Gotta question for you guys. I've made plenty of stuff out of FG, but nothing this big. Here's the deal. We've got a pre-production Eclipse we're building for Pepsi/SEMA. We're gonna ditch the rear seat and build a FG box for 4 inverted 10's. If we remove the seat, put down some plastic sheet and lay down FG for the base, how do we go about securing the next fiberglass layers for the top to the base we already made in the car? Kinda hard to explain... I've got no problem making the fiberglass bottom, then sitting up the rings and stretching fleece for the top, but will the fiberglass for the top bond to the already dried bottom ok? 4 tens and 3200 watts will creat a lot of pressure! It's been my experience that glassing to an already dried piece of FG does not create a very strong joint/bond. should I try to find a way to add a strip of MDF between where the top and bottom bond? Last thing I need is for someone to blow the top off this box in the middle of the SEMA show...
Thanks in advance for any help!
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-Just Jeff
I'm working on a Dakota right now & this is exactly what I'm doing. I molded the base out of fiberglass and wrapped it with cloth and fiberglassed the joint inside and out with another 4 layers of matting. It's solid without any air bubbles in the seam. There's no way this will break from the pressure of the subs. The toal thickness of the enclosure at the seam is about 1/2 " of fiberglass, fleece & matting.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
You will beable to do a combination of things. What I found works best is what Velocity Motors said and build up the seam to hold it together. I have never used 4 layers but one layer of 2 ounce chop mat covering a couple of inches on each side works well(on the inside of course). Another option is to mix 1 parts body filler with 2 parts polyester resin and then cream hardner. Mix the resin and filler well with a stick and add the hardner, mix in and then pour along the seam to cover any small gaps and bond them together. Don't worry about cured glass not sticking to new material, it will stick to anything without a problem. I hope this helps, and post some pictures so we can see this thing of beauty come along.