Go Back  RCU Forums > RC Cars, Buggies, Trucks, Tanks and more > RC Car Engines > Car Nitro & Gas Engines
Reload this Page >

Any way to quiet the exhaust on a nitro engine?

Notices
Car Nitro & Gas Engines Discuss all aspects of Nitro and Gas rc car engines here!

Any way to quiet the exhaust on a nitro engine?

Old 05-31-2010, 12:54 PM
  #1  
zachattack2795
Member
Thread Starter
 
Join Date: Apr 2010
Location: Detroit, MI
Posts: 42
Likes: 0
Received 0 Likes on 0 Posts
Default Any way to quiet the exhaust on a nitro engine?

My duratrax st wit hthe velocity .17 is excessively loud. i put a piece of tubing on the exhaust to quiet it and it worked quite well. Just wondering if theres another way. I can live with some performance loss.
Old 05-31-2010, 01:59 PM
  #2  
PrjctStrtFrce
Senior Member
My Feedback: (10)
 
PrjctStrtFrce's Avatar
 
Join Date: Aug 2005
Location: Bartlett, IL
Posts: 2,948
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?

Not to sound like a smart azz, but you may as well convert to electric/brushless. I had a Velocity 15 and that thing was nearly silent compared to the big block motors I have now.

Just a thought.
Old 05-31-2010, 02:13 PM
  #3  
proanti1
Senior Member
My Feedback: (2)
 
proanti1's Avatar
 
Join Date: Dec 2004
Location: Boerne, TX
Posts: 4,299
Likes: 0
Received 1 Like on 1 Post
Default RE: Any way to quiet the exhaust on a nitro engine?

I quieted down an HPI by shoving some brillow pad down into the muffler, made it almost silent. Not too much performance loss either because the pipe was already pretty far from being tuned. It was that really course copper brillow stuff.
Old 05-31-2010, 05:58 PM
  #4  
zachattack2795
Member
Thread Starter
 
Join Date: Apr 2010
Location: Detroit, MI
Posts: 42
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?

I'll try the brillow. I put some tubing on the end that quieted it a bit. I already have an electric truck. I like being able to choose what i want to drive.
Old 05-31-2010, 06:09 PM
  #5  
dug44
Senior Member
My Feedback: (2)
 
Join Date: Apr 2010
Location: Barkhamsted, CT
Posts: 790
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?


ORIGINAL: zachattack2795

My duratrax st wit hthe velocity .17 is excessively loud. i put a piece of tubing on the exhaust to quiet it and it worked quite well. Just wondering if theres another way. I can live with some performance loss.
There sure is... Don't use brillo. The soap on it will oxidize your exhaust... Instead use a course steel wool. Take ( a small bouncy ball size)and turn it in your fingers to form a bullet like shape, and start feeding that bad boy in... It will quiet that bad oscar right down...

Old 05-31-2010, 06:54 PM
  #6  
zachattack2795
Member
Thread Starter
 
Join Date: Apr 2010
Location: Detroit, MI
Posts: 42
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?

thanks elaborating. ill pick up some steel wool tommorow
Old 05-31-2010, 07:12 PM
  #7  
dug44
Senior Member
My Feedback: (2)
 
Join Date: Apr 2010
Location: Barkhamsted, CT
Posts: 790
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?


ORIGINAL: zachattack2795

thanks elaborating. ill pick up some steel wool tommorow
You bet.

Old 06-01-2010, 05:25 PM
  #8  
zachattack2795
Member
Thread Starter
 
Join Date: Apr 2010
Location: Detroit, MI
Posts: 42
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?

I just took apart my two piece pipe and removed the baffle and stuffed the whole thing loosely with steel wool. I can tell if its slowed down or if its just from the sound but its significantly quieter and definately worth it for me. I also have my aluminum pipe for when i need to kick some *****
Old 06-01-2010, 07:23 PM
  #9  
dug44
Senior Member
My Feedback: (2)
 
Join Date: Apr 2010
Location: Barkhamsted, CT
Posts: 790
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?

Took it apart? how you mean?
Old 06-01-2010, 07:41 PM
  #10  
proanti1
Senior Member
My Feedback: (2)
 
proanti1's Avatar
 
Join Date: Dec 2004
Location: Boerne, TX
Posts: 4,299
Likes: 0
Received 1 Like on 1 Post
Default RE: Any way to quiet the exhaust on a nitro engine?

