Episode No.505 - Mufflers & Silencers

Check out the complete course at www.howacarworks.com/video-co...
This episode has everything you need to know about the exhaust muffler, or in British English, the silencer. We cover what it does, why it's needed, and then chop a muffler up and see what's inside. I also talk about exhaust back pressure and the differences between turbo muffler, absorption or straight-through mufflers, and finally we look at chambered designs.
00:00 Why is a muffler needed
00:58 Engine noise
02:16 Acoustic tuning
04:05 Different engines. Different sounds.
05:06 Dissecting a muffler
09:36 What's inside
10:03 Difference between noise and gas movement
11:36 Absorption and Reflection
15:11 Straight-through muffler
15:39 Turbo mufflers
15:57 Exhaust back-pressure
21:42 Why mufflers corrode so quickly
23:27 Chambered muffler
24:15 Active exhaust systems

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17:30 It's called a turbo muffler because the first production example of the muffler design was used on the 1965 Chevrolet Corvair Corsa Turbo.

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I thought the turbo muffler is just a mod to the standard baffled muffler designed to improve airflow and (completely by accident) and to not cut the sound of turbine so much. Guess I was wrong.

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@@howacarworks There's a lot of things people sell as "turbo" mufflers, but it'd seem like that phrase is used more for non chambered fiberglass packed straight through or multi pass mufflers. You kept calling the chambered muffler a turbo muffler and it was kinda confusing. To me the resonator you have is more of a "turbo muffler" than that thing.

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@@TheBreaded Maybe ill try it. I have it unhooked now.. I just don't think compressed air is going to blow it out. It has too many turns.

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[@howacarworks]

A tiny part of our bigger project - get the whole thing at www.howacarworks.com/video-course Contents: 00:23 Why is a muffler needed 00:58 Engine noise 02:16 Acoustic tuning 04:05 Different engines. Different sounds. 05:06 Dissecting a muffler 09:36 What's inside 10:03 Difference between noise and gas movement 11:36 Absorption and Reflection 15:11 Straight-through muffler 15:39 Turbo mufflers 15:57 Exhaust back-pressure 21:42 Why mufflers corrode so quickly 23:27 Chambered muffler 24:15 Active exhaust systems

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