Thread 28579730

What type of mufflers does /o/ use? Straight-through w/ packing? Chambered like flowmaster? Whatever thermodynamic voodoo Spintech does?

>>28579730 (OP)
I normally don't give a shit about someone running a straight pipe, but fuck sake, don't rav it every morning going through the neighborhood.

>>28579736
https://www.youtube.com/watch?v=ylhsbfQTPDQ

>>28579730 (OP)
stock

>>28579730 (OP)
Cat-back. Have a fondness for Fujitsubo.

>>28579730 (OP)
a cheap catback thats straight through. i live in a place where rust is rare so i didnt get the stainless.

Stock
>but muh 3 horsepowers
I don't care. Your hearing is a precious thing and every moment of noise above 70-75ish db is an amount of hearing permanently gone.

>>28579787
Time for bed gramps.

>>28579730 (OP)
Toob

>>28579803
eeeeEEEeeeeeEeeee

>>28579837
Dynamat, babeeeee

O
E
M

>>28579730 (OP)
I like cherry bomb glass packs. Cheap, sound good on any small block.

>>28579740
It's scientifically proven that there's a point just before permanent hearing damage that turns even the most noise hating Sunday morning grandma into a lover for BRAAAAAP.

>>28579730 (OP)
>Based SpinTech Enjoyer
They don't flow the best
They don't muffle the best
They don't prevent drone
But fuck do they sound amazing at WOT.

>>28579730 (OP)
3-chamber flowmasters used to be the thing, twenty years ago, if you wanted a spectacular sound and were willing to sacrifice some performance.

>>28579930
>They don't prevent drone
I'm considering getting a pair of 9000XLs for my subaru because any flowmaster bigger than a super 10 won't fit behind the axles
I figure it can't drone worse than no mufflers
also holy hell is that a dual 3.5in outlet?

>>28580273
If you have plenty of exhaust length, and two mufflers; the Spintechs are fine.
Also research "quarter wave resonator"

Mine is a dual 3in round in, and dual 3in Oval out.
The 2in and outs hurts the mufflers ability to dampen sound.
Sounds fucking amazing at WOT though.

I straight pipe my shit but have it side-exit on the passenger side so that its not droning loudly and bothering me.
there is not room under my car for a muffler.

>>28579754
splurged on a fujitsubo legalis-r, sounds probably only slightly louder at idle/around town but sounds great when you let loose

>>28579740
>people downshifting their vehicles to slow down means theyre trying to impress others

-Spintech 6000s on my cammed 5.3 and 6.0 LS engines.
-5.3 is full retard loud with longtubes, but a clean full retard.
-6.0 LS had a 14" straight thru magnaflow before, sounded ok performed better than the spintech but was way too loud and droney. The spintech sounds 10x better imo at the loss of a few HP.
-DC sports straight thru on my k20, Megan catback with Megan resonator. Sounds great, no rasp deep tone.
-Borla straight thru s-curve on the ol 5.7 SBC. Actually quite quiet with the stock manifolds and cam. Internal S curve thru the muffler body seems to absorb a lot of sound.
-Flowmaster (chokemaster) 40 on the stock 305 SBC. Sounds great.

>>28580607
These are really nice. Knew someone with one on an RB25DET Stagea

Has anyone made any advancements in muffler tech, maybe with 3d printing?

>>28579730 (OP)
Whatever the TRD Pro has on it. Pretty sure they use a spring bypass when there is enough pressure since it gets pretty loud over 3k RPM.

>>28579730 (OP)
I've got one like this on my van - straight through absorption type with a chamber in the middle, except the barrel is like twice the size of this one, and it's the absolute GOAT.
Basically no loss to flow and it quietens the exhaust down HEAPS.

I want to get another one for my other car but I can't find one anywhere because it was from a stock VW Amarok exhaust I bought off Marketplace, so I think I might try to make one myself.

>>28580771
The actual muffler
Piping is 2.75" for comparison so the barrel is probably about 9"

>>28580589

This looks fucking retarded

>t. Acoustic Engineer

>>28580771
>Basically no loss to flow and it quietens the exhaust down HEAPS
i need this

>>28579730 (OP)
Side-exit glass packs, true duals (with H or X pipe.) Sounds amazing at idle and low revs, sounds amazing at higher revs. Kind of droney on the highway but it's a big lifted jeep so that's not what it's for.

>>28579730 (OP)
OEM

>>28579730 (OP)
I prefer straight through (perforated pipe and packing) because it has the cleanest sound. Stuff like pic related always sounds like raspy trash. Chambered sounds a little better than pic related but still doesn't give as little rasp and buzz, but sometimes it's necessary to keep the exhaust from being obnoxiously loud.

>>28580783
Say what you want, but Spintraps work.
And fuck do they sound good.
A good blow through muffler is more efficient power wise, but not DBA or sound wise.

.t built three exhaust systems from scratch.

>>28580935
>more efficient power wise, but not DBA wise

Muffling is just trading power for DBA suppression.
How can a muffler be more efficient power wise but NOT more efficient DBA wise? Wtf do you mean by "more efficient power wise"? More power per WHAT?

>>28580816
"True duals" means dual pipes from exhaust maniforld/header back with no crossover.

>>28580589
How does that muffin tin work?

>>28581067
True duels sound best with an X pipe.

>>28581185
i feel like it depends on the car, H pipes just feel right on older classic v8s while x pipes fit better on something newer.

>>28579730 (OP)
I dunno, the oem one, because I'm not an attention seeking narcissist?

Everyone in this thread is a moolie.

>>28581505
wouldn't that mean you're now a moolie as well?

