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Safety & Race Preparation Roll cages, harnesses, seats, weight reduction, etc. Anything pertaining to taking your car to the highest level of performance.

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  #1  
Old 03-05-2012, 06:08 PM
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Default R50 battery relocation

This has been discussed to death but still hasn't turned up any really useful information.

I've been thinking about trying to relocate my battery either to the trunk (cooper s location) or even just right behind the passenger seat (either in a battery box or with a dry cell) The reason for this is that a majority of the performance intakes were designed for the cooper S thus they go up against the firewall and the R50 intakes are not exactly CAI's.

What I've gathered so far:
Cooper S harness has an explosive charge for "auto disconnect of the battery in an accident"
a factory cooper S harness has battery terminals in the engine bay for jump start
a cooper S harness is heavy for it's function
$400 approx. is the cost of that harness and all of it's extras.
regular batteries need to be sealed in a vented battery box due to toxic fumes
minimum gain (weight, balance, power, etc) I want to do it for future mods and personal satisfaction.

I'm sure i'm missing more things for that list. Just to be clear, i'm not jumping right into this in the next week or so. I'm just figuring things out for this summer before my big trip to Eurohanger
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Old 03-05-2012, 06:48 PM
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can't relocate to cooper s location unless you remove your spare and weld in a box to hold the battery.

i'd just run it to the trunk and rig a brace to hold it in place.
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Old 03-05-2012, 08:58 PM
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Click the image to open in full size.

This was the first setup. Just some long threaded rod with nuts and fender washers on one side and wingnuts on top. The bracket is a universal sliding bracket from Autozone.

This was my janky second setup I put in because of the stereo system I was working on at the time.

Click the image to open in full size.


You're going to have probably $100 in terminals and battery cable at todays prices because of the copper. 0 or 00 is sufficient. Run it inside the car and wrap the cable in tin foil along the rocker panels to prevent interference. Use the same size for positive and ground. Install a quick disconnect somewhere accessible. Its easy enough to get to in the back so you don't need to install any other terminals under the hood for jumping.
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Old 03-06-2012, 12:51 PM
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Originally Posted by Rustyeuro View Post
The reason for this is that a majority of the performance intakes were designed for the cooper S thus they go up against the firewall and the R50 intakes are not exactly CAI's.
Finally found this freaking thread from forever ago:
Operation Hot Air Intake
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Old 03-06-2012, 02:59 PM
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so what i gathered from that is it doesn't really matter where in the bay the filter is mounted.
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