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    battery relocate

    Im looking to move my battery to the boot, anyone done this? should i run the cables through the firewall or underneath? what gauge cables?

    cheers

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    The cable size I would say 70mm2 to be on the safe side of things. 50mm2 might be a little bit small as it's a fair run.

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    I used 0gauge wire I'd already got wired in from the old stereo system. Ran the wire thru the bulkhead via the spare grommet under the abs ecu & originally down the sill (now goes down the transmission tunnel)

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    Plenty of gromet holes to push new cable through. Mine is behind the front passenger seat in the 850.
    Last edited by JUDGENINJA; Saturday 10th May 2014 at 20:52.


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    Quote Originally Posted by Harvey View Post
    The cable size I would say 70mm2 to be on the safe side of things. 50mm2 might be a little bit small as it's a fair run.
    you sure? that's like 3" and 2" round! about 100kg of copper probably

    Considering battery swap too, i ran the ap wiring along the bottom of the car, but tunnel would probably be best as long as it's well clear of the exhaust?

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    Quote Originally Posted by Henk View Post
    you sure? that's like 3" and 2" round! about 100kg of copper probably

    Considering battery swap too, i ran the ap wiring along the bottom of the car, but tunnel would probably be best as long as it's well clear of the exhaust?
    If you like a read this is quite helpful as it's got a loss calculator in the link.

    http://www.google.co.uk/url?sa=t&rct...5ja5caZMo9wc1g

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    Do you not find it strange that the two people to have done it have non functioning cars.

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    Quote Originally Posted by Henk View Post
    you sure? that's like 3" and 2" round! about 100kg of copper probably

    Considering battery swap too, i ran the ap wiring along the bottom of the car, but tunnel would probably be best as long as it's well clear of the exhaust?
    Quote Originally Posted by Harvey View Post
    If you like a read this is quite helpful as it's got a loss calculator in the link.

    http://www.google.co.uk/url?sa=t&rct...5ja5caZMo9wc1g
    if you look at cars which have the battery in the boot from the factory (S60 & BMW's spring to mind) the wiring they use really isn't that thick, & i'm sure they wouldn't risk using it if there was a chance of overheating

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    Quote Originally Posted by p fandango View Post
    if you look at cars which have the battery in the boot from the factory (S60 & BMW's spring to mind) the wiring they use really isn't that thick, & i'm sure they wouldn't risk using it if there was a chance of overheating
    Surely the best bet would be to have the battery cables out of a S60 that's being broken.

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    Quote Originally Posted by p fandango View Post
    if you look at cars which have the battery in the boot from the factory (S60 & BMW's spring to mind) the wiring they use really isn't that thick, & i'm sure they wouldn't risk using it if there was a chance of overheating
    A S60R uses 70mm squared cable from the battery to the engine bay.

    As I`m using some cable from one of the S60R I`ve broken for my battery to starter motor to alternator cable

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    Harvey (Saturday 10th May 2014)

  14. #11
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    Quote Originally Posted by stribo View Post
    Surely the best bet would be to have the battery cables out of a S60 that's being broken.
    it is an option. But the wire they use isn't anything special, plus all the hassle of getting it out of the shell & no doubt they run it under the car will make it a pain to get out

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    The thing is any of the car maker will get the cables made to the the size required down to the mm2 that they required,to save weight & costs.
    But if you go and buy battery cable it will be 35mm2 or 50mm2 or 75mm2 ,you don't get much choice over the counter, on a 10m roll.

  16. #13
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    Quote Originally Posted by p fandango View Post
    it is an option. But the wire they use isn't anything special, plus all the hassle of getting it out of the shell & no doubt they run it under the car will make it a pain to get out
    On the S60R the cable runs under the carpet/soundproofing.

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    Mines in the boot, ran the cables under the car, has megafuses at each end



    I also ran a new earth feed to the front


    Front megafuse


    The cable runs to a powerstud mounted on the inner wing.





  18. #15
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    Quote Originally Posted by stribo View Post
    Do you not find it strange that the two people to have done it have non functioning cars.


    Current Garage:
    1997 960 3.0L 24v - Polestar...(Honest guv..!!)
    1997 855 T5 S - stripped to 1300kgs gross weight - 14.2sec qtr(rank 17*)
    2001 V40 T4 SE - 14.199@100.15MPH - Hybrid Turbo/VXR injectors and DeCat(Rank 15*)
    *Data Sept 2013
    Any Stuff For Sale - check out my Ebay link

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