Battery relocation to rear
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Thread: Battery relocation to rear

  1. #1
    Fellow Frogger!
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    Default Battery relocation to rear

    Again, I am after some words of advice, AND GUIDANCE.
    I am relocating my frogs battery to the boot.

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    I have a Fuego and want to install an oil cooler.
    Problem is it won't do the "in front of radiator thing".
    Hence I am thinking of relocating the battery (wet cell) to the boot.
    What are the regulations with respect to this in a road going car in vic?

    Questions:
    Lines inside or outside of car?
    Vent obviously, but does it have to be a sealed box?
    Engineering certificate (hope not)?

    Anything else I may have overlooked?

    Regards 85

  2. #2
    1000+ Posts robmac's Avatar
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    Questions:

    Lines inside or outside of car?
    If outside sleeve in heavy duty rubber hose
    If inside (best option) 35mm^2 welding cable, well secured is Ok
    Flexible Welding Cable | Electra Cables

    Vent obviously, but does it have to be a sealed box?
    Large Battery Box - Supercheap Auto
    Bolted to the boot floor, with a 25mm diameter vent hose to outside.

    Engineering certificate (hope not)?
    I've never bothered.
    But if you are concerned, make you own enquiries


    Anything else I may have overlooked?


    Look for a suitable chassis earth point in the boot and makes sure the engine has a good earth to chassis as well.
    Solder or crimp lugs to cable and heat shrink the exposed sections to insulate.

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    All I can say is that my sons Porsche 944 has the battery located in the wheel well area of the boot so o.k. in Victoria, fit new copper cabling well shielded and you should have no problem. Fuego already has relays, so if you have supply/voltage drop problems fit a few more on the longer runs.

    There are wheel well and tool storage areas in the boot, work out the best location, perhaps in the long tool storage area immediately behind the rear seats, there is probably room to construct and drop in a custom made battery box, as long as it clears the petrol tank, could even be centrally located in that area, I only use that for a spare clutch cable and spare rad hoses and some overalls anyway.

    The drivers side tool compartment in the boot well could also be used, but you might have to relocate the wheel jack and crank handle.

    Ken.

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    1000+ Posts jo proffi's Avatar
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    Quote Originally Posted by 85Fuego View Post
    Again, I am after some words of advice, AND GUIDANCE.
    I am relocating my frogs battery to the boot.

    I have a Fuego and want to install an oil cooler.
    Problem is it won't do the "in front of radiator thing".
    Hence I am thinking of relocating the battery (wet cell) to the boot.
    I don't get the correlation between oil cooler and battery location?????

    I ran a pug 205 oil heat exchanger on my my fuego… Virtually a bolt on job.

    Jo

  5. #5
    1000+ Posts robmac's Avatar
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    fit new copper cabling well shielded
    I'm curious the theory behind why you would suggest shielded battery cable ?

    I've would have thought (and have always successfully used) basic welding flex and found it to be entirely suitable.
    Last edited by robmac; 10th February 2017 at 05:21 PM.

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    1000+ Posts renault8&10's Avatar
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    I think he is referring to outer sleeving as per your first post. Stop thinking like an electrician and shielded takes on a different meaning.
    KB


  7. #7
    1000+ Posts robmac's Avatar
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    Let's hear it from Ken, I wouldn't dare to double guess his meaning.

    However I agree , protection is the a key part of the install.

    FWIW 35mm^2 double insulated welding cable is available at around $10/ m on ebay.

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    Hi
    Most of the suggestions have been well made already.
    My comment would be the engineering certificate. No bloody way would this be needed ! No changes are being made to any basic engineering parts. If you make any changes in a workman like manner suitable for the purpose, no need to inform or ask any authority, or insurance company either. On principle !!!
    Jaahn

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    Quote Originally Posted by jo proffi View Post
    I don't get the correlation between oil cooler and battery location?????

    I ran a pug 205 oil heat exchanger on my my fuego… Virtually a bolt on job.

    Jo
    Hi Jo

    The std cooler came at a very good price.
    The idea was to fit it in front of the fans but I can't get the 235mm x 51mm unit up front.
    Hence the thought of putting the unit where the battery lives with a duct up through the battery floor.
    Hence the questions.

    85

  10. #10
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    Queensland rules for battery relocation
    Frequently asked questions?vehicle standards and modifications (Department of Transport and Main Roads)

    Extract from this

    It is permissible to relocate a vehicle's battery, provided it meets the following requirements:

    The battery is adequately restrained
    Cables are shielded to prevent damage
    Rubber grommets must be fitted where a cable passes through a hole in body panels and/or chassis sections
    Battery cables are securely mounted to the vehicle at a maximum spacing of 600mm
    Battery cables are adequate to carry the electrical system's maximum load
    The battery must be fully enclosed and the enclosure vented to outside the vehicle (unless a special kind of battery e.g, a sealed gel cell is used).

  11. #11
    1000+ Posts robmac's Avatar
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    Quote Originally Posted by driven View Post
    Queensland rules for battery relocation
    Frequently asked questions?vehicle standards and modifications (Department of Transport and Main Roads)

    Extract from this

    It is permissible to relocate a vehicle's battery, provided it meets the following requirements:

    The battery is adequately restrained
    Cables are shielded to prevent damage
    Rubber grommets must be fitted where a cable passes through a hole in body panels and/or chassis sections
    Battery cables are securely mounted to the vehicle at a maximum spacing of 600mm
    Battery cables are adequate to carry the electrical system's maximum load
    The battery must be fully enclosed and the enclosure vented to outside the vehicle (unless a special kind of battery e.g, a sealed gel cell is used).
    I wonder if the Victorian regulations are the same ?

  12. #12
    1000+ Posts renault8&10's Avatar
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    85Fuego probably hopes so!

    And robmac, the cables must be shielded! Perhaps your welding flex isn't suitable? ; )
    KB


  13. #13
    1000+ Posts jo proffi's Avatar
