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TechGallery » Auto Tech » DeLorean Pics & Projects » 2014 - Spare Tire Sub

I was never completely satisfied with the lock-box sub design, so I endeavored to create a spare-tire well enclosure. The DMC spare tire is kind of worthless anyway and I have roadside coverage :)
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IMG 20140530 181553

IMG 20140530 181553

The new sub: MB Quart RLP-304. A shallow-mount sub of approx 3" depth
IMG 20140530 181553
IMG 20140601 150938

IMG 20140601 150938

Roughed-in upper MDF ring
IMG 20140601 150938
IMG 20140601 151050

IMG 20140601 151050

Critical depth check. You can do all the math on paper, but it never hurts to take a few actual measurements before getting too far in to your project!
IMG 20140601 151050
IMG 20140603 212615

IMG 20140603 212615

Lowest ring is for the sub, middle ring will be for a flush-mounted grille. The circles were done by jigsaw and turned out decently. A final carpeting will hide the remaining imperfections.
IMG 20140603 212615
IMG 20140604 165937

IMG 20140604 165937

Glued and screwed together, with caulking around layers.
IMG 20140604 165937
IMG 20140603 210413

IMG 20140603 210413

Cardboard template for terminal mounting box
IMG 20140603 210413
IMG 20140603 210733

IMG 20140603 210733

Terminal box installed. I will fiberglass around this, which will provide a relief area for the terminals and wire.
IMG 20140603 210733
IMG 20140603 211506

IMG 20140603 211506

Bowed-in section of fiberglass will allow for a "handle" relief. There is a natural depression in the trunk tub near the body mounting bolt. Keeping the upper MDF ring full size but moving the fiberglass inward here will create a handle that can be used to lift the enclosure up for removal.
IMG 20140603 211506
IMG 20140604 165147

IMG 20140604 165147

Almost finished with masking for the first fiberglass layer.
IMG 20140604 165147
IMG 20140605 174458

IMG 20140605 174458

Base layer of fiberglass down. Lots of air bubbles but the basic shape is good enough to build on.
IMG 20140605 174458
IMG 20140608 154752

IMG 20140608 154752

Form, pried out of the tire well. Time to clean up the rough patches and continue to add layers.
IMG 20140608 154752
IMG 20140611 153711

IMG 20140611 153711

The "lid" is now on the "bowl". Next step is to angle grind the bowl so it's more even / flush with the lid.
IMG 20140611 153711
IMG 20140611 164430

IMG 20140611 164430

Post grinding with fiberglass "kitty hair" fill around the outside & inside edge. Looking real ugly at this point!
IMG 20140611 164430
IMG 20140612 152344

IMG 20140612 152344

Looks like a gross giant pineapple upside-down cake to me. A second layer of kitty hair was applied and sanded down and a final fill of resin applied to fill any remaining interior & exterior voids. Next step is to smooth and paint. A few bits of tape which refused to leave have been sealed in with resin. Not planning on spending much time prettying up the bottom since it will not be visible when installed.
IMG 20140612 152344
IMG 20140613 184415

IMG 20140613 184415

Courtesy of a temperature drop, the last coat of resin was taking forever to cure. You can see where the fuel tank access panel is molded into the base and the location of the wiring terminal box.
IMG 20140613 184415
IMG 20140614 155125

IMG 20140614 155125

Base and inner rings are painted. Inside, the silver top of sound deadener. The bottom of the enclosure had some resonance - a few layers of gutter tape minimalized it.
IMG 20140614 155125
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