Custom Exhaust. Muffler or Resonator?

[v8s_are_slow]

Okay, I'm preparing to make my side exit exhaust next month (exiting the bumper). Now I have an ATR muffler I "plan" to use if it'll fit cause I already know it sounds totally awesome. BUT, if it doesn't fit, I need to go with a plan B. Now I'm not concerned with the volume as much as I am the sound. I kinda hate the BLAHHHHH sound. More prefer the GRRRR sound. Know what I mean? Lol. Anyway, if I have to order something, I'm wondering if I'd be better off going with a race muffler or a resonator. Any opinions? Not really sure what the difference would be but here's what I have in mind if it helps any.

Muffler

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Resonator

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P.S. I always thought the muffler was there to quiet down the noise so have always been kinda confused as to the function of the resonator. Sounds to me like they both do exactly the same thing???

 

[dragonsl8r]

Thought i could help clear up your understanding a little about the differences between resonators and mufflers. I'll start with resonators: think of them as a tuned frequency tube. The length, diameter,and internal design will only allow a portion of the incoming sound wave frequencies to reach resonance and pass through at a given sound wave velocity.

A good example is at 3000 rpm my exhaust has a deep continuous drone (3" from the o2 housing back) no resonator or cat. If i were willing to except a slight loss in power i could install a resonator designed to kill the unwanted frequencies of the exhaust gas sound wave at that rpm.

Remember the slight power reduction i mentioned above is mostly do to heat energy loss so be sure to place your resonator as close to the end of the system as possible.

Hopefully this helps. I can go into greater detail if you need it. Getting sleepy I'll do mufflers later.

P.S. the type and tune of your resonator can help with your quest for GRRRRR

 

[v8s_are_slow]

Thanks so far. And since this will be a side exit exhaust, I'll only have one place to be able to put this thing. I know I'd like to change the sound but with as little power loss as possible. Just not sure which one to go with and how each one will sound.

 

[ineedagsx]

just go straight pipes , i had a borla resonator on my rx7 and it gave it a really nice muscle kinda sound if that helps.

 

[1gDSM4g63]

If you going to do side exhaust there is almost nothing you can do the tone, besides it doesn't sound too bad and I doubt you're going to daily drive it.

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[v8s_are_slow]

I doubt you're going to daily drive it.

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Heh, yeah right. Lol. That's a nice unique design on the exhaust though. How much did it run ya to get that done? Wishin I could hear some sound clips of that thing or something. It's really hard to know what to do without actually hearing something ya know? And I'll be the only one around here going this route. Not many people really do it ya know? Is yours a 3 or 4 inch pipe? Just thought I'd ask.

 

[TSIfreek]

I woudnt do a resonator. I would just do a magnaflow race muffler and be done with it. It wont be to loud as the magnaflows do very well at quieting down noise at the end of the exhaust. The little mufflers you have posted wont to anything for muffling the noise. Its made more for tracks that require some type of muffler top pass inspection.

 

[1stGenTSi]

There's a thread/blog floating around here somewhere of a 2g with 4'' side-exit and a small race muffler. I can't remember much else about the thread so I'm having trouble finding it. It looked pretty damn good as I recall.

 

[1gDSM4g63]

Heh, yeah right. Lol. That's a nice unique design on the exhaust though. How much did it run ya to get that done? Wishin I could hear some sound clips of that thing or something. It's really hard to know what to do without actually hearing something ya know? And I'll be the only one around here going this route. Not many people really do it ya know? Is yours a 3 or 4 inch pipe? Just thought I'd ask.

None many people go the route because it's not street legal and can be a disturbance for people with the loudness when your throttling it.

It's a full 4" piping and the fabrication took 5 hrs x $105 = $525 with a little over a $100 in parts.

What is the turbo setup that you're using this on?

 

[v8s_are_slow]

I woudnt do a resonator. I would just do a magnaflow race muffler and be done with it. It wont be to loud as the magnaflows do very well at quieting down noise at the end of the exhaust. The little mufflers you have posted wont to anything for muffling the noise. Its made more for tracks that require some type of muffler top pass inspection.

Why wouldn't you do a resonator? You didn't really give any reasoning behind your answer.

There's a thread/blog floating around here somewhere of a 2g with 4'' side-exit and a small race muffler. I can't remember much else about the thread so I'm having trouble finding it. It looked pretty damn good as I recall.

Wish you knew where it was.

None many people go the route because it's not street legal and can be a disturbance for people with the loudness when your throttling it.

It's a full 4" piping and the fabrication took 5 hrs x $105 = $525 with a little over a $100 in parts.

