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Motorsports & Track Forum
From Auto-X to Trackday to Racing and Professional Motorsports this is the place to discuss making BMWs fast

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Old 06-15-2012, 02:46 PM   #1
disapr
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Relocating the battery

Who has relocated their battery to the engine bay location in a race car? I need to move it away from the fuel tank vent and I'm using a Braille B129.

Just curious if anyone has an example of this being done or if there are any potential issues wit this.

Thanks,
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Old 06-15-2012, 06:12 PM   #2
MasterC17
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Hmm, I understand it needs to not be close to the fuel tank, but re-locating it to the engine bay probably isn't the best idea. I think the rear seat area would be a better location. Anywho, I've never heard of anyone doing this.
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Old 06-15-2012, 08:46 PM   #3
disapr
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Why do you think that the engine bay is a bad location for it? Where else have you seen the battery moved to (pic?)
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Old 06-17-2012, 08:39 PM   #4
MasterC17
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Weight distribution. These cars need weight in the rear, if anything. Plus, just not really seeing the benefit of moving it around so much. Also means you would need to change the wiring. Honestly, I've never seen anyone relocate the battery in an E46.
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Old 06-18-2012, 12:31 PM   #5
disapr
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Seems like a fair amount of interest based on views but no solid info.

The compartment up front looks like a perfect place for the battery and the one that I'm using is only 9.5lbs. I've removed that much emissions and window washing equipment so I'm not really concerned about the weight being there and not in the rear.

How about the fuel cell guys, where are you relocating the battery to in the the e46?
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Old 06-18-2012, 04:18 PM   #6
MasterC17
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Everyone I've seen puts it there. Just saying, why wouldn't you? Moving it to the engine compartment would just be more of a pain.
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Old 06-18-2012, 04:35 PM   #7
disapr
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I was actually just looking at that picture. That's a fine location for the battery and even works better for me based on where my master switch is located. My main reason for moving it to the engine bay was to avoid having to use a sealed battery box but that's not a big deal, I'll check some of the race shops and see what's available.
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