proTUNING Freaks
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read

Go Back   BMW M3 and BMW M4 Forum > BMW F80 M3 / F82 M4 Technical Topics > Suspension | Brakes | Chassis

Post Reply
 
Thread Tools Search this Thread
      04-03-2015, 01:26 PM   #45
Accel Junky
High on Acceleration
Accel Junky's Avatar
United_States
671
Rep
1,439
Posts

Drives: 08 M3, 90 GTR, 21 Gladiator
Join Date: Mar 2008
Location: Georgia, USA

iTrader: (6)

Quote:
Originally Posted by Cloud9blue View Post
Not trying to be a hater... But there is almost no point doing all of these works unless you are stripping down the interior and going with a lightweight racing seats (you can probably save a 100lbs just be switching the seats alone, going with a stripped down interior would probably net another 100-300lb saving, but why are doing that to a brand new $80k M3 is the question)...

Most of the weights in any modern BMW are in the sound insulation and stock seats. And unless you racing competitivelyp, it would be just a waste of money. If you want faster times, spend the money on sticker tires and better driving skills instead.
I'm just gathering as much info as I can. I find it very fascinating to try and save weight especially for no cost (and I especially like when I replace a part, also saving weight in the process...I try to keep that in mind no matter what mod I do). What I am learning on this car though is that BMW has done a very thorough job and street-minded weight reduction will probably be pretty limited. Seats, exhaust, battery are probably the main low-hanging fruits. Battery and exhaust though will make the front bias worse.
Appreciate 1
      04-03-2015, 01:51 PM   #46
dmk08
Gone Fishin’
dmk08's Avatar
United_States
7315
Rep
12,125
Posts

Drives: Walks
Join Date: Jul 2012
Location: Atlanta

iTrader: (19)

Quote:
Originally Posted by Accel Junky View Post
I'm just gathering as much info as I can. I find it very fascinating to try and save weight especially for no cost (and I especially like when I replace a part, also saving weight in the process...I try to keep that in mind no matter what mod I do). What I am learning on this car though is that BMW has done a very thorough job and street-minded weight reduction will probably be pretty limited. Seats, exhaust, battery are probably the main low-hanging fruits. Battery and exhaust though will make the front bias worse.
Plus you gotta use those scales or Mrs Accel Junky may come after ya!
Appreciate 0
      04-03-2015, 01:53 PM   #47
Accel Junky
High on Acceleration
Accel Junky's Avatar
United_States
671
Rep
1,439
Posts

Drives: 08 M3, 90 GTR, 21 Gladiator
Join Date: Mar 2008
Location: Georgia, USA

iTrader: (6)

Quote:
Originally Posted by dmk08 View Post
Plus you gotta use those scales or Mrs Accel Junky may come after ya!
You are so right and I got in such massive trouble for that purchase!
Appreciate 0
      04-04-2015, 03:52 AM   #48
robbo mcs
First Lieutenant
Australia
142
Rep
317
Posts

Drives: F82 M4 and others
Join Date: Apr 2014
Location: Sydney

iTrader: (0)

Quote:
Originally Posted by Cloud9blue View Post
Not trying to be a hater... But there is almost no point doing all of these works unless you are stripping down the interior and going with a lightweight racing seats (you can probably save a 100lbs just be switching the seats alone, going with a stripped down interior would probably net another 100-300lb saving, but why are doing that to a brand new $80k M3 is the question)...

Most of the weights in any modern BMW are in the sound insulation and stock seats. And unless you racing competitivelyp, it would be just a waste of money. If you want faster times, spend the money on sticker tires and better driving skills instead.
Maybe the OP won't be completely stripping out the car, but other people will be. It is extremely useful to have this resource here.

I race in series overseas that use production cars, you are allowed to take certain things out, others have to stay. At the same time you add in weight with a cage etc. Also, the car has to comply to a minimum weight. If you are building a car for series like this it is extremely helpful to have a list of weight of all kinds of components. It may help you decide whether the car is going to work within the regulations etc.

Previously when I have built rally cars I have documented the weight of everything that comes out of the car, down to things like sun visors, small plastic trim panels, seatbelts etc etc. It provides others with a great resource

Thanks to the OP for putting this together. It is greatly appreciated
Appreciate 1
      04-10-2015, 01:47 PM   #49
///Mobbin
Colonel
///Mobbin's Avatar
1475
Rep
2,672
Posts

Drives: m3
Join Date: Jul 2011
Location: Houston

iTrader: (3)

This thread should be made into a sticky btw.
Appreciate 0
      04-13-2015, 07:22 AM   #50
sergkoko
Comrade
sergkoko's Avatar
United_States
56
Rep
211
Posts

Drives: 15 M4 DCT
Join Date: Sep 2011
Location: Tucson, AZ

iTrader: (0)

Garage List
2015 BMW M4  [0.00]
Quote:
Originally Posted by ///Mobbin View Post
This thread should be made into a sticky btw.
+1
__________________
15 M4 / 14 M235i-Sold / 09 E92 M3-Sold / 07 E92 335i-Sold
Appreciate 0
      05-07-2015, 09:36 AM   #51
Accel Junky
High on Acceleration
Accel Junky's Avatar
United_States
671
Rep
1,439
Posts

Drives: 08 M3, 90 GTR, 21 Gladiator
Join Date: Mar 2008
Location: Georgia, USA

iTrader: (6)

I've added a couple more items.

