Trunk rattle

[spokey9 5,000+ posts]

So I'm about to start buying materials for deadening my delta. My biggest concern is trunk rattle. I'm gonna do 200ml on the big panels and the entire trunk. What else can I do to dampen the trunk lid? I'll be running 2 sql-15's ib on 2k so I'm pretty sure there's gonna be some rattling when the go low

Click to read more...

 

[audiobaun 5,000+ posts]

Id place the entire lower and sides with this before laying a false floor or covering with abs or any other covering that may be needed. water and moisture proof, mildew resistant, sound barrier,insulation, and fire resistant. can be cut to fit and cram into crevices needed to fill with a broom stick or the like. ill use a 1x2 rounded off so it doest rip the portion apart when shoving it in place, though its pretty rugged compared to reg insulation from coming apart. good Stuff! Just a recommendation man. shop around and find better pricing, especially while the 4th sales are going on

https://www.lowes.com/pd/Owens-Corn...VznDn_tnK0FrEeRcDKxoCrtgQAvD_BwE&gclsrc=aw.ds

 

[audiobaun 5,000+ posts]

Use a fillet knife to cut in half even. use a dust mask and some goggles and leather type gloves and long sleeve shirt and pants to keep the glass particles off of you. Cheap and dammned good stuff

 

[audiobaun 5,000+ posts]

https://www.lowes.com/pd/Johns-Manville-TempControl-R-15-Mineral-Wool-Batt-Insulation-with-Sound-Barrier-15-25-in-W-x-47-in-L/1000441585?cm_mmc=shp-_-b-_-prd-_-pro-_-ggl-_-LIA_BDM_000_PRO-_-1000441585-_-local-_-0-_-0&gad_source=1&gclid=CjwKCAjwyo60BhBiEiwAHmVLJUP4hk981A2MC-9X4eHYNQAN6hMspnHi71m82haCFuEJwGZWX6Z4nxoCJZ0QAvD_BwE&gclsrc=aw.ds

you can use cheap duct tape of whatever color you want or some good packing clear tape to seal up the cracks with but wedge them in place to stay better. You can also use Foam board 1/2" to silicone or glue or screw with flat oversized washers to hold in place too. looks good, and does very well

 

[audiobaun 5,000+ posts]

1/2 in. x 48 in. x 8 ft. R-1.93 EPS Rigid Foam Board Insulation

Robot or human?

Whatever lenght self tapping screws you need due to thickness and 1/8" depth ti secure to lid of trunk. You might even look at some Foamboard washers9may be a little more expensive, but have teeth to go into the foam and you can screw those down?) like these here. i know you dont need that many. LOL

https://www.amazon.com/dp/B0CCKCPS8D/?tag=caraudiocom-20

 

[audiobaun 5,000+ posts]

Just some recommendations. whatever is left over you can do your floor bards or?even use in and around the Casa if needed?

 

[spokey9 5,000+ posts]

I'm plan on going all out on the trunk itself. The lid is where I'm most concerned

I've got a bunch cut up denim I've soaked in scotch guard for batting in the hide holes.

I know I'm gonna do gas struts for the trunk lid and pull the torsion bar. That'll help some I think

 

[1aespinoza 10+ year member]

. My biggest concern is trunk rattle.

Shoot, to get the best trunk rattle you could fill the cavities with BBs. If you want to go hardcore, you could even drill out some of those spot welds.

 

[maylar 10+ year member]

Damping material will make that trunk lid heavy. You might try selective damping after you get the install done. I never considered gas struts for mine, and yes the trunk buzzed with just a pair of free-air 8's in the rear deck. Also pay attention to the license plate mounting...

 

[spokey9 5,000+ posts]

Damping material will make that trunk lid heavy. You might try selective damping after you get the install done. I never considered gas struts for mine, and yes the trunk buzzed with just a pair of free-air 8's in the rear deck. Also pay attention to the license plate mounting...

View attachment 58965

Oh I want that trunk lid heavy af

The flip down license plate is a wash...but on my old delta I never really heard it inside the car anyways and I just glued chunks of pipe insulation on the back of the plate.

 

[audiobaun 5,000+ posts]

Oh I want that trunk lid heavy af

The flip down license plate is a wash...but on my old delta I never really heard it inside the car anyways and I just glued chunks of pipe insulation on the back of the plate.

Place some 200lb actuators for the trunk supports

https://www.amazon.com/dp/B09X9XHQPQ/?tag=caraudiocom-20

 

[spokey9 5,000+ posts]

Place some 200lb actuators for the trunk supports

https://www.amazon.com/dp/B09X9XHQPQ/?tag=caraudiocom-20

I'm looking at 160lb gas struts

 

[1aespinoza 10+ year member]

I'm looking at 160lb gas struts

Question. When a trunk rattles, is it the actual lid that makes all the raucous rattling or the links that connect it to the body?

 

[maylar 10+ year member]

Question. When a trunk rattles, is it the actual lid that makes all the raucous rattling or the links that connect it to the body?

On the cars that I have worked on, the trunk lid has had rubber bumpers and weather-stripping to isolate it from the body when closed. Hinges vary in design and if they're reinforced ("laminated") sometimes the metal assembly can rattle. The areas where I've seen issues are the cross rib reinforcing that is spot welded to the lid underneath. This has become less of an issue with the advent of fiberglass body panels.

My experience however does not include kilowatt systems that can make the entire trunk lid, and even the fenders, vibrate.

 

[spokey9 5,000+ posts]

Question. When a trunk rattles, is it the actual lid that makes all the raucous rattling or the links that connect it to the body?

I don't know about all trunks but I pretty sure a majority of the rattle came from the lid itself on my old delta. You could watch it straining against the latch and if some sat on the edge of the trunk with their feet on the bumper the most obnoxious rattling disappeared.

Maybe I just need to hire a fat guy to ride around on my trunk