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Juggular

Silencer for muffler?

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Is there a way to reduce the engine noise?  

Most people want noise. But I'm living among retirees, who do not appreciate noises.  Are there silencers for mufflers?   

 

 

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On 8/26/2021 at 9:44 PM, Juggular said:

Is there a way to reduce the engine noise?  

Most people want noise. But I'm living among retirees, who do not appreciate noises.  Are there silencers for mufflers?   

 

 

Never seen anything specific to reduce noise. The oil catcher I have fitted to my runner Bison does help in some way.

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I've read about making a muffler from tube with mesh / gauze rolled into it and fitted to the exhaust end pipe , but not sure about upsetting the flow of the exhaust gas / overheating issues

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Adding baffles or reducing the size of the exit orifice will reduce noise.  I do know that older HPI tuned pipes would unscrew in the middle where a perforated disc could be inserted to reduce noise.

The old hot-rodder trick to sign off noise citations for 1:1’s was to stuff the muffler with stainless scouring pads.

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4 hours ago, acprc said:

The oil catcher I have fitted to my runner Bison does help in some way.

That seems interesting. What does it look like?  If it's not commercially available anymore, maybe I could fashion it out of brass sheets or something?  I wonder if mesh/gauze could be fitted to absorb the sound as well?  While I'm hesitant to reduce the effectiveness of tuned pipe by fitting things inside the pipe, stainless scrubbing wool could be fitted after the stinger!  (Assuming the oil catcher is fitted to it?)

It's great when TC members help my vague idea into something more tangible. I do appreciate it.  

 

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On 8/29/2021 at 9:26 PM, Juggular said:

That seems interesting. What does it look like?  If it's not commercially available anymore, maybe I could fashion it out of brass sheets or something?  I wonder if mesh/gauze could be fitted to absorb the sound as well?  While I'm hesitant to reduce the effectiveness of tuned pipe by fitting things inside the pipe, stainless scrubbing wool could be fitted after the stinger!  (Assuming the oil catcher is fitted to it?)

It's great when TC members help my vague idea into something more tangible. I do appreciate it.  

 

Here is an ebay link to an active one

TAMIYA 41059 Oil Catcher - Tgs 'clr' Disc - RC Car Spares 638499001194 | eBay

If you dont want to click the link just search ebay for item 

eBay item number: 401630785986

Never used one myself but been interested in it for my TGS.

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I heard there was an old Kyosho buggy that routed exhaust through the gear box to reduce noise and lube the gears. 
No idea If that’s true or accurate  though.

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48 minutes ago, Dakratfink said:

I heard there was an old Kyosho buggy that routed exhaust through the gear box to reduce noise and lube the gears. 
No idea If that’s true or accurate  though.

That's correct Kyosho did. You can see the output from the exhaust on the picture below going into the gearbox in step 44 and out again in step 46

image.png.75b5881a1c0b70783d6b97fd48b36f29.png

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On 8/26/2021 at 9:44 PM, Juggular said:

Is there a way to reduce the engine noise?  

Most people want noise. But I'm living among retirees, who do not appreciate noises.  Are there silencers for mufflers?   

 

 

Actually a lot of the noise comes from the inlet induction noise that’s why 1/8th scale use an ins box to quieten it , it’s in the Brca  rules that it has to be fitted 

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42 minutes ago, Disco said:

inlet induction noise

I haven't thought of that!  After taking care of the exhaust, I should think about that too.  

 

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Like @Disco mentioned.  

It is mandatory to use INS device in racing.  Induction noise silencer.

Induction Silencer .12/.21 INS-BOX(BLACK) 103009 - WORLD CHAMPION PRODUCTS

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