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Old 04-02-2016, 07:56 PM   #1
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Noise Reduction - while driving - Wind and Engine

I've read a bunch about Dynamat and other noise dampeners/insulators for a front-engine 2003 International and I'm going to pull the trigger on this suff for the interior:
Amazon.com: Noico Liner 37.5 Sqft Heat & Cool Automotive Insulation Pad, Foam Self-adhesive Sound Deadening and Dampening Mat for Cars & Trucks (1/6'' or 157 Mil Sound Deadener): Automotive
And this for the engine compartment:
Robot Check
and this for the floor and internal firewall.
Robot Check

QUESTION:

A fair amount of the noise is likely coming from wind.

The driver side window is definitely a culprit. Does anyone know where I can find a wind defector for that window?
^ same question for the entry door.

I was thinking of hacking something like this:
Robot Check

If not, anyone fabricate one successfully? I made air intakes for the generators by successful forming lexan, but wind deflectors are a little more complicated to get right I understand.

I've written to a number of school bus accessory shops without success...

Any other tips to reducing noise would be awesome!
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Old 04-02-2016, 08:08 PM   #2
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like this thing Frost King Heat & Air Deflector 10 To 14 in. HD5
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Old 04-02-2016, 08:17 PM   #3
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Quote:
Originally Posted by Kylebetaclark View Post
I've read a bunch about Dynamat and other noise dampeners/insulators for a front-engine 2003 International and I'm going to pull the trigger on this suff for the interior:
Amazon.com: Noico Liner 37.5 Sqft Heat & Cool Automotive Insulation Pad, Foam Self-adhesive Sound Deadening and Dampening Mat for Cars & Trucks (1/6'' or 157 Mil Sound Deadener): Automotive
And this for the engine compartment:
Robot Check
and this for the floor and internal firewall.
Robot Check

QUESTION:

A fair amount of the noise is likely coming from wind.

The driver side window is definitely a culprit. Does anyone know where I can find a wind defector for that window?
^ same question for the entry door.

I was thinking of hacking something like this:
Robot Check

If not, anyone fabricate one successfully? I made air intakes for the generators by successful forming lexan, but wind deflectors are a little more complicated to get right I understand.

I've written to a number of school bus accessory shops without success...

Any other tips to reducing noise would be awesome!
I have a very similar setup to yours and plan on building a plywood, insulated box to go over my doghouse and double as a table top. SHould cut down the noise quite considerably.
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Old 04-02-2016, 08:29 PM   #4
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Quote:
Originally Posted by EastCoastCB View Post
I have a very similar setup to yours and plan on building a plywood, insulated box to go over my doghouse and double as a table top. SHould cut down the noise quite considerably.
will that add heat to the engine?
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Old 04-02-2016, 08:39 PM   #5
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i've been considering the sound mat over my engine cover. dang its loud in there.

post pics and your results!
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Old 04-02-2016, 08:55 PM   #6
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Used peal and seal inside the doghouse. Adjusted the entry door so it's tighter.

All helps.
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Old 04-02-2016, 09:00 PM   #7
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yeah, thats a good idea, but I put in a co-pilot seat (got her for free and reupholstered) and there is barely enough legroom for her anymore...)



there is this pathetic insulation/soundproof on the interior of the engine firewall... its like 1/8" paneling. I might rip that out and put adhesive backed high density foam.

I just took out the doghouse and there is about 1/2" of foil backed foam on the engine side. I'll see how flexible the insulation is and if I can put an interior layer or augment the engine side layer on it.
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Old 04-02-2016, 09:01 PM   #8
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hrmmmm... I haven't looked at the adjustment of the door.

Thanks for the tip!
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Old 04-02-2016, 09:04 PM   #9
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Quote:
Originally Posted by Azuleslight View Post
will that add heat to the engine?
nope. Will cut down on noise and heat in the cab though.

You could move her seat to the back of the bus, that would cut down on noise! lol
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Old 04-02-2016, 09:15 PM   #10
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precisely the insight I was seeking! Multiple reasons to move the seat!
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Old 04-02-2016, 09:16 PM   #11
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I like it... thank you!
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Old 04-02-2016, 09:23 PM   #12
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You could fashion a seat that can be put over the stairs, buying you some real estate and a bit of elbow room.
The Goat bus kids had a REDICULOUSLY awesome folding passenger seat that was a marvel to behold. Check out their thread if you wanna see the ultimate in passenger accommodations!
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Old 04-02-2016, 09:41 PM   #13
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I used a product called Nittodamp. Peel and stick rubber and foil. It makes a huge difference in noise.
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Old 04-02-2016, 10:42 PM   #14
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Where did you find it, Alan?
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Old 04-02-2016, 10:50 PM   #15
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Where did you find it, Alan?
Auto Value.
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Old 04-03-2016, 09:12 AM   #16
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my stair well cover made a big difference in noise,
gbstewart
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Old 04-11-2016, 07:22 PM   #17
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today i tried a home depot product "Useal - Instant waterproof repair tape" to try and dampen the motor cover noise. i added the tape over the insulation on the bottom of the dog house cover and got a minor improvement in the cab noise.

i was able to measure the decibel sound level from an app on the phone.

before any added tape, the sound level at idle was 83-84db.

after the tape, it measured 80-81db.

i don't think i would have noticed a difference, but every little bit helps.

something the tape is really good at is fixing rattles!! little pieces of tape on the dash board metal sure quieted it down.

i wish i had used some of this during construction.
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Old 04-19-2016, 02:05 PM   #18
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Engine: DT 466 Diesel
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I am also going to build an insulated box to help keep the engine noise down. I'm not sure what to use for insulation yet but i will seal the seams of the box with caulking. The bonus is that there will now be a flat surface to add cup holders.
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Old 04-19-2016, 03:11 PM   #19
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Did you notice the box built over the engine in the RVs? Yeah, why would they make these things without cup holders?
I'm not personally bothered by the noise of the engine in my FE bus. I like to hear what the engine is doing. Listen to the turbo spooling up and stuff. I am, however, very disappointed that there are no cup holders built in. I planned on also building a box that incorporates cup holders and additional cubby pockets similarly to the S&S folks.
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Old 04-19-2016, 03:15 PM   #20
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I too have that Noico dampening mat saved on my amazon wish list, figured when I got to that part of my project I'd order enough to wrap the bedroom walls and roof as well as the driver's area to be able to hear my radio better!!
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