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02-20-2011, 05:17 PM | #1 |
Drives: 08 yaris Join Date: Nov 2010
Location: MS
Posts: 51
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oem muffler dissection
i cut up a factory muffler this week , to see how it is made. it had 2 small "glasspak sections and a 180 bend in the pipe . not bad for flow. the bad part is a center divider with a small square door. it is spring loaded and was stuck almost shut. had to be beat open, this is after only 40,000 miles .
one could take a hole saw or large drill bit , make 1 hole in the rear of the muffler and perforate the divider to gain more flow. then patch the out side for a stock appearance. |
02-20-2011, 05:31 PM | #2 |
ULTIMATE
Drives: 07 Yaris Turbo Join Date: May 2007
Location: Canoga Park, CA
Posts: 14,859
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cool. glad someone did that so we could all see!
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Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific. |
02-20-2011, 07:00 PM | #3 |
Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009
Location: Angus, Ontario
Posts: 1,891
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lol? u did that at work? i recongnize the rollers on the work bench, lol
i have been planning to open mine up and basically gut it out to get a little deeper sound, does it look possible/practical?
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If it has boobs or wheels sooner or later your gonna have problems with it |
02-20-2011, 07:28 PM | #4 |
Drives: 2008 HB, A/T, Power W/L/M Join Date: Oct 2008
Location: LI, New Yawk
Posts: 2,063
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What's the deal with the hatch then?
Will the car still run if the hatch jams shut?
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02-20-2011, 08:27 PM | #5 |
Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009
Location: Middletown, NY
Posts: 1,502
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Interesting.
I was wondering what was inside one of those. Thanks for posting it. |
02-20-2011, 09:03 PM | #6 |
Drives: 08 yaris Join Date: Nov 2010
Location: MS
Posts: 51
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there is a small gap in the in-feed tube so that it can flow with the door closed. you could take a hole saw and drill from the top. if placed right it would sever the outlet tube, and eliminate the trap door. that would make it a single chamber muffler.
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02-20-2011, 09:17 PM | #7 | |
Drives: 08 yaris Join Date: Nov 2010
Location: MS
Posts: 51
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NOT ME !!
Quote:
http://www.summitracing.com/parts/SCH-42530/ |
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02-20-2011, 11:23 PM | #8 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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That trap door is supposed to be a performance thing. It's shut to keep the car quiet and maintain back pressure, but when you floor it the pressure is supposed to open it up allowing better flow at the expense of more sound. It's a pretty good setup when it works for a stock muffler.
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02-20-2011, 11:31 PM | #9 | |
Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009
Location: Angus, Ontario
Posts: 1,891
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Quote:
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If it has boobs or wheels sooner or later your gonna have problems with it |
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02-20-2011, 11:55 PM | #10 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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I'm just going off of the OP saying his was jammed shut. I'm sure it'll work forever on a regularly used muffler.
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02-21-2011, 12:40 AM | #11 |
Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009
Location: Middletown, NY
Posts: 1,502
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Another reason to go for WOT often.
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02-21-2011, 12:47 AM | #12 |
Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009
Location: Angus, Ontario
Posts: 1,891
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im sure mine isnt stuck, i life at WOT and still get amazing fuel economy considering
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If it has boobs or wheels sooner or later your gonna have problems with it |
02-21-2011, 01:02 AM | #13 |
Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009
Location: Middletown, NY
Posts: 1,502
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02-21-2011, 01:24 AM | #14 |
Drives: 2008 Polar White LB Auto Join Date: Oct 2008
Location: Metro Detroit
Posts: 1,238
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My yaris seems to like to suck down the gas if I jam on the gas pedal too much at WOT :(
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I live my life a quarter pounder at a time. And for those 500 calories or more, I'm free. I need FRIES! Two of them. The big ones. Oh, and I need them tonight. You're lucky the double shot of BBQ sauce didn't blow the seam on your nugget box. There she is, 2 pounds of pure beef. My dad ate it in 9.0 seconds flat. Check it out, it's like this. If I lose, winner takes my happy meal. But if I win, I take the burger and the toy. To some people, that's more important. |
02-21-2011, 01:41 AM | #15 |
Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009
Location: Angus, Ontario
Posts: 1,891
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what do u mean by "suck down the gas"? i drive my car exactly like how any insurance company thinks a 19y/o male would :) and i still get around 500 - 550km (340mi)per tank winter and 600 - 650km (400mi)per tank summer, i cant complain
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If it has boobs or wheels sooner or later your gonna have problems with it |
02-21-2011, 11:37 AM | #16 |
Obsessed with 1.5L
Drives: '10 PW Yaris Sedan Join Date: Feb 2011
Location: Westminster, MD
Posts: 907
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nice to know whats inside
its kinda like a DynoMax VT muffler
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02-21-2011, 12:41 PM | #17 |
Drives: 2008 Polar White LB Auto Join Date: Oct 2008
Location: Metro Detroit
Posts: 1,238
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Sucks down like if you were driving a triton v8 Ford engined vehicle and romping on it. Maybe it doesn't suck gas down that bad but I still get pretty dismal mileage and can't figure it out :(
__________________
I live my life a quarter pounder at a time. And for those 500 calories or more, I'm free. I need FRIES! Two of them. The big ones. Oh, and I need them tonight. You're lucky the double shot of BBQ sauce didn't blow the seam on your nugget box. There she is, 2 pounds of pure beef. My dad ate it in 9.0 seconds flat. Check it out, it's like this. If I lose, winner takes my happy meal. But if I win, I take the burger and the toy. To some people, that's more important. |
02-23-2011, 08:18 PM | #18 |
Drives: 2006 yaris Join Date: Oct 2008
Location: Puerto Rico
Posts: 536
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if you cut the loop and connect it directly to exit glass pack it will sound nice. This is one I made for a buddy of mine
http://www.youtube.com/watch?v=gIec-3LFs_A |
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