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02-07-2014, 07:59 PM | #1 |
Drives: 2010 Yaris sedan silver Join Date: Jul 2012
Location: Massachusetts
Posts: 60
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Muffler Delete
Hey all, I'm playing around with the idea of replacing the exhaust from the axle back with just a pipe. I do however have a couple of questions. Have any of you tried this, and how was it for daily driving? My second question is does anyone make a bolt on pipe to replace the rear section so it would be easy to switch back if it proved undesirable ?
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k&N Pannel air filter Trd Exhaust Trd Rear Sway Bar |
02-07-2014, 08:43 PM | #2 |
It's the illusion you see
Drives: 07 Yaris Sedan Aero Join Date: Oct 2006
Location: Brossard, QC
Posts: 3,888
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It's going to be loud.
however, i've heard a yaris with a muffler delete, but the owner also did a split, about 2ft back, and loops it back into the pipe about 1ft before it ends. Not sure if you understand.. this will muff some of the noise. and it did sound good. |
02-08-2014, 11:30 AM | #3 | |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
Location: Los Angeles
Posts: 1,961
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Quote:
The sound waves are split up so that part travels another route which puts it out of phase with the rest. Then the out of phase waves are recombined and tend to partially cancel each other out. There are some mufflers that do this internally... ...and even some that do it with external pipes. Greg |
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02-08-2014, 10:05 PM | #4 |
It's the illusion you see
Drives: 07 Yaris Sedan Aero Join Date: Oct 2006
Location: Brossard, QC
Posts: 3,888
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02-08-2014, 11:57 PM | #5 |
Drives: 2010 Yaris sedan silver Join Date: Jul 2012
Location: Massachusetts
Posts: 60
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Thanks Illusion I had seen these, but still hard to tell how much louder it would be than my Trd when driving.
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k&N Pannel air filter Trd Exhaust Trd Rear Sway Bar |
02-09-2014, 12:07 AM | #6 | |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
Location: Los Angeles
Posts: 1,961
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Quote:
https://www.youtube.com/watch?v=YectX1tadpg |
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02-09-2014, 03:54 AM | #7 |
Drives: 2005 Toyota Vitz RS Join Date: Jan 2012
Location: Auckland, New Zealand
Posts: 181
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I removed the catalytic converter from my Corona and that made a difference to the sound and performance while keeping the stock muffler.
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02-10-2014, 06:08 AM | #8 |
Drives: Decepticon - Ravage Join Date: Nov 2008
Location: San Francisco
Posts: 1,462
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Does this help? Taken from 3ft away, revving to 3100rpm. After SeaFoaming the engine, there is no drone at highway speeds. (I cant prove this, but thats the only change during the time between the going from the Res-back to DC sport back to the Res-Back)
DC Sport Axleback: https://www.dropbox.com/s/h8l28gm71l...DC%20Sport.wav Resonator Back (straight pipe): https://www.dropbox.com/s/iesbvnv8xs...Res%20Back.wav
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Check out my Build thread: http://www.yarisworld.com/forums/showthread.php?t=52274 Last edited by ezhacker1; 02-10-2014 at 11:40 PM. |
02-10-2014, 05:03 PM | #9 |
Drives: 2010 Yaris sedan silver Join Date: Jul 2012
Location: Massachusetts
Posts: 60
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EZhacker1, I tried to play it and it says there's nothing there.
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k&N Pannel air filter Trd Exhaust Trd Rear Sway Bar |
02-10-2014, 05:36 PM | #10 |
ULTIMATE
Drives: 07 Yaris Turbo Join Date: May 2007
Location: Canoga Park, CA
Posts: 14,859
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It's not that loud, but it is louder than stock. I don't know an off the shelf replacement pipe -- you'd need a flange and some bent pipe, because the flange from the midpipe points up t the undercarriage.
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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. |
02-10-2014, 11:42 PM | #11 | |
Drives: Decepticon - Ravage Join Date: Nov 2008
Location: San Francisco
Posts: 1,462
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Quote:
DC Sport Axleback: https://www.dropbox.com/s/h8l28gm71l...DC%20Sport.wav Resonator Back (straight pipe): https://www.dropbox.com/s/iesbvnv8xs...Res%20Back.wav I plan to redo the testing. The recorder had bass cut on... so doesnt show the whole audio dynamic range. Hope to do more exhausts from people around me.
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Check out my Build thread: http://www.yarisworld.com/forums/showthread.php?t=52274 |
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02-11-2014, 01:35 AM | #12 |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
Location: Los Angeles
Posts: 1,961
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The straight pipe actually sounds pretty dang good!
Here's my Magnaflow exhaust with a resonator tip added to smooth it out more. http://www.youtube.com/watch?v=FL4CcjF8Z18 |
02-11-2014, 08:49 AM | #13 |
Drives: 2010 Yaris sedan silver Join Date: Jul 2012
Location: Massachusetts
Posts: 60
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Sounds good you guys.
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k&N Pannel air filter Trd Exhaust Trd Rear Sway Bar |
02-18-2014, 03:12 PM | #14 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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I've done it before. Made my own straight pipe from hacked-up bits from a spare Borla axle back muffler I had for my Echo. Sounds Ok, but a lot louder than running the Borla. I ran a header, stock mid pipe and the straight pipe. Sounds like touring car, if you've ever heard one on track. Matched with my 6 speed close ratios transmission it sounds pretty cool pulling on the the highway, but gets old fast, and I think it made less power than running the Borla for some reason.
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02-18-2014, 06:24 PM | #15 | |
Drives: No more Yaris Join Date: Dec 2013
Location: Montana
Posts: 180
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Quote:
The engine is designed to run with, and the microprocessors tuned to, running with a certain level of back pressure. Drop that back pressure and conditions are out of design specifications; and depending on the computer controls, it might read it as an abnormality and retard spark or enrich fuel. Lower performance. |
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02-18-2014, 06:29 PM | #16 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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Well the Borla is a straight through glass pack type muffler so the back pressure should be the same on both pipes. I have a feeling i didn't put the connection together tight enough and was causing some vibration through the exhaust causing the knock sensor to pull timing. It was mostly in the lower RPM range.
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