Rogue Engineering 12mm and 15mm spacers plus their extended lug bolts. These are supposed to be some of if not THE lightest choice for our vehicles. The extended lug bolts are identical in weight to the Macht Schnell versions so they are probably the same part if I had to guess. The RE spacers are 22% lighter than the Macht Schnell variety. You can clearly see why when you look at them. There are additional large lightening holes on the spacers.
Appreciate 0
      08-25-2015, 01:06 PM   #52
Powaup
Brigadier General
Powaup's Avatar
United_States
1252
Rep
3,688
Posts

Drives: 2021 Supra 3.0 (Past: 2015 M23
Join Date: Aug 2012
Location: San Francisco, CA

iTrader: (0)

Garage List
2015 BMW M4  [10.00]
Front seats weight: http://f80.bimmerpost.com/forums/sho...5&postcount=20
__________________
Check out my YouTube Channel Powaup
Instagram: @ Powaup
Appreciate 0
      08-25-2015, 01:55 PM   #53
Accel Junky
High on Acceleration
Accel Junky's Avatar
United_States
671
Rep
1,439
Posts

Drives: 08 M3, 90 GTR, 21 Gladiator
Join Date: Mar 2008
Location: Georgia, USA

iTrader: (6)

Quote:
Originally Posted by Powaup View Post
Already got 'em.
Appreciate 1
      10-26-2015, 09:35 AM   #54
AsiaKid
Lieutenant
54
Rep
560
Posts

Drives: GTR/Gallardo Spyder/X5
Join Date: Jul 2011
Location: Hong Kong

iTrader: (0)

I know you mentioned the hood is not heavy..but i wonder how much weight savings would be to go to a full CF one..there are already some out there..i am sure some pro ones will come out when more M3/4s are produced
Appreciate 0
      12-13-2015, 01:29 PM   #55
Tom (Atl)
BMW Fan
Tom (Atl)'s Avatar
US Virgin Islands
146
Rep
315
Posts

Drives: wego
Join Date: Feb 2007
Location: Germany / US

iTrader: (1)

Great thread.

So it sounds like the best route for maximum easy weight savings is:

- CF roof
- Remove back seat
- Smaller battery

Anything else that would be easy and very noticeable?

Unfortunately I feel the car needs more weight on the rear for traction purposes.
Appreciate 0
      12-28-2015, 04:55 PM   #56
ninekrpm
Captain
ninekrpm's Avatar
533
Rep
701
Posts

Drives: F80M3 (Track) / E92M3 (Street)
Join Date: Oct 2011
Location: SoCal

iTrader: (1)

Very informative thread....
Appreciate 0
      02-28-2016, 02:22 AM   #57
M4 CSL
Captain
M4 CSL's Avatar
Australia
229
Rep
656
Posts

Drives: ///M4
Join Date: Aug 2015
Location: Australia

iTrader: (0)

Great thread. I have a few items that would be a nice reduction. Interested on how much saved.

I'm concentrating on unsprung weight first.

AP Racing Pro 5000R Radi-CAL
BBS FI-R
HRE (Ticore) Titanium wheels lugs

Need to check the weight of Ohlins TTX46 & TTX36

I already have the full titanium AKRA.

Weight savings is always and interesting way of modding, that has almost hidden payoffs.
__________________
///M4 | AKRA Evo & DP's | Brembo GT BBK | MSR CAI & CP's | MPSC2 |
Suspension : | KW CS 3-way | Dinan Toe Links | GC ARWJ & End links | IND Shims | SPL Control arms & End links | aFe Bars |
Appreciate 0
      03-09-2016, 02:43 PM   #58
Porsha
Private First Class
Porsha's Avatar
175
Rep
153
Posts

Drives: E36 M3
Join Date: May 2015
Location: Midwest

iTrader: (0)

This is my new favorite thread. Thank you for detailing all of this out.
Appreciate 0
      03-09-2016, 03:46 PM   #59
AM4ZING
Colonel
AM4ZING's Avatar
1205
Rep
2,105
Posts

Drives: M4 MW/SO 6MT, E46 M3 AW/IR 6MT
Join Date: Jan 2015
Location: Los Angeles, CA

iTrader: (0)

Garage List
2004 BMW M3  [0.00]
2015 BMW M4  [0.00]
Quote:
Originally Posted by Tom (Atl) View Post
Great thread.

So it sounds like the best route for maximum easy weight savings is:

- CF roof
- Remove back seat
- Smaller battery

Anything else that would be easy and very noticeable?

