Weight Reduction Data Compilation

BSM n54iS · 08-24-2021, 08:37 PM

Bumping this compilation thread, lotta good data.

In case anyone hasn't seen Antigravity has a plug n' play Li battery for us and the m3 guys, drops 43lb. If you're needing a new battery anyways for 250-300 and wanted to drop weight, pretty good option. EAS recommends the 40ah and even though it's a lot less than our 90ah the 1500ca makes up for it (from what I've read) and the AG battery has a auto-restart feature, haven't been able to find a bad review or instance happening yet

https://antigravitybatteries.com/pro...tive/ag-h6-rs/

Quote:

Originally Posted by thormessiah

Has anyone gotten the sunroof delete offered by Nelsonracing? Looks amazing and you cut down on 33 pounds up top.

Not yet, I've been looking into it

Steve Sas · 08-25-2021, 06:52 AM

Whats the over voltage cut off? Some modern cars run at 15v for short time as part of maintenance cycle.

Biginboca · 08-25-2021, 02:20 PM

Quote:

Originally Posted by BdSM n54iS

Bumping this compilation thread, lotta good data.

In case anyone hasn't seen Antigravity has a plug n' play Li battery for us and the m3 guys, drops 43lb. If you're needing a new battery anyways for 250-300 and wanted to drop weight, pretty good option. EAS recommends the 40ah and even though it's a lot less than our 90ah the 1500ca makes up for it (from what I've read) and the AG battery has a auto-restart feature, haven't been able to find a bad review or instance happening yet

https://antigravitybatteries.com/pro...tive/ag-h6-rs/

Not yet, I've been looking into it

My oem battery was the 90ah and I’ve had the 30ah Antigravity for just over a year and it’s performed flawlessly. So yes the 40ah is certainly good to go, even the 30ah if you ask me.

BSM n54iS · 08-25-2021, 05:13 PM

Quote:

Originally Posted by Biginboca

My oem battery was the 90ah and I’ve had the 30ah Antigravity for just over a year and it’s performed flawlessly. So yes the 40ah is certainly good to go, even the 30ah if you ask me.

Nice! Good to see another positive review for them on our platform, how did you end up coding it?

Also EAS is a forum sponsor so I plan on purchasing from them, hopefully they have some package deals going on for us or something

Quote:

Originally Posted by Steve Sas

Whats the over voltage cut off? Some modern cars run at 15v for short time as part of maintenance cycle.

No idea, I know for charging purposes it has a management system to prevent over charging.

Biginboca · 08-25-2021, 07:37 PM

Quote:

Originally Posted by BdSM n54iS

Nice! Good to see another positive review for them on our platform, how did you end up coding it?

Per Antigravity instructions I coded for the lowest output AGM. I can’t remember offhand what all the options were but I think it was 60AH. I purchased mine direct from Antigravity and I have no regrets. The battery has some nice features besides the weight loss also, I have it set to send state of charge updates to my phone every 24 hours. It also has a built in jump start which I haven’t needed, even after sitting for a week with comfort access the battery has never shown less than 97% charged.

Steve Sas · 08-26-2021, 06:19 AM

Quote:

Originally Posted by BdSM n54iS

Nice! Good to see another positive review for them on our platform, how did you end up coding it?

Also EAS is a forum sponsor so I plan on purchasing from them, hopefully they have some package deals going on for us or something

No idea, I know for charging purposes it has a management system to prevent over charging.

You know what the battery does to protect from overcharging? It disconnects itself from the car.

BSM n54iS · 08-26-2021, 08:56 AM

Quote:

Originally Posted by Steve Sas

You know what the battery does to protect from overcharging? It disconnects itself from the car.

I put a link of the product for those to check out if they wanted... I'm not a sales rep

Steve Sas · 08-26-2021, 10:48 AM

Just letting you know as this happened to me with similar battery.
Voltage went up near 20v. I'm lucky nothing burnt out.
Just make sure they have tested these in the car you have.

autoart · 07-08-2022, 02:42 AM

I removed the plastic covers under the car. I'm talking about the ones under the passenger & drivers seat. About 2 lbs of sand, rocks, and dirt came out of each side. lol
13-year-old car 115k miles

thormessiah · 10-18-2022, 10:06 AM

I wish they had quality options for carbon fiber fenders and hoods for these cars. That's 50 pounds of the front easy

TheHazelNut · 10-27-2022, 02:18 PM

Quote:

Originally Posted by thormessiah

I wish they had quality options for carbon fiber fenders and hoods for these cars. That's 50 pounds of the front easy

Do we not have plenty of options for CF hoods also idk about m cars but non m fenders are plastics so getting CF doesn't seem like it would save a lot of weight

thormessiah · 10-28-2022, 12:36 AM

Quote:

Originally Posted by TheHaelNut

Quote:

Originally Posted by thormessiah

I wish they had quality options for carbon fiber fenders and hoods for these cars. That's 50 pounds of the front easy

Do we not have plenty of options for CF hoods also idk about m cars but non m fenders are plastics so getting CF doesn't seem like it would save a lot of weight

The seibon carbon fiber ones are pretty trash in my honest opinion. Fitment is whack and the clearcoat starts to peel quickly after a few months.

thormessiah · 11-28-2022, 08:36 PM

Carbon door cards and roofs are now an option, along with a very expensive seat delete lol

infinitenexus · 06-27-2023, 08:07 AM

Necro thread bump, I know, but I was searching weight reduction and came across this. Thought I would add a few things.

I just put some polycarbonate rear windows in my sedan.
https://www.condorspeedshop.com/prod...39683764617262

I'm also going to be installing lightweight door cards in the back. Possibly in the front as well in the future.
https://www.hardmotorsport.com/hard-...nels-full-set/

Between the plastic windows and the lightweight door panels, that saves 16 pounds.

