Exhaust sound "scientific" testing - Toyota Yaris Forums

ezhacker1 · 01-25-2014, 09:37 PM

For fun, I did a little exhaust note test @ Idle and 3100RPM. Hope this will help people find exhaust they want.

Car Specs:
No Boost
AFE Intake
50400miles on the ODO
OEM everything else engine/exhaust related besides the tested items

Setup:
Engine warmed up to normal operating temperatures ~175F from my reading
3 feet distance from bumper inline with the exhaust
48khz 16bit. Manual mic level. Only after the fact did I realize, i had both a compressor AND high pass filter on at 237Hz on all of them, so not sure how that may affect the bass of each exhaust, massive Fail on my part.
*I do not have a stock exhaust to test to set a baseline.

Tested:
Muffler Delete (No pipe): https://www.dropbox.com/s/8c16khmt24...0No%20Pipe.wav
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

01-25-2014, 09:37 PM	#1
ezhacker1 Drives: Decepticon - Ravage Join Date: Nov 2008 Location: San Francisco Posts: 1,462	Exhaust sound "scientific" testing For fun, I did a little exhaust note test @ Idle and 3100RPM. Hope this will help people find exhaust they want. Car Specs: No Boost AFE Intake 50400miles on the ODO OEM everything else engine/exhaust related besides the tested items Setup: Engine warmed up to normal operating temperatures ~175F from my reading 3 feet distance from bumper inline with the exhaust 48khz 16bit. Manual mic level. Only after the fact did I realize, i had both a compressor AND high pass filter on at 237Hz on all of them, so not sure how that may affect the bass of each exhaust, massive Fail on my part. I do not have a stock exhaust to test to set a baseline. Tested:* Muffler Delete (No pipe): https://www.dropbox.com/s/8c16khmt24...0No%20Pipe.wav 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 __________________ Check out my Build thread: http://www.yarisworld.com/forums/showthread.php?t=52274 Last edited by ezhacker1; 02-10-2014 at 11:43 PM.

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