Unfortunately I feel the car needs more weight on the rear for traction purposes.
Quote:
Originally Posted by Powaup View Post

What is the weight of the rear seats?
__________________
MILA | E46 BMW M3 | AW/IR | 6MT | KW V3 | CSL | Vorsteiner |
EMILY | F82 BMW M4 | MW/SO | 6MT | M Carbon Ceramic Brakes | M Performance Exhaust |
Appreciate 0
      03-12-2016, 01:17 PM   #60
CanAutM3
General
CanAutM3's Avatar
Canada
21105
Rep
20,741
Posts

Drives: 2021 911 turbo
Join Date: Jan 2012
Location: Montreal

iTrader: (1)

Garage List
Quote:
Originally Posted by AM4ZING View Post
What is the weight of the rear seats?
IIRC, karussell weighed his M4 rear seats at ~40lb.
__________________
Porsche 911 turbo 2021 992 GT Silver

Previous cars: M4cs 2019 F82 Limerock Grey / M4 2015 F82 Silverstone / M3 2008 E92 Silverstone / M3 2002 E46 Carbon Black
Appreciate 0
      03-12-2016, 01:28 PM   #61
AM4ZING
Colonel
AM4ZING's Avatar
1205
Rep
2,105
Posts

Drives: M4 MW/SO 6MT, E46 M3 AW/IR 6MT
Join Date: Jan 2015
Location: Los Angeles, CA

iTrader: (0)

Garage List
2004 BMW M3  [0.00]
2015 BMW M4  [0.00]
Quote:
Originally Posted by CanAutM3 View Post
IIRC, karussell weighed his M4 rear seats at ~40lb.
Registered my car for 1/2 mile at Shift S3ctor so trying to figure out the benefit of removing some parts
__________________
MILA | E46 BMW M3 | AW/IR | 6MT | KW V3 | CSL | Vorsteiner |
EMILY | F82 BMW M4 | MW/SO | 6MT | M Carbon Ceramic Brakes | M Performance Exhaust |
Appreciate 0
      03-12-2016, 02:24 PM   #62
CanAutM3
General
CanAutM3's Avatar
Canada
21105
Rep
20,741
Posts

Drives: 2021 911 turbo
Join Date: Jan 2012
Location: Montreal

iTrader: (1)

Garage List
Quote:
Originally Posted by AM4ZING View Post
Registered my car for 1/2 mile at Shift S3ctor so trying to figure out the benefit of removing some parts
Every bit counts
__________________
Porsche 911 turbo 2021 992 GT Silver

Previous cars: M4cs 2019 F82 Limerock Grey / M4 2015 F82 Silverstone / M3 2008 E92 Silverstone / M3 2002 E46 Carbon Black
Appreciate 0
      03-25-2016, 10:23 AM   #63
Porsha
Private First Class
Porsha's Avatar
175
Rep
153
Posts

Drives: E36 M3
Join Date: May 2015
Location: Midwest

iTrader: (0)

Seems like there's a lot of weight to be had in the exhaust as well. Burger tuning posted a 43lb weight loss using their exhaust over factory.

http://f80.bimmerpost.com/forums/sho...&postcount=152

Last edited by Porsha; 03-25-2016 at 10:28 AM..
Appreciate 0
      03-27-2016, 08:38 AM   #64
Rx7andy
Private First Class
42
Rep
180
Posts

Drives: F80 MG
Join Date: Oct 2014
Location: Houston TX

iTrader: (1)

Does somebody have weight info for the stock under seat woofers (2?)and amp? Seems like a good opportunity to change to single woofer and move everything to the trunk to reduce weight and shift weight to the rear.
Appreciate 0
      05-20-2016, 01:18 AM   #65
shahano
Lieutenant Colonel
230
Rep
1,576
Posts

Drives: 21' M2C 6spd ,11' 1M, 88' M3
Join Date: Oct 2013
Location: London, UK

iTrader: (0)

great thread.
Appreciate 0
      06-13-2016, 01:11 PM   #66
tom @ eas
BimmerPost Supporting Vendor
tom @ eas's Avatar
United_States
8058
Rep
18,786
Posts


Drives: BMW
Join Date: Nov 2005
Location: Anaheim, CA

iTrader: (19)

Garage List
2018 BMW i3s  [0.00]
2010 BMW M3  [6.50]
2015 BMW M4  [5.25]
Following up with OEM Brake Component weights (non-CCB).

OEM Calipers
Front Caliper- 10.65lbs ea.
Rear Caliper - 8lbs ea.

OEM Rotors
Front Rotor - 24.4 lbs ea.
Rear Rotor - 20.4 lbs ea.

Quote:
Originally Posted by Rx7andy View Post
Does somebody have weight info for the stock under seat woofers (2?)and amp? Seems like a good opportunity to change to single woofer and move everything to the trunk to reduce weight and shift weight to the rear.
OEM underseat subs are 1.65lb ea.
__________________
Tom G. | european auto source (eas)
email: tom@europeanautosource.com · web: https://europeanautosource.com· tel 866.669.0705 · ca: 714.369.8524 x22

GET DAILY UPDATES ON OUR BLOG · FACEBOOK · YOUTUBE · FLICKR · INSTAGRAM
Appreciate 0
Post Reply

Bookmarks

Tags
curb, f80, reduction, weigh, weight

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 03:51 PM.




f80post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST