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Originally Posted by Def
Is the rear hatch all that heavy? I currently have my wing mounted on there, and I even used about 1-1.5 lbs of aluminum stock to really strength the deck lid(it was flexing quite a bit. A FRP hatch would probably not stand up to the wing without SIGNIFICANT strengthening, and at that point, probably not too much lighter than stock. I can see a few lbs there, but I'd rather not be dropping hundreds of bucks for a few lbs at this point(I'd get an aluminum driveshaft if that was the case).
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A stock hatch, w/glass, w/o a wing, and w/o a wiper weighs in at
53.6 lbs according to the shipping scale across the street. I left it over there right now after weighing it because it was too damn heavy to carry back across the street by myself again. With a fiberglass hatch/lexan window you could probably cut that weight almost in half. Now on a coupe it's a different story. Coupe trunks are not very heavy...
Stiffening up the hatch with some foam or honeycomb for your wing should only add a couple pounds. You'll probably still end up dropping 20lbs off the hatch/glass even if you go nuts re-enforcing it...
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Not going to spend the money on CF/FPR doors either - at that point I'll just gut the stock doors(which I'm going to do slightly, not sure how much weight there is to be lost and keep at least some side protection).
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There isn't really anything to remove from the doors unless you just want to completely hollow them out. I spent an hour staring at mine with the panels off trying to figure out where I could trim it off without hurting the door too much structurally. It's not worth it... Doors are heavy as hell though, probably about 60lbs each maybe even a little more. But the "fiberglass doors" thing goes back to the "trailered track car" thing. Not too realistic on a "street" car.