So Jon325i was at my house yesterday and we noticed something interesting. The floor of my trunk (318iC) has carpeting, but no insulation, while his 325i coupe has insulation (thick sheet of material painted body color) and carpeting. I'm curious if this is characteristic of cabrios or 318i models.
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most e30's with a engine lesser then the m20b25 got no tar mat in the trunk.
Too slow as is, let alone carrying around an extra 65lbs tar slab. :) Realisticily I think it has something to do with where the battery is also.Tenured Automotive Service Professional - Avid BMW Enthusiast
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Originally posted by AdamF 88iSOnly 325s have that. It's there to balance the car's weight distribution a little better. That's why M3's dont have/need it.
And FWIW (for you track junkies), I took the foam-backed OEM interior carpet which I salvaged from my previous E30 and weighed it the other day.....approx. 36lbs.
JonRides...
1991 325i - sold :(
2004 2WD Frontier King Cab
RIP #17 Jules Bianchi
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Originally posted by Ryan StewartI ditched that slab and all the other tar like insulation form the interior. It totalled to just under 80lbs. I then replaced it with just under 30lbs of dynamat extreme and its as quiet as a 7 series.
The DynaMat idea sounds pretty cool if you want to keep roadnoise down while shedding some of your cars' weight. What areas did you apply it to?
JonRides...
1991 325i - sold :(
2004 2WD Frontier King Cab
RIP #17 Jules Bianchi
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I don't think my car has that slab.. at least there's nothing in the trunk I've noticed that weighs 50+lbs. is it supposed to be under the spare? there is a little bit of something built into my floor mat, but that seems more like something to keep the mat flat over the spare cavity, and it definetly doesn't weigh 50+ lbs.
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Nando,
The slab in question surrounds the spare well and sits between the carpet and the sheet metal. If you look at Ken's pic, you'll see that his is just painted sheet metal. Jon's was painted body color but is a solid looking material.
Here's a car I found on eBay with the slab still installed.
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Its like 3/4" thick.
The rest of the stuff around the interior is not nearly as thick, its as thin as the dynamat. I peeled it out of the rear quarters and by the sill under the seat.
I applied the dynamat to the backseat, sealed the doors and rear panels, tranny tunnel, and trunk. Wanted to keep the engine noise.
Sealing the foors did the most. When I shut them it just thuds.Im now E30less.
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