Relocating battery to trunk - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Ess Vee · 06-12-2012, 07:54 PM

Supposedly the FR-S has a 53%-to-the-front/47%-to-the-rear weight distribution.

Anyone work on a battery relocation to the rear to neutralize the weight distribution for better handling?

Also, any other ideas are welcome.

Thanks,
Nathan

SUB-FT86 · 06-12-2012, 08:14 PM

It actually has a 55/45 distribution with 0 people in it and if you trying to get to 50/50, good luck.

mattles · 06-12-2012, 08:45 PM

I thought about it, just because my previous car was a miata and had a battery in the trunk stock. I think Im going to take the easy route and just get a very small/lightweight AGM battery to place in the front of this car. Maybe turn it over on its side to get the weight positioned as low in the vehicle as possible.

Miniata · 06-12-2012, 08:54 PM

I'd much rather go with a smaller lighter battery up front near the stock location and take 20-25 lbs off the front end, than add the extra weight of a battery box and long cables to run a battery to the trunk, not to mention the loss of trunk space.

blu_ · 06-12-2012, 08:59 PM

I think perfectly 50/50 weight distribution is pretty overrated, especially on a car when people seem to be on the throttle flat through most corners. I would also just consider getting a lighter battery if you want to reduce overall weight.

Cheddar · 06-12-2012, 09:29 PM

Quote:

Originally Posted by Miniata

I'd much rather go with a smaller lighter battery up front near the stock location and take 20-25 lbs off the front end, than add the extra weight of a battery box and long cables to run a battery to the trunk, not to mention the loss of trunk space.

I was thinking about a smaller odyssey battery.

serialk11r · 06-12-2012, 10:42 PM

There were some arguments about this a few months ago...
Moving the stock battery to the back will shift the weight distribution 1%, that is +1 -1 so 54/46ish, putting a lighter one in the back shifts it less, putting a lighter one in the front will shift it only a little, etc.

Unleashed · 06-13-2012, 06:37 PM

Seems kind of pointless to me if it only changes the ratio -1/+1. If you want to even out the weight throw a sandbag in the back hahaha jk

FoolCyclist · 06-13-2012, 06:49 PM

Why not just go all Good Fellas and throw a 200 pound mobster in the trunk to even things out a bit.

spomi · 10-02-2012, 01:59 AM

Quote:

Originally Posted by Ess Vee

Supposedly the FR-S has a 53%-to-the-front/47%-to-the-rear weight distribution.

I have read somewhere that most FR cars has similar distribution. This changes when the car is moving and the center of mass shifts backward. At that point the car actually closer to 50/50.

BAE · 10-02-2012, 07:59 AM

I wouldn't bother moving it either. It is easier to change the balance of the car in corners with camber angles and tire pressure. A lighter battery may be worth the investment.

RossGA · 10-02-2012, 02:28 PM

Don't waste time relocating IMO. The added wire will just give you a net increase in weight unless you go to a lightweight battery.

That being said, a 20lb Deka, Braille, or Odessy battery in the stock location would be a great investment, I think. If you have the cash, there are even 5LB LiPo batteries you can drop in the stock location, but they are several hundred dollars.

A lightweight battery up front will give you added advantage of overall weight savings, it removes weight from the front also helping the balance ratio, and does not incur the weight of adding heavy cables to the trunk.

7thgear · 10-02-2012, 02:59 PM

Quote:

Originally Posted by Ess Vee

Supposedly the FR-S has a 53%-to-the-front/47%-to-the-rear weight distribution.

Anyone work on a battery relocation to the rear to neutralize the weight distribution for better handling?

Also, any other ideas are welcome.

Thanks,
Nathan

Stop reading tuner mags written by drop-out archeologists.

serial gixxer · 10-02-2012, 03:04 PM

^ lol that was funny.