What is the turbo setup that you're using this on?

Not so worried about how loud it is as I am the overall sound. The cops really aren't bad about that around here. I had a really short exhaust on my 1g and the Mustang's around here are way louder than what mine was. If it wasn't an annoying sound to me, I'd probably just leave it a straight pipe, but I also don't know what that sounds like on a dsm to do that. I mean if it sounds just the same as just running a downpipe, then I get the idea, and I hate the way that sounds. Not really worried about the cost involved. Just wanting it done. I'll pay $500 or whatever so long as it's exactly how I want it.

Is it possible for you guys that have em to post up a video or something of it running? Sure I'm not the only one that'd like some sound clips on this. Thanks.

Oh yeah, I'm just running a T-28 for right now. At least until I break the current record, then I'll upgrade.

 

[v8s_are_slow]

Anyone there?

 

[1gDSM4g63]

Is it possible for you guys that have em to post up a video or something of it running? Sure I'm not the only one that'd like some sound clips on this. Thanks.

Oh yeah, I'm just running a T-28 for right now. At least until I break the current record, then I'll upgrade.

Here is bidlady112 Holset HX52 turbo on a 1.6L 4g61 on an open startup which is pretty much like my HX52 sounding except my is rougher because of the cams. Not to shabby right? Just by that that should let everybody know that it'll eat up those weed whacking Honduhs up!!

I may put a clip up when it's done tuning in the Spring time. Although you may want to reconsider your idea of going to a side exhaust on a small t-28 turbo. A severe boost creeping may be a huge factor for you.


YouTube - Holset HX52 second start up

 

[v8s_are_slow]

Well, that's totally open. Not really what I have in mind. I'm talking about side exit "exhaust". Thanks for the effort though

 

[Jankenshank]

there's going to be pretty much no difference in sound between straight open turbo and/or downpipe and side dump.

people dont just run straight open as the engine need some sort of back pressure and we dont want all those HOT exhaust fumes just sitting around in the engine bay.

or are you talking about rear side exhaust.???

 

[knochgoon24]

there's going to be pretty much no difference in sound between straight open turbo and/or downpipe and side dump.

people dont just run straight open as the engine need some sort of back pressure and we dont want all those HOT exhaust fumes just sitting around in the engine bay.

or are you talking about rear side exhaust.???

The engine doesn't need back pressure. It's a myth that has some truth in carbureted car, but none at all with EFI.

The truth about exhaust backpressure and torque

 

[1gDSM4g63]

Well, that's totally open. Not really what I have in mind. I'm talking about side exit "exhaust". Thanks for the effort though

Biglady112 did build a side exhaust later, that was just a test when he had put in the HX52 but you got to worry about boost creeping. I don't what exhaust you're using now but 3" exhaust or even removing the cat may cause creeping.

 

[wolfie359]

Well, if you wanted to go duel exhaust, 1 out each side, you could run 2 small GSXR 1000 Race Mufflers. They might be small enough.

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Might wanna search around for the right size, fit, and sound. I still like the straight pipe idea, btw... The right V8's aren't slow

 

[Sp1kE]

I don`t know how many times i`ve said this on this site.
BUT... Its ALL in the RESONATORS!
My apexi exhaust sounds almost identical with the muffler on, or off.
My muffler only quiets the `slap` sound.
If I unhook the exhaust before the resonators, it sounds like a tractor.

 

[falcon8r]

I have used many different mufflers in the past to meet sound requirements for SCCA on a Ralt/Cosworth race car. I tried very small flowmasters, Supertrapps with poor results. The best was a small muffler made by Force5 racing. It was the quietiest and best on the dyno. It was supplied by Paul Hasselgren's shop in Berkely Ca. IMHO, it will be no fun trying to be stealthy late at night. The turbo itself will do some to taim the noise, but power is noise. The more you make the louder it gets. NOW on a dark planet somewhere...Trade to some quite as a stocker, muffled& turboed ls1's that will run 9's @ 150+mph. I go as quiet as possible with my rides. Check my pics. My system is still not quiet.. but enough and it is a very good 3" system. The bonus is the man leaves me alone. Tres

 

[v8s_are_slow]

Biglady112 did build a side exhaust later, that was just a test when he had put in the HX52 but you got to worry about boost creeping. I don't what exhaust you're using now but 3" exhaust or even removing the cat may cause creeping.

Eh, if I get boost creep too bad, I'll just get a better wastegate. Right now, my cat is gutted and I cut the exhaust off after the 1st resonator. It actually sounds decent but a lil quiet and it's still small, crappy stock piping.