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Old 11-21-2013, 08:57 PM   #1 (permalink)
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Mufflerectomy on rolling road (Audi TDI)

To satisfy my own curiousity, here's what happened when I tested a rear silencer delete on my Audi TDI. No remap done here, just removing the restriction in the exhaust by chopping it off.

I'm not sure if more power is a good thing for economy, but it's still a good thing.


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Old 11-21-2013, 09:08 PM   #2 (permalink)
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Nice work
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Old 11-21-2013, 09:11 PM   #3 (permalink)
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But, what does the "Noise Abatement" crowd say about such things?
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Old 11-21-2013, 09:13 PM   #4 (permalink)
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Lol I wouldn't know. It's still not loud enough for me!
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Old 11-21-2013, 09:14 PM   #5 (permalink)
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On a turbo diesel noise doesn't increase by much I (and others) found.
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Old 11-21-2013, 09:39 PM   #6 (permalink)
40-60-40 MPH P&G
 
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if the fuel economy is not affected and the sound not too loud I would consider doing it for weight saving and rear belly pan upgrade
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Old 11-22-2013, 02:57 AM   #7 (permalink)
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I removed my muffler on my TDI as well, and added a straight pipe:


The turbo already reduces the sound a great deal on its own... without the muffler, I can hear more of the turbo whistle and a little more rumble, but a casual observer (not familiar with TDIs) wouldn't notice the lack of muffler. I didn't remove the muffler for FE or power purposes; I removed it because I really wanted to hear more of the turbo. Ya, I know, soft in the head & all that...
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Old 11-22-2013, 04:25 AM   #8 (permalink)
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There are two other videos which may be of interest - a sound comparison, and a video of the internals of the muffler:



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Old 11-22-2013, 06:18 AM   #9 (permalink)
It's all about Diesel
 
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Since it provides a better exhaust flow and saves a few weight, it's a good measure for MPGs.
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Old 11-22-2013, 08:25 AM   #10 (permalink)
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Turbo diesels aren't really all that loud when you go mufflerless. Unless you dump a three-inch exhaust on that bad-boy and pull off whatever particulate filter is on there...

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