

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I bought one to replace the tractor muffler on my csx but never put it on, the tractor muffler was a bad idea, it makes turbo dodges sound just like tractors which was uber gay, wish I would have put on the ultraflo before I sold the car so I could have heard it.

Your car will queit down a little bit once the turbo is installed I'd wait to change the exhaust until after you turbo it, or look for a mazdaspeed miata muffler.

Re: Recomendations for a quiet muffler
 

hey pat, i have a summit turbo 3" single in/out on my lincoln with no cats, resonators or anything else and my ---- is still pretty quite

Re: Recomendations for a quiet muffler
 

hands down the best muffler ive ever used/heard on a turbo car was the vibrant stealth mufflers. quiet and nice sounding. sure its 110 for the muffler but it blow a faggot magnaflow/dynomax/summit/thrush out of the water.

Re: Recomendations for a quiet muffler
 

Excuse me, riceboi?

Re: Recomendations for a quiet muffler
 

you heard me, fuckass.

Re: Recomendations for a quiet muffler
 

flowmaster 40 will rape you

Re: Recomendations for a quiet muffler
 

------ faggot foxbody garbage. perfect for 200whp v8's that get beat by stock b16's

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Flowmasters sound like ---- on 4cyls. A buddy in hs got a turbo back kit on his 1.8t... sounded like a ------- turd.. like a Gibson Jeep exhaust.

Re: Recomendations for a quiet muffler
 

sounded deep and smooth on my turbo 1.6

Re: Recomendations for a quiet muffler
 

http://www.deezteez.com/images/stories/43.gif

Re: Recomendations for a quiet muffler
 

3 inch Ebay turbo back, no cat, shitty resonator that comes with the exhaust, and a 2.5inch Ultraflow is quiet and sounds delicious.

Re: Recomendations for a quiet muffler
 

black boss porter?