ORIGINAL: dug44


ORIGINAL: zachattack2795

My duratrax st wit hthe velocity .17 is excessively loud. i put a piece of tubing on the exhaust to quiet it and it worked quite well. Just wondering if theres another way. I can live with some performance loss.
There sure is... Don't use brillo. The soap on it will oxidize your exhaust... Instead use a course steel wool. Take ( a small bouncy ball size)and turn it in your fingers to form a bullet like shape, and start feeding that bad boy in... It will quiet that bad oscar right down...

I wasnt talking about the stuff with the soap, its comes in packs of 3... at least at my store, its like steel wool but copper. I wouldn't use steel wool, it would rust within days, then make a mess out of the inside of your pipe. Nitro oxidizes steel faster than hell, especially a soft steel like steel wool.
Old 06-01-2010, 08:01 PM
  #11  
zachattack2795
Member
Thread Starter
 
Join Date: Apr 2010
Location: Detroit, MI
Posts: 42
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?

i got the 3 pack of steel wool(stainless if it makes a difference) http://www.rc-hobbies.co.uk/images/PROTunedMuffler.JPG theres a picture of the muffler i used from a friends cheap japanese car. Will stainless steel still rust?
Old 06-01-2010, 08:16 PM
  #12  
proanti1
Senior Member
My Feedback: (2)
 
proanti1's Avatar
 
Join Date: Dec 2004
Location: Boerne, TX
Posts: 4,299
Likes: 0
Received 1 Like on 1 Post
Default RE: Any way to quiet the exhaust on a nitro engine?

Nope, stainless wont rust.
Old 06-01-2010, 08:51 PM
  #13  
zachattack2795
Member
Thread Starter
 
Join Date: Apr 2010
Location: Detroit, MI
Posts: 42
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?

thanks for the peace of mind. i almost bought copper but i wasnt sure of it
Old 06-01-2010, 08:59 PM
  #14  
dug44
Senior Member
My Feedback: (2)
 
Join Date: Apr 2010
Location: Barkhamsted, CT
Posts: 790
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?


ORIGINAL: proanti1

ORIGINAL: dug44


ORIGINAL: zachattack2795

My duratrax st wit hthe velocity .17 is excessively loud. i put a piece of tubing on the exhaust to quiet it and it worked quite well. Just wondering if theres another way. I can live with some performance loss.
There sure is... Don't use brillo. The soap on it will oxidize your exhaust... Instead use a course steel wool. Take ( a small bouncy ball size)and turn it in your fingers to form a bullet like shape, and start feeding that bad boy in... It will quiet that bad oscar right down...

I wasnt talking about the stuff with the soap, its comes in packs of 3... at least at my store, its like steel wool but copper. I wouldn't use steel wool, it would rust within days, then make a mess out of the inside of your pipe. Nitro oxidizes steel faster than hell, especially a soft steel like steel wool.
oh my bad man, wasnt doubting you. just wanted to make sure he didnt throw the ol' brillo from under the sink in there....

Old 06-19-2010, 12:15 PM
  #15  
TTMT
 
Join Date: Oct 2006
Location: Anaheim, CA
Posts: 347
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?

So glad to find this thread. I drive an XTM truggy and an MGT 8.0. Both are very noisy, particularly the MGT. What about stuffing the exhaust pipe with fiberglass? That's what they use in certain full scale mufflers (e.g., Cherry Bomb glass packs). Is the power loss drastic or just slight? Seems like fiberglass would be safest because it wouldn't rust and wouldn't react with the aluminum pipe. Doesn't the galvanic reactionbetween steel andaluminum and copper and aluminum posea problem long-term?
Old 06-22-2010, 03:44 PM
  #16  
proanti1
Senior Member
My Feedback: (2)
 
proanti1's Avatar
 
Join Date: Dec 2004
Location: Boerne, TX
Posts: 4,299
Likes: 0
Received 1 Like on 1 Post
Default RE: Any way to quiet the exhaust on a nitro engine?