06-12-2012, 07:54 PM	#1
Ess Vee Member Join Date: Jun 2012 Drives: White 2011 Camaro 2SS 6MT Location: Temecula, CA Posts: 47 Thanks: 46 Thanked 13 Times in 7 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Relocating battery to trunk Supposedly the FR-S has a 53%-to-the-front/47%-to-the-rear weight distribution. Anyone work on a battery relocation to the rear to neutralize the weight distribution for better handling? Also, any other ideas are welcome. Thanks, Nathan

06-12-2012, 08:45 PM	#3
mattles Proud of FR Layout Join Date: Jan 2012 Drives: 2013 Scion FR-S 6MT Location: Puget Sound, WA Posts: 984 Thanks: 101 Thanked 381 Times in 228 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	I thought about it, just because my previous car was a miata and had a battery in the trunk stock. I think Im going to take the easy route and just get a very small/lightweight AGM battery to place in the front of this car. Maybe turn it over on its side to get the weight positioned as low in the vehicle as possible. __________________ --Matt // Flickr \\ Instagram

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06-12-2012, 08:14 PM	#2
SUB-FT86 86 Member Join Date: Dec 2010 Drives: 2013 Toyota 86 2.0T (Asphalt) Location: Atlanta, Ga Posts: 3,129 Thanks: 126 Thanked 527 Times in 296 Posts Mentioned: 2 Post(s) Tagged: 2 Thread(s)	It actually has a 55/45 distribution with 0 people in it and if you trying to get to 50/50, good luck.

06-12-2012, 08:54 PM	#4
Miniata Senior Member Join Date: Mar 2012 Drives: 13 BRZ - 90 Miata - 07 FXT -05 Mini Location: Ohio Posts: 546 Thanks: 6 Thanked 142 Times in 105 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	I'd much rather go with a smaller lighter battery up front near the stock location and take 20-25 lbs off the front end, than add the extra weight of a battery box and long cables to run a battery to the trunk, not to mention the loss of trunk space.

06-12-2012, 08:59 PM	#5
blu_ Senior Member Join Date: Mar 2012 Drives: SWP BRZ LTD Location: Portland, OR Posts: 889 Thanks: 637 Thanked 170 Times in 106 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	I think perfectly 50/50 weight distribution is pretty overrated, especially on a car when people seem to be on the throttle flat through most corners. I would also just consider getting a lighter battery if you want to reduce overall weight.

06-13-2012, 06:37 PM	#8
Unleashed Senior Member Join Date: Jun 2012 Drives: 13' WRX Location: Las Vegas Posts: 673 Thanks: 183 Thanked 173 Times in 111 Posts Mentioned: 20 Post(s) Tagged: 1 Thread(s)	Seems kind of pointless to me if it only changes the ratio -1/+1. If you want to even out the weight throw a sandbag in the back hahaha jk

06-13-2012, 06:49 PM	#9
FoolCyclist Member Join Date: Mar 2012 Drives: SWP BRZ Limited, MT Location: Jacksonville, FL Posts: 92 Thanks: 213 Thanked 44 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Why not just go all Good Fellas and throw a 200 pound mobster in the trunk to even things out a bit.

10-02-2012, 02:28 PM	#12
RossGA Member Join Date: Aug 2012 Drives: Audi S4 Location: Utah Posts: 32 Thanks: 15 Thanked 18 Times in 9 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Don't waste time relocating IMO. The added wire will just give you a net increase in weight unless you go to a lightweight battery. That being said, a 20lb Deka, Braille, or Odessy battery in the stock location would be a great investment, I think. If you have the cash, there are even 5LB LiPo batteries you can drop in the stock location, but they are several hundred dollars. A lightweight battery up front will give you added advantage of overall weight savings, it removes weight from the front also helping the balance ratio, and does not incur the weight of adding heavy cables to the trunk.

10-02-2012, 03:04 PM	#14
serial gixxer Senior Member Join Date: Jun 2012 Drives: FR-S Location: SF east bay Posts: 459 Thanks: 363 Thanked 132 Times in 66 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	^ lol that was funny.

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