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Throatier Exhaust


findmuck

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I'm not a fan of exhaust at all. I find them to be very obnoxious and cant stand when people like the rattle can sound. However I do enjoy when crappy little Japanese cars, are ratty, low and have a throaty or Jap sounding exhaust! As I am planning my car to be like this! There is a craigslist ad for a magnaflow in my area and i was wondering if I should pick it up, and if I simply replaced the muffler from my wagon, with this one. Would it make it a bit throatier or jap sounding?!

Craigslist Ad:

http://losangeles.craigslist.org/wst/pts/4759558010.html

 

Desired Sound:

 

for second video skip to 0:45

 

I'm not expecting (or wanting) to get a extremely loud exhaust, but i just i want to have a nice throaty sound at idle! 

Any help or advice is appreciated ! Thank you !  :thumbup:

 

 

 

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You have an A series engine.  It will never sound like a 240z..it's an inline six. The '87 200sx could also be a VG30 but probably a 2.4 liter four cylinder.  Just because they have a magnaflow does not mean your car will sound like that. Take note the exhaust pipe diameter also.

 

 

Best bet is find a car like yours that sounds the way you like it and ask what they have.

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Yes Mike i understand this. Ive seen my friend Datmo's different exhaust setups in an inline 6 and 4 and know that the throatier exhaust comes from the sixes. But I was just wondering if I put a magnaflow muffler would it sound a bit throatier? Im not expecting to sound like an inline 6 240z with a full exhaust but just wanted to give out an idea. My apologies for not mentioning that in my original post. If I just cut off my muffler/resonator (as my friend suggested) and extended the piping would it sound a bit louder? Wouldn't this make me lose back pressure and make my engine less efficient? I have read the exhaust thread and they have constant debates about such things. Sorry for the noobness. 

 

You have an A series engine.  It will never sound like a 240z..it's an inline six. The '87 200sx could also be a VG30 but probably a 2.4 liter four cylinder.  Just because they have a magnaflow does not mean your car will sound like that. Take note the exhaust pipe diameter also.

 

 

Best bet is find a car like yours that sounds the way you like it and ask what they have.

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A cherry bomb type muffler ( the smaller one of the 2 sizes)  turned around backwards with a FULL tiny exhaust will give a sound almost exactly like the 120y in that video..

 

stock J13 mini motor of science,,,

 

 

 

 

 

 

 

  not sure why the dude in viseo can't shut up for more than a couple seconds ,, but whatever. :rofl: :rofl:

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That magnaflow will give a deep tone, may not be loud due to the 18" body, but not sure. Don't know what the internals are like on that particular magnaflow. The short walker muffler would sound like the above clip, close in loudness give or take 5-10 db's. Those can be had cheap, and are good mufflers.

Yea I looked at the walker mufflers and they sound good! Im calling around seeing how much those are + install at a shop! Thank you for the advice!

 

A cherry bomb type muffler ( the smaller one of the 2 sizes)  turned around backwards with a FULL tiny exhaust will give a sound almost exactly like the 120y in that video..

 

stock J13 mini motor of science,,,

 

 

 

 

 

 

 

  not sure why the dude in viseo can't shut up for more than a couple seconds ,, but whatever. :rofl: :rofl:

Lol some people just like to talk. Anyways, im gonna look into it! My frind has an extra one laying around so I might need to steal it from him lol. Thanks for the advice  :thumbup:

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Just avoid "fartcan" mufflers and glasspacks, they will give the undesired raspy, ricer sound. I second the Thrush/Walker turbo muffler. No need to buy an overpriced Magnaflow. It is not going to sound any better or last any longer. And here is some advice I learned a long time ago. The closer to the engine the muffler is, the deeper the sound, furthest away, the higher the pitch. Which is why ricer fartcans sound awful.

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Some thoughts on making sharp loud sounds softer and more mellow.

 

How to quiet the explosive sound of a shotgun blast or a series of blasts like a car exhaust? Well if you spread the explosion out over a longer time the bang isn't as sharp or loud. It's just a large puff of air compressed into a small space so if you let it expand and slow it down it will be 'quieter'.

 

No 'muffler' that is straight through will ever be quiet because the leading edge of the initial blast wave goes straight down a wave guide or pipe. Like talking to someone down a 50' pipe, it's very efficient and you only have to whisper. So to muffle the sound you need a barrier between the source and your ear drum. A series of baffles will cause some of the sound to slow and delay and arrive at the ear later. The more baffles the more the sound is delayed over time. It's the same energy just spread out and easier to handle than all at once. The baffles could be perforated with many holes each a tiny doorway slowing a crowd down to pass through.  

 

You could also have side chambers that allow some of the sound in to echo or reflect back out and interfere with the sound coming in. Like a crowd of people milling around looking for a way out. Overall it tends to cancel the energy flow in one direction, slowing and un-focusing it.

 

Fiberglass will absorb sound energy by diffusion somewhat like the tiny holes in the baffles mentioned earlier but does not rust out. It also prevents the outer case of the muffler from transmitting sound like a well padded wall.

 

If engines ran at the same RPMs and throttle the muffler could be perfectly silent or tuned to be just right for sound but it isn't.  What works at idle doesn't at high speed. Add to this the increasing resistance to air flow on the engine (I guess you could call this back pressure) and it having to work to push the exhaust out and resultant loss of power. Engines do not need 'back pressure' to run efficiently but some is inevitable with a quiet muffler. So the engine is tuned to work well with a small amount of exhaust remaining in the cylinder. Problems arise when the 'back pressure' is relieved by a lower restriction (louder) exhaust system and less exhaust is left and the mixture is less diluted and runs rich. Changes in pipe diameter can aggravate this also

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