Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
11-24-2024, 01:00 PM | #1 |
Registered User
Join Date: Aug 2021
Location: Armstrong BC
Posts: 52
|
Sound Deadening and Engine Noise
Hey fellas, I have a project i've recently got on the road. Everything is great except the cab noise.
I sound deadened the hell out of the cab. Killmat on the floor/firewall with Siless foam ontop before jute carpet. It does make the cab much more quiet, but i got a serious resonance/drone around 2400rpm. Going to rebuild the exhaust to try to isolate it but i want to know if there are any tips/tricks you guys might have to quiet the cab down. Some facts about my truck are the truck was extremely rough when i got it, holes in the floors, rotted out cab corners etc. also doors don't close nice, they are abit out of alignment. The roof does not have sound deadening material. The engine is a built 370ci Turbo LS, i have a 4 inch downpipe that runs right next to the passenger firewall that has to stay. Any advice, would be much appreciated. |
11-24-2024, 10:23 PM | #2 |
Registered User
Join Date: Jun 2015
Location: Carlos MN
Posts: 2,121
|
Re: Sound Deadening and Engine Noise
And the 4" down pipe goes where? All the way to the bumper? No muffler?
|
11-24-2024, 11:41 PM | #3 |
Registered User
Join Date: Feb 2012
Location: Beautiful BC, Canada, eh?!
Posts: 2,259
|
Re: Sound Deadening and Engine Noise
Any exhaust that exits under the truck is going to drone.
These trucks are also just plain noisy. They are a tractor, with a cab. I'd love to see your truck in person though!
__________________
1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, boosted-LS 1977 Silverado: Shortboxed & dropped, potato-potato V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag Lotus Super 7 Replica: Scratch-built street-legal rollerskate |
11-25-2024, 06:54 AM | #4 |
Registered User
Join Date: Aug 2021
Location: Armstrong BC
Posts: 52
|
Re: Sound Deadening and Engine Noise
4 inch downpipe, to 4 inch to dusl 3 inch splitter. dual spintech 6000 mufflers, then through the trailing arm crossmember, turn and bend inder the frame to just below the passenger stepside step. then a 12 inch resonator on each.
|
11-25-2024, 07:45 AM | #5 | |
Registered User
Join Date: Aug 2021
Location: Armstrong BC
Posts: 52
|
Re: Sound Deadening and Engine Noise
Quote:
Its a love or hate thing i find, some dont like my solutions to problems, but i wanted a unique daily thats fast and easy to drive. got that, few minor quality of life stuff upgrades tonmake, such as power steering getting a upgrade and noise reduction in the cab. If you spot my truck anywhere come talk, i dig your youtube channel!, my truck is easy to spot due to liberal use of hole saws, sawzalls and a welder. |
|
11-25-2024, 12:02 PM | #6 |
Registered User
Join Date: Aug 2013
Location: anamosa iowa
Posts: 58,278
|
Re: Sound Deadening and Engine Noise
Killmat put on the outer door skins. The over head metal. Is the gas tank wrapped in 'mat? Or even the silver bubble wrap from MENARDS? The floor/cab upright behind/under
gas tank covered?
__________________
"Envy is a declaration of inferiority". Napoleon Bonaparte. |
11-25-2024, 04:11 PM | #7 |
Registered User
Join Date: Dec 2016
Location: Canon City, Colorado
Posts: 117
|
Re: Sound Deadening and Engine Noise
The farther you get the mufflers from under the cab. The quieter it will be inside the cab. At least that's been my experience. Kinda goes the same for where the tail pipes exit.
Last edited by Grounded63; 11-25-2024 at 04:23 PM. |
11-25-2024, 06:57 PM | #8 | |
Registered User
Join Date: Aug 2021
Location: Armstrong BC
Posts: 52
|
Re: Sound Deadening and Engine Noise
Quote:
oooh. this could be big. did not know.that, thank you. All yes,.except for the roof. |
|
11-25-2024, 09:05 PM | #9 |
Registered User
Join Date: Feb 2013
Location: central California
Posts: 2,767
|
Re: Sound Deadening and Engine Noise
I did my hood and got a 4db reduction in the cab. https://67-72chevytrucks.com/vboard/...d.php?t=808418
|
12-02-2024, 09:53 AM | #10 |
Senior Member
Join Date: Feb 2010
Location: Lambertville, MI
Posts: 1,864
|
Re: Sound Deadening and Engine Noise
AcampoDave: have any pics on how you laid it out?
|
Yesterday, 02:23 PM | #11 |
Registered User
Join Date: May 2011
Location: Anderson SC
Posts: 3,900
|
Re: Sound Deadening and Engine Noise
Resonators after the manifolds/headers to kill drone/harsh tones, and adding an X pipe will also smooth out the tone and make it less harsh in the cab. Vibrant makes really good resonators.
There are a few different "kinds" of sound to deal with in a vehicle and peel and sticky Dynomat type deadener only deals with one kind. Unfortunately the aftermarket pushes it so hard that the other ways are pretty much totally ignored. Sounddeadenershowdown used to be an excellent source of info and products to deal with the full spectrum of noise reduction, they're closed now but you can still access the info on their old site here- https://web.archive.org/web/20210609...rshowdown.com/
__________________
Project Goldilocks '66 C10 Short Fleet BBW Build '65 C10 Highly Detailed Stock Restoration Thread '78 Camaro Targa Roof Build '55 International Metal/Body/Paint Work '66 F100 Full Rotisserie Restoration '40 Packard 120 Convertible Coupe Restoration How To Restore and Detail an Original Gauge Cluster How To Detail Sand Body Panels, Edges, Corners, Etc |
Yesterday, 11:14 PM | #12 |
Registered User
Join Date: Feb 2013
Location: central California
Posts: 2,767
|
Re: Sound Deadening and Engine Noise
Rideblue: Just the ones in my link on post #9 of this thread.
|
Bookmarks |
Thread Tools | |
Display Modes | |
|
|