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      05-15-2020, 01:20 PM   #23
XutvJet
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I'm in complete support of sports cars without moonroofs. I ordered my M235 with the moonroof delete. I do question the weight though. Last week I watched a YT video of a guy remove the moonroof and assembly from his 135i and replace it with a CF insert. The entire moonroof and assembly weighed around 35lbs. The 2 series moonroof isn't any bigger than the one on the 135 and I would venture to guess it's the same system/size.

If you want the lightest US spec "stock" I6 turbo 2 series, having a 6MT without the moonroof is it. It's around 90lbs lighter than a comparably equipped RWD 8AT. It's even lighter an a 6MT no moonroof M2.
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      05-15-2020, 01:53 PM   #24
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Quote:
Originally Posted by XutvJet View Post
... 135i... The entire moonroof and assembly weighed around 35lbs.
Hmmm, interesting. That wouldn't be too good then.

I forget where I got the 80# number from -- I think one of the "lightweight M2" builds floating around. Wonder if that included removing the headliner too -- these large panels are non-trivial (the trunk side liner in my 2er was 15#).

Anyway, I'll have a more exact number for our cars soon. Still waiting on a roof to arrive from Taiwan, but might as well do prep work in advance -- remove the headliner, cassette, etc.
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      05-15-2020, 04:22 PM   #25
XutvJet
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Quote:
Originally Posted by msendit View Post
Hmmm, interesting. That wouldn't be too good then.

I forget where I got the 80# number from -- I think one of the "lightweight M2" builds floating around. Wonder if that included removing the headliner too -- these large panels are non-trivial (the trunk side liner in my 2er was 15#).

Anyway, I'll have a more exact number for our cars soon. Still waiting on a roof to arrive from Taiwan, but might as well do prep work in advance -- remove the headliner, cassette, etc.


32lbs for the 135i moonroof assembly.
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      05-20-2020, 10:14 PM   #26
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... might as well do prep work in advance -- remove the headliner, cassette, etc.
Pulled the headliner today. Together with the light panels / sunroof switch, sunvisors and the A-pillar covers, it was a whopping 10 lbs. Which is to say, not a lot.
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      05-21-2020, 02:23 PM   #27
dradernh
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Quote:
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Pulled the headliner today. Together with the light panels / sunroof switch, sunvisors and the A-pillar covers, it was a whopping 10 lbs. Which is to say, not a lot.
It all adds up; take what you can get and keep on going.

Looking forward to seeing how this turns out for you.
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      05-22-2020, 04:03 PM   #28
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IIRC, when you spec out the cost per pound for weight savings on high end racing parts, it is often more than $100/pound, so losing 10 pounds easily isn't bad. The factories have made a fetish out of finding lightweight materials, so it is getting harder to just rip out a bunch of crap and take a whole lot of weight off. Also, many of the carbon fiber trim pieces actually weigh more than their plain-jane factory counterparts.
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