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      08-27-2020, 07:32 PM   #31
msendit
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Drives: M240i
Join Date: May 2018
Location: San Francisco, CA

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To circle back on my little "plug the sunroof" project, which went out of control. The weight we ended up with eventually is 3574 lbs, full tank and 150-lb driver. That will be ~3324 empty, no driver.

Unfortunately, too many changes since the last time I put the car on scales to get accurate numbers for everything. That time was 3714, but since then I've added much bigger wheels and tires, bigger brakes, fender flares, so maybe a total of 60-70 lbs.

So, roughly speaking, 200 lbs saved from:
- interior plastic: rear panel covers, A/B/C pillar covers, trunk liner, all seatbelts (~40)
- front wheel well bracing (~30)
- rear bulkhead, curtain airbags (??)
- headliner, comfort lights, SOS switch, etc (~10)
- sunroof cassette, replace metal roof with CF (??)
- passenger seat (~15), my sim rig borrowed it at the start of covid
- different rollbar (probably about the same?)
- different shocks & springs (also same?)

So, depending on what the error bars on all the unknowns are, probably between 50-80 lbs for the sunroof + CF.

I'll stop for now and just trash the car around the track for a while. If I get back to cutting weight, there's another 100 or so "easy" pounds in AC, speakers, lightweight battery.

Last edited by msendit; 08-27-2020 at 08:49 PM..
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