Lots of places have carbon fiber hoods and trunks for our cars now.

Sedans still have metal front fenders. You can get fiberglass or carbon ones:
https://www.hgkshop.com/collections/bmw-e90/products/front-fenders-7
That company also sells fiberglass front and rear doors and other parts.

RealJ22 · 08-24-2023, 06:24 PM

Old thread, but just weighed the car today.

3/4 tank E92 CCC / Auto 3,430 was the weight. Have hardly “removed” anything inside.

Carbon roof swap
Front brakes (calipers lighter but disks are not)
Fog light delete
Muffler delete w/ resonators
Apex wheels 19”
Carbon hood (with a stupid amount of clear coat)

Added - spoiler, front lip, side skirt extensions

thormessiah · 06-12-2025, 08:24 AM

Swapped out the old heavy oem seats for some lightweight Braums, and this may be one of the best things I've done to the car. Lost 80 pounds center weight, now I'm going to do the same for the rear seats and purchase a delete for an additional 60 pounds off. I'm shooting for 3430 with driver

08-25-2021, 06:52 AM	#112
Steve Sas Private First Class 24 Rep 144 Posts Drives: BMW 335i 2008 Join Date: May 2020 Location: Sydney iTrader: (0)	Whats the over voltage cut off? Some modern cars run at 15v for short time as part of maintenance cycle.
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08-26-2021, 10:48 AM	#118
Steve Sas Private First Class 24 Rep 144 Posts Drives: BMW 335i 2008 Join Date: May 2020 Location: Sydney iTrader: (0)	Just letting you know as this happened to me with similar battery. Voltage went up near 20v. I'm lucky nothing burnt out. Just make sure they have tested these in the car you have.
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07-08-2022, 02:42 AM	#119
autoart Colonel 422 Rep 2,370 Posts Drives: 2009 335i e90 M/ 22 X3/2016 Ho Join Date: Oct 2010 Location: socal iTrader: (8)	I removed the plastic covers under the car. I'm talking about the ones under the passenger & drivers seat. About 2 lbs of sand, rocks, and dirt came out of each side. lol 13-year-old car 115k miles
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10-18-2022, 10:06 AM	#120
thormessiah Lieutenant 225 Rep 454 Posts Drives: 2008 BMW 335i Coupe Join Date: Oct 2017 Location: Texas iTrader: (0) Garage List 2008 BMW 335i [0.00] [0.00]	I wish they had quality options for carbon fiber fenders and hoods for these cars. That's 50 pounds of the front easy
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11-28-2022, 08:36 PM	#123
thormessiah Lieutenant 225 Rep 454 Posts Drives: 2008 BMW 335i Coupe Join Date: Oct 2017 Location: Texas iTrader: (0) Garage List 2008 BMW 335i [0.00] [0.00]	Carbon door cards and roofs are now an option, along with a very expensive seat delete lol
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06-27-2023, 08:07 AM	#124
infinitenexus Enlisted Member 18 Rep 41 Posts Drives: BMW 328xi Join Date: Jun 2022 Location: Cleveland iTrader: (0)	Necro thread bump, I know, but I was searching weight reduction and came across this. Thought I would add a few things. I just put some polycarbonate rear windows in my sedan. https://www.condorspeedshop.com/prod...39683764617262 I'm also going to be installing lightweight door cards in the back. Possibly in the front as well in the future. https://www.hardmotorsport.com/hard-...nels-full-set/ Between the plastic windows and the lightweight door panels, that saves 16 pounds. Lots of places have carbon fiber hoods and trunks for our cars now. Sedans still have metal front fenders. You can get fiberglass or carbon ones: https://www.hgkshop.com/collections/bmw-e90/products/front-fenders-7 That company also sells fiberglass front and rear doors and other parts. __________________ 2008 328xi 3 stage intake manifold, euro airbox, godspeed coilovers, racing buckets, BBS RC-090s with 255/40R17s, catback, headers, interior gutted, lexan rear windows, next mods: MILVs and a tune.
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08-24-2023, 06:24 PM	#125
RealJ22 Captain 1444 Rep 964 Posts Drives: E92/E90LCI Join Date: Mar 2019 Location: WI / AZ iTrader: (0) Garage List 2011 328i Sedan [0.00] 2007 BMW 335i [0.00]	Old thread, but just weighed the car today. 3/4 tank E92 CCC / Auto 3,430 was the weight. Have hardly “removed” anything inside. Carbon roof swap Front brakes (calipers lighter but disks are not) Fog light delete Muffler delete w/ resonators Apex wheels 19” Carbon hood (with a stupid amount of clear coat) Added - spoiler, front lip, side skirt extensions __________________ Long Beach Blue E92 with Carbon Fiber Roof Build Thread 2010 W212 E350 4Matic - 2007 E92 335I Long Beach Blue OEM E92 M3 Carbon Roof Swap - 2011 328I LCI Sedan Slick Top - 2008 Cayman S - 1998 Boxster Spec Race Car
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06-12-2025, 08:24 AM	#126
thormessiah Lieutenant 225 Rep 454 Posts Drives: 2008 BMW 335i Coupe Join Date: Oct 2017 Location: Texas iTrader: (0) Garage List 2008 BMW 335i [0.00] [0.00]	Swapped out the old heavy oem seats for some lightweight Braums, and this may be one of the best things I've done to the car. Lost 80 pounds center weight, now I'm going to do the same for the rear seats and purchase a delete for an additional 60 pounds off. I'm shooting for 3430 with driver Attached Images
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