ORIGINAL: TTMT

So glad to find this thread. I drive an XTM truggy and an MGT 8.0. Both are very noisy, particularly the MGT. What about stuffing the exhaust pipe with fiberglass? That's what they use in certain full scale mufflers (e.g., Cherry Bomb glass packs). Is the power loss drastic or just slight? Seems like fiberglass would be safest because it wouldn't rust and wouldn't react with the aluminum pipe. Doesn't the galvanic reaction between steel and aluminum and copper and aluminum pose a problem long-term?
RC car mufflers are designed quite differently than car mufflers. Dry gasses pass through a car muffler, so there is nothing to soak into the fiberglass. An rc car engine passes oil through the exhaust, enough oil to soak into fiberglass and make a mess.
Old 06-22-2010, 07:20 PM
  #17  
TTMT
 
Join Date: Oct 2006
Location: Anaheim, CA
Posts: 347
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?

Makes sense. What about the galvanic reaction between the metals? Is it an issue? Do you need to replace the steel wool after awhile due to oily gunk build-up?
Old 06-23-2010, 12:10 PM
  #18  
proanti1
Senior Member
My Feedback: (2)
 
proanti1's Avatar
 
Join Date: Dec 2004
Location: Boerne, TX
Posts: 4,299
Likes: 0
Received 1 Like on 1 Post
Default RE: Any way to quiet the exhaust on a nitro engine?

The mufflers I packed have been either hard anodized or plastic... so I have not had any issue with any sort of reaction. I have never really had the stuff in the muffler for longer than about a week at a time... so it never gummed up. I imagine it would get pretty gross after a few months though. The aluminum is so thick that any reactions would be too small to do the pipe damage.
Old 06-23-2010, 01:00 PM
  #19  
TTMT
 
Join Date: Oct 2006
Location: Anaheim, CA
Posts: 347
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?

Well, if it's really effective and not hard to do, I'd like to try it.  How do you go about putting it into and removing it from the pipe?
Old 06-24-2010, 09:01 AM
  #20  
proanti1
Senior Member
My Feedback: (2)
 
proanti1's Avatar
 
Join Date: Dec 2004
Location: Boerne, TX
Posts: 4,299
Likes: 0
Received 1 Like on 1 Post
Default RE: Any way to quiet the exhaust on a nitro engine?

I just shoved it in there with a screwdriver, and used a pair of needle nose pliers to pull it out.
Old 06-24-2010, 10:15 PM
  #21  
TTMT
 
Join Date: Oct 2006
Location: Anaheim, CA
Posts: 347
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Any way to quiet the exhaust on a nitro engine?

Okay, I may try it out at some point.  Thanks.
Old 04-18-2020, 06:45 PM
  #22  
fyrstormer
 
Join Date: Jul 2015
Posts: 5
Likes: 0
Received 2 Likes on 2 Posts
Default

I'm probably the only person who still cares about this topic, but I settled on bronze wool from an art-supply store instead of any type of steel wool, because bronze wool won't corrode the way steel wool does. (yes, even stainless steel wool will corrode from the nitric acid fumes in nitro exhaust.) There is a performance reduction, but if it's a choice between reduced performance vs. not being able to run your nitros because of noise complaints, then reduced performance is obviously the better choice.
Old 08-15-2020, 09:47 AM
  #23  
Iflymostlyelectric
Junior Member
 
Join Date: Aug 2020
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

Honestly, I don't particularly know. As far as I can tell, no. I have a OS LA .46 nitro engine on an RC airplane, and it sounds pretty quiet compared to others, but the only way I think you can qiuet it down is with a tuned muffler.
Old 08-15-2020, 01:49 PM
  #24  
1QwkSport2.5r
 
1QwkSport2.5r's Avatar
 
Join Date: Oct 2006
Location: Cottage Grove, MN
Posts: 9,946
Received 17 Likes on 17 Posts
Default

Tuned mufflers are often louder than basic mufflers are. Car engines are hard to quiet down because of their robust timing and often higher nitro content fuels. The nitro makes the exhaust note significantly sharper.

Basic sport airplane engines such as the OS LA and FP series are very low timed engines - anyone on the planet can operate them, and they’re not suitable to compare against a truck engine as mentioned in the beginning of my post.

Granted, this is an old thread that has been discussed at great length in the past, but blocking the pipe with foreign material is asking for trouble. Not only in respect to the pressure wave resonance (tuning) of the pipe, but also the fact that small fragments can dislodge and get pushed into the engine. There are ways of quieting an engines noise down, but it often comes with adverse consequences.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.