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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Weight Reduction Data Compilation



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      01-21-2014, 03:06 PM   #89
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Quote:
Originally Posted by Smooth 330i View Post
Braile BB-GU1R with tender
i had a braile in my camaro...was nice and since it wasnt touched all winter i never used the tender i bought....lol

but for the 1st start of the year i always left it on for 36hrs
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      01-21-2014, 07:25 PM   #90
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Quote:
Originally Posted by Rival View Post
i had a braile in my camaro...was nice and since it wasnt touched all winter i never used the tender i bought....lol

but for the 1st start of the year i always left it on for 36hrs
The tender for Li-ion battery is apparently different and I thought it is a good idea to get it in case I need to load tune or if I go on a longer vacation.
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      01-26-2014, 12:15 AM   #91
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I have some specs to add for you guys:

OEM XI Front Springs - 3.4 lbs each
OEM BMW Style 284 Wheels - 23 lbs
OEM Continental contipro contact SSR Tires - 30 lbs

Style 284 wheels + OEM Runflats - 53 lbs


Renan CSL style Wheels:

19 x 8.5 - 24 lbs
19 x 9.5 - 25 lbs

Continental DWS:

235/35/19 - 23 lbs
265/30/19 - 25 lbs
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      07-28-2014, 04:39 PM   #92
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Thread revival

I have been looking into sunroof delete options for the e92 LCI but have not seen any threads regarding it, anyone know if this is viable?
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      09-27-2015, 04:16 AM   #93
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Bump for updates from members, I am debating removing sunroof for carbon fiber roof to cut down on weight. 2009 E90 Would like to TRY to get down to 3400-3500lbs at 650-700whp should be enough .
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      08-07-2016, 07:32 AM   #94
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When will we see the "next level" of weight reduction become common for the e9x and e8x chassis?

Have many people already started gutting them to e46, e36 levels?

How soon before its common to see these (already) track threats rolling through the paddock without AC, door cards, sound deadening, Lexan, etc?

It's still a nice, modern luxury car, but when you can pick one up for low $20k add reasonable suspension, breaks, wide tires and easily tune to big numbers, the temptation to get the weight down even further has to be real...I know it is for me.
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      08-07-2016, 06:26 PM   #95
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Quote:
Originally Posted by 1forI View Post
When will we see the "next level" of weight reduction become common for the e9x and e8x chassis?

Have many people already started gutting them to e46, e36 levels?

How soon before its common to see these (already) track threats rolling through the paddock without AC, door cards, sound deadening, Lexan, etc?

It's still a nice, modern luxury car, but when you can pick one up for low $20k add reasonable suspension, breaks, wide tires and easily tune to big numbers, the temptation to get the weight down even further has to be real...I know it is for me.
It's possible now, not too many people seriously tracking e9x cars though. Should see less than 2970# on mine shortly when scaled for corner balancing.

CF sunroof blankoff panel, gutted rear and trunk, Braille battery, half cage, race radiator, race shells, headers and straight race exhaust, CF trunk and hood, Telematics; TPMS; radio; CA; auto wipers; auto headlight; & remote deleted, etc., etc., etc.
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      08-07-2016, 07:03 PM   #96
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Quote:
Originally Posted by justpete
Quote:
Originally Posted by 1forI View Post
When will we see the "next level" of weight reduction become common for the e9x and e8x chassis?

Have many people already started gutting them to e46, e36 levels?

How soon before its common to see these (already) track threats rolling through the paddock without AC, door cards, sound deadening, Lexan, etc?

It's still a nice, modern luxury car, but when you can pick one up for low $20k add reasonable suspension, breaks, wide tires and easily tune to big numbers, the temptation to get the weight down even further has to be real...I know it is for me.
It's possible now, not too many people seriously tracking e9x cars though. Should see less than 2970# on mine shortly when scaled for corner balancing.

CF sunroof blankoff panel, gutted rear and trunk, Braille battery, half cage, race radiator, race shells, headers and straight race exhaust, CF trunk and hood, Telematics; TPMS; radio; CA; auto wipers; auto headlight; & remote deleted, etc., etc., etc.
2970 is impressive for that list. My e36 M3 is basically just front seats, steering wheel and 6pt cage at 2750 without me in it.

I involved in a project that will have some exciting new toys for the e36 and e82 guys later this year. I'm toying with the idea of getting out of the 1er into a 3 and doing just that.

Not sure what area you're in but would love to see what they feel like on that kind of diet.

Good luck with the build! Or at this point, the deconstruction.

Jason
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      08-07-2016, 07:09 PM   #97
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Quote:
Originally Posted by 1forI View Post
2970 is impressive for that list. My e36 M3 is basically just front seats, steering wheel and 6pt cage at 2750 without me in it.

I involved in a project that will have some exciting new toys for the e36 and e82 guys later this year. I'm toying with the idea of getting out of the 1er into a 3 and doing just that.

Not sure what area you're in but would love to see what they feel like on that kind of diet.

Good luck with the build! Or at this point, the deconstruction.

Jason
Yeah, 2970# is the minimum weight SCCA STU allows for a 3L engine and a single TB. Anything less and I'd have to add a ballast plate.

Here're a couple of threads on the build

http://www.e90post.com/forums/showthread.php?t=1010489
http://www.e90post.com/forums/showthread.php?t=1010510

We're expecting to come in under the min weight with the full cage (to be completed this coming winter), gutting the front of the cabin, and removing the passenger race shell, etc.

