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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 09-16-2011, 10:31 PM   #1
honeybucket99
 
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Ehaust Gas Temperature at Muffler?

Anyone know or have a good guess? I am trying to build a band stop filter to kill the 149.2Hz noise that is killing my hearing, and my calculations for length and volume are off due (I think) to the speed of sound in the heated air. If anyone has an educated guess, I'd be much obliged.
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Old 09-19-2011, 12:46 PM   #2
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Remember it's going to change based off of outside air temp, load, throttle position, gear, MPH...

Even at the cylinder head exhaust gas will change 400-1800 degree's.
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Old 09-19-2011, 12:53 PM   #3
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look up Helmholtz chamber. You can build yourself a bandpass filter (of sorts) that way. Make the chamber the right length to reflect the inverse of the incoming 149Hz wave, you will cancel out most of the sound. No need to build an actual bandpass filter. There are lots of online calculators for this as well because this is commonly done for noise cancellation.
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