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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 02-04-2014, 09:01 AM
SoCal Hopeless SoCal Hopeless is offline
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Lightbulb Lightweight Battery?

Anyone heard of/using a light-weight battery?

would be sweet to shed 25 lbs

I've heard of people using mini cooper batteries, anyone running this?

Last edited by SoCal Hopeless; 02-04-2014 at 09:04 AM.
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Old 02-04-2014, 10:36 AM
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laser laser is offline
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Why not drive with half a tank of gas and lose 50 lbs

oh ... and your car will start
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Old 02-04-2014, 10:47 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by SoCal Hopeless View Post
Anyone heard of/using a light-weight battery?

would be sweet to shed 25 lbs

I've heard of people using mini cooper batteries, anyone running this?

BMW has engineered yourelectrical power supply for what is required by their vehicle. Not a Coulomb more is needed, and none less. Weight has been minized and optomized....would you slice that short, for a pound or two?
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Old 02-04-2014, 10:58 AM
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bear-avhistory bear-avhistory is offline
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Part of the battery design & placement is to help the 50/50 weight balance.
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Old 02-04-2014, 12:14 PM
fdriller9 fdriller9 is offline
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You're better off driving around with half a tank of gas to save weight.

Fuel averages 6lb/gallon and our fuel tank holds about 16 gallons. It's around 100 lbs with a full tank of gas.

If you're going to get a lightweight battery, I'm assuming you are looking at Braille batteries.

Braille batteries are rebranded Deka batteries. You can get the same battery for half the price....

If you live in a warm climate year around, the lightweight battery may be ok.

If you live in an area that sees cold weather, forget about it. The 21lb braille/deka is 550CCAs. That's just a little bit above half the amount of CCAs an OEM battery provides.

Unless you want to keep a battery heater and tender on the braille/deka all winter, it's not worth it.

25lbs in weight savings may help in time trial, but for a street vehicle? The cons severely outweigh the benefits.
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Old 02-04-2014, 12:40 PM
SoCal Hopeless SoCal Hopeless is offline
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Quote:
Originally Posted by fdriller9 View Post
You're better off driving around with half a tank of gas to save weight.

Fuel averages 6lb/gallon and our fuel tank holds about 16 gallons. It's around 100 lbs with a full tank of gas.

Wow always figured gas weighed the same as water, but you're right. Thanks
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