Haven't driven it yet but am expecting it to be just as track-specific as it was before since the roling chassis was modified to its current state, less latest brake incarnation, back in '14.

Good luck with your project, too, sounds like fun.

Definitely deconstruction, definitely...
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      09-10-2016, 09:23 AM   #98
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Quote:
Originally Posted by F80M View Post
I've just deleted the gf with her handbag and saved some 103 lbs sprung weight. Suggesting everyone should do the same...
I love this.

Thank god my gf weighs about 88lb, she usually does some runs for me, because I weigh 175lb
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      09-10-2016, 09:24 AM   #99
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Quote:
Originally Posted by SRanch335i View Post
lost 40 lbs off the roof
glass, mechanism, and roof liner
I am thinking about deleting my sunroof as well, please tell me if it's worth it. Loosing that top-heavy weight make any difference in handling??
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      09-10-2016, 09:32 AM   #100
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OK:

I am currently at 560whp, noticed that on track the weight is heavy on the front brakes, and the top-end weight makes it a little hard to get through the corner at certain speeds. My solution so far came to a cf hood and deleting the sunroof, trying to shed the top-end and nose weight. Any feedback for those who have done this would be great!

Also, has anyone installed the challenge cf doors?
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      04-19-2018, 02:16 PM   #101
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Quote:
Originally Posted by BrianMN View Post
This is definitely going to be one of the valuable threads to reference when more people begin tracking these cars. I found a good website linked below that has OEM BMW wheel specs and weights...but they show the 189 wheels are same as the 162 and a few other wheels at 24.75 Front, 26.30 Rear. I've added this to the first post

Brian

http://felgenkatalog.auto-treff.com/
189 wheels are 30 and 29 lbs. I weighed them myself without tires. Do not automatically trust published figures.
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      11-21-2018, 02:58 AM   #102
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--edit--- https://www.e90post.com/forums/showthread.php?t=1282179

Anyone had replaced an ordinary steel bumper brace with one from e92 M3 (carbon fiber)? Does it fit with M or standard bumpers? I am about to switch the rear one to M tech, might be a time to change the brace/support member or however you call that thing...
Attached Images
  
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Last edited by streetpro; 11-21-2018 at 03:15 AM.. Reason: I ve found the thread already :-)
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      03-11-2019, 02:17 PM   #103
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I have a stripped bare Pre-LCI e90 in the shop right now. If anyone needs any parts weighted, let me know. I have a crane scale with a 660lb capacity, probably not super accurate under 10lbs.

FWIW, my goal is 2500lb dry weight, caged.
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      03-21-2019, 10:50 PM   #104
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Car is a slick-top (no sunroof) 2006 325i with auto transmission.

Rear Subframe + Mounting Hardware (with all bushings) - 51.1 lb
Rear Control Arms (one side, with hardware) - 18.7 lb
Rear Differential (automatic transmission, with fluid) - 71.4 lb
Sound Deadening and Roof Insulation (slicktop chassis) - 21 lb
Bare Chassis with front subframe, latches, and rear glass (sound deadening removed) - *839 lb

*the car is sitting on four axle stands under the OEM jack points. I lifted one side at a time from a strap attached to the door strikers; driver side was 420 lb, passenger side was 419 lb. Not 100% sure if this method would be entirely accurate, but I can't see why not.

Last edited by Justin Daniels; 03-25-2019 at 11:25 PM..
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      03-25-2019, 11:24 PM   #105
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Front Subframe - 21 lb

Which means the almost bare chassis, in the following state, weighs 818 lb :
- Rear glass still installed
- All four doors with latches but no glass/track/mirrors.
- Other than that, absolutely everything removed that didn't require cutting
- Sound deadening removed
- No hood
- No bumpers
- No trunk
- No bumper reinforcement
- Starting to get the idea?

Last edited by Justin Daniels; 03-26-2019 at 08:27 AM..
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      01-10-2020, 11:57 AM   #106
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Anyone have any idea how much the hood and sunroof weigh on the e92? Should be around the same Id think
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      01-15-2020, 12:13 PM   #107
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Quote:
Originally Posted by thormessiah View Post
Anyone have any idea how much the hood and sunroof weigh on the e92? Should be around the same Id think
all part weights are given by BMW on realoem.com

no need to physically weigh or guess

for example: https://www.realoem.com/bmw/enUS/par...&q=34516863356
\
weight 2.8kg
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      01-31-2020, 10:29 AM   #108
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Quote:
Originally Posted by tlow98 View Post
all part weights are given by BMW on realoem.com

no need to physically weigh or guess

for example: https://www.realoem.com/bmw/enUS/par...&q=34516863356
\
weight 2.8kg
I wouldn't blindly trust RealOEM for part weights:
2383lb E93 M3 mirror

But when they are off they seem to be VERY off so I guess it could be an valid resource for weights! Sometimes it's nice to have a weight of an assembly without having to tally up all of the component weights (seats for instance).

Last edited by Justin Daniels; 01-31-2020 at 10:35 AM..
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      02-02-2020, 06:55 PM   #109
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Quote:
Originally Posted by Justin Daniels View Post
I wouldn't blindly trust RealOEM for part weights:
2383lb E93 M3 mirror

But when they are off they seem to be VERY off so I guess it could be an valid resource for weights! Sometimes it's nice to have a weight of an assembly without having to tally up all of the component weights (seats for instance).
yeah, I think they missed a few decimal places there!
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      04-22-2020, 11:23 PM   #110
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Has anyone gotten the sunroof delete offered by Nelsonracing? Looks amazing and you cut down on 33 pounds up top.
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