mufflers
09-15-2003, 04:51 PM
#3
Junior Member
Join Date: Sep 2003
Location: clovis,ca
Posts: 28
TRD Muffler
I want to put a better muffler on my xB but I want one with good sound. I'm not a big fan of the rice burner sound so I want something that wont sound like a bug flying around. Does the TRD muffler have a good sound to it?? Thanks.
09-15-2003, 05:33 PM
#4
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SL Member
Join Date: Aug 2003
Location: San Diego
Posts: 62
I was thinking of getting a muffler myself. I'm either going to go with a GTII exmag, mega power muffler, or hyper spec. All of which i believe are straight through mufflers. Is it true that getting a straight through muffler will make you lose hp and gas because it will mess with the obd sensor where your "check engine" light goes on. Also, i was recomended to get a chambered muffler since it won't cause that problem. Please help.
09-15-2003, 07:22 PM
#5
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Posts: n/a
I am using the Magnaflow mirrior finish muffler with a ___ tip. Here is the link to the pics. Just copy and paste the link to your browser.
http://scionxb.net/index_files/styli...is_exhaust.htm
It is completly quiet at high RPMs, of course I also had the entire exhaust system done as well.
http://scionxb.net/index_files/styli...is_exhaust.htm
It is completly quiet at high RPMs, of course I also had the entire exhaust system done as well.
09-16-2003, 01:52 AM
#6
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Join Date: Aug 2003
Location: Austin, TX
Posts: 424
I would suggest reading this article, i wish they would publish all 7 parts, but the few they have up are really informative
http://www.sportcompactcarweb.com/te...scc_ssbbpart2/
http://www.sportcompactcarweb.com/te...scc_ssbbpart2/
To get the least amount of backpressure, most of the good, high-performance mufflers available today have what is called a straight-through design. These type of mufflers quiet the exhaust by the absorption of high frequency vibrations in a heat-resistant packing usually consisting of stainless steel mesh and heat-resistant ceramic fibers. They typically have a straight inner core with no baffling at all, much like a straight pipe with many small holes. The pipe is louvered or perforated when it passes inside the muffler's shell, allowing sound energy to pass through the holes but leaving the exhaust gas flow unimpeded. You can see straight through these types of mufflers. The louvered or perforated core is usually wrapped with either Fiberglas wadding, hence the old-school term Glass-Pack or on the better mufflers, stainless steel mesh to help further absorb the sound. On straight-through mufflers, the longer the muffler, the quieter it is. The length usually has no effect on the backpressure, just the noise output. These mufflers work in the same manner as the silencers used on guns. If a silencer impeded bullet travel, you would definitely have problems!
09-16-2003, 04:03 AM
#10
Junior Member
Join Date: Jul 2003
Posts: 1
I have the trd muffler on my xB. It sounds great, but the one thing I can't stand is that it's not anywhere near centered where the groove is cut for the exhaust tip in the rear bumper. In fact the tip is like a millimeter or two shy of touching the bumper. That's kinda lame considering it's made by TRD. I figured that they'd have the best fit for their own cars. Oh well. Anyone dealt with this and/or know how I can fix it?
09-16-2003, 05:00 AM
#12
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sIcKsCiOnS
Scion Evolution
Join Date: Jun 2003
Location: Chicago, IL
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09-16-2003, 05:54 AM
#13
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Scinergy
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Join Date: Aug 2003
Location: W. Covina, CA
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don't worry about the ricey sound. Just go to a good muffler shop and choose which ever looks best because the resonator will give you a good, deep sound regardless of which muffler you choose for the scion. Obviously don't choose a cherry bomb muffler. I have the bomz racing muffler and I love it.
09-16-2003, 02:00 PM
#14
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Thread Starter
Join Date: Jul 2003
Posts: 148
for those who don't have a centered muffler, you can help get it to center if you twist the muffler tubing where it meets the oem tubing with the clamp. try twisting it and retightening the oem tube to center the muffler. that's what i did to center the muffler tip.
09-18-2003, 04:12 AM
#16
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Join Date: Sep 2003
Location: 909 SoCal
Posts: 11
exhaust backpressue
exhaust backpressure is a not quite so acurate term. in an exhaust system what is important is the timming of the energy pulse that moves through the entire engine, from the end of the intake to the very end of the exhaust. whew. when that pulse reach's the end of the exhaust it returns in the opposite direction. if it reach's the exhaust valve while the valve is off it's seat it slows , and/or in some cases reverse's the flow all the way back out the intake. that phenomon is known as reversion.
intake length , cam timming , and exhaust length & diameter [ i.e. backpressure] all share a part in an engine's performance at any given time. so you got to work that thing between your ears and do your homework and getz shiznitz that works together. i.e dyno tunning backed up and verified at the track. and certified with an accelorameter.
tha tha thats all folkz
remember , just because you dont see them dosen't :? mean they aren't WATCHING you
intake length , cam timming , and exhaust length & diameter [ i.e. backpressure] all share a part in an engine's performance at any given time. so you got to work that thing between your ears and do your homework and getz shiznitz that works together. i.e dyno tunning backed up and verified at the track. and certified with an accelorameter.
tha tha thats all folkz
remember , just because you dont see them dosen't :? mean they aren't WATCHING you
09-19-2003, 07:50 PM
#18
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Join Date: Aug 2003
Location: Austin, TX
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SammyPsycho: I was under the impression that the reversion wave became indeterminant after the header and going into the first catalytic converter. i.e. the wave going back up the pipe anywhere past the cat wasn't going to do much in the way of scavenging exhaust from the cylinder. Just curious, that was the impression I had gathered from reading not just that article but others as well. I'm all for tuning, but is there a point (along the exhaust, such as headers, or cats or even going out to the muffler) where tuning the exhaust system doesn't provide any noticeable benefits?
09-19-2003, 10:53 PM
#19
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Scion Evolution
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Location: SE So Cal
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I have a quick question...
I just want to install a muffler...not the whole cat back at this time. Is there any decent and nice looking "bolt-on" muffler for the xB?
Looking for something that has a throaty deep sound ..rather than a high pitch screamer.
Let me know...
I just want to install a muffler...not the whole cat back at this time. Is there any decent and nice looking "bolt-on" muffler for the xB?
Looking for something that has a throaty deep sound ..rather than a high pitch screamer.
Let me know...