>>28580954
All engines need a little back pressure

>>28579730 (OP)
true dual exhaust with flowmasters
or you could go borladual exhaust
glass packs sound good on a v8 too

>>28581520
backpressure benefits only apply to 2 stroke engines

>>28581520
lol

>>28579740
literally my neighbors. They all look like this, and react this way

>>28581591
Trolling is an Art

>>28581508
Your straight-piped Z sounds like shit

Isn't the prime objective of the exhaust design to maintain energy?

>>28580954
That's not what I said.
Blow through stuff makes more power.
But has less influence in sound.

https://www.youtube.com/watch?v=azMxRlvEKnE

these on my cammed 4.8

Chamber muffler sounds poor

>>28581622
shaddap moolie

Quiet and full flow.

>>28582157
>Quiet
Sure
>Full flow
NOPE.

>>28581520
no

>>28581520
You want the freest flowing exhaust while maintaining maximum exhaust velocity. Back
pressure reduces exhaust velocity as much as having too large of a pipe does.

>>28579730 (OP)
lol open heads or ur a nocars pussie

>>28582020
Perhaps you mean space efficient?
Absorption mufflers are more efficient in terms of power loss per muffling, but baffle types are more spatially efficient? More noise suppression per cubic volume of muffler?

>>28582157
>full flow

>>28579787
https://www.youtube.com/watch?v=5keTM9eyCOg

>>28580935

Those flimsy little metal swirls aren’t going to do much to reduce sound energy and they’re going to rob a lot of power.

Large, straight through silencers with good quality packing (Acoustafil or similar) are the best performers all round. They need to be placed in the exhaust where a high pressure node exists to have the most effect. Most people just stick them wherever.

Flowmaster 40 series or Thrush.

I also have a set of stainless "Pypes" brand and they sound like crap- theyre just to loud and raspy.

>>28582556
Damn autism speaks.
Look up muffler types anon and come back.

>>28582601
Spin trap style mufflers are mid pack power wise.
Make more power than chambered mufflers.
But less than straight through mufflers.

>>28582666
These sound like the Devil

>>28582157
>>28582056
Turbos are the only muffler worth buying if you want the car to be somewhat quiet.
Other than that get some chinese magnaflows, or no muffs at all.

>>28582560
Yup, up size them and enjoy Full Flow dickhead.

Whatever came on my car because I'm not a boyracer who cares about being le heckin loud.

>>28582666
>paying 5 gorillian dollars for a stainless do nothing sound widget that no one can even see
amazin'

ones that make the most power

>>28582924
>that no one can even see
Oh he'll be showing the pics to anyone and everyone he can

>>28582924
poorfag cope
only reason not to use 304 stainless on aftermarket exhaust components is if you're gonna splurge for titanium

>>28579730 (OP)
a couple flowmaster, but I don't really like them. I'm going to replace the whole system with a 3" X pipe with dynomax bullets. The previous owner of my daily put a flowmaster on the 22RE. When I get around to working on it, I'm probably going to put the quietest thing on it.

>>28582934
>not inconel/carbon
you are poor

>>28582934
How much horsepower does the chromium add?

>>28582934
316 stainless is better than 304. as far as stainless goes, 304 is the "poorfag" option

>>28583054
which one is military grade? I want that one

>>28583066
The military uses many metals

>>28583066
The one your taxes paid for.

>>28583054
>as far as stainless goes, 304 is the "poorfag" option
I thought that was 409

>>28582925
Not trew duels

>>28583066

The military doesn’t use stainless in anything, it’ll be low carbon mild steel every day until you like it.

>>28583123
there are many options for poorfags

>>28583588
forgot pic

>>28582666
I know muffler types, you don't know what the word efficient means.

>>28583598
If your not concerned with noise, then go open headers?

>5.4 3v
>Full stock exhaust
>1 pair of cats
>Fuckhuge 9x32 muffler replaced with 28" glasspack
Nice deep tone and good totally reasonable volume increase (you won't get yelled at by the neighbors early in the morning), barely noticeable drone on the freeway even after break in. Excellent use of $38 in my humble opinion.

>>28583793
I am concerned with noise, I'm also concerned with power, which is why I choose the exhaust type which most efficiently trades power for noise suppression.

I like these. I've put them on every exhaust system I've made because they do a surprisingly good job of quieting it down without too much restriction or turbulence induced rasp. On my RX7 I used a "turbo" style muffler though, because wankels with <3 rotors sound fucking terrible and are obnoxiously loud, so I needed as much quiet as I could get out of the muffler.

>>28583130
True duals sound like ass, x pipe is better 10/10 times.

>>28583878
i had a straight through on mine but the droning was awful at 2000 rpm. it was just a cylindrical tube though - not like your pic where it's oblong and the pipe curves through the muffler body.

>>28580614
>ugh im just downshifting guys ugh
nigger

>>28582924
I have a fully built car with a neglected body.
Was having a couple vehicles transported across country when I moved and the truck driver was flabbergasted at the stainless exhaust, heim joints, anodized billet aluminum etc everywhere underneath.
Only time I've ever been complimented on that piece of shit (looking) car.
But its ok.
I know how awesome it is.

>>28579730 (OP)
Magnaflow on this car. It actually doesnt go to this model but it fits almost perfect. Sounds awesome too. Although I had some of the fiberglass packing string blow out of it so its louder than it was.

>>28579736
You dont stay in first giving the neighbors a wake up call at 4000-5000 rpms?

>>28579837
Wahhhhhhh pssssst chooooooo

>>28585351
THA WHISTLES GO WOO WOOOOO

>>28582595
Thanks grandpa I'm just going to watch 30 minutes of blabbering while you could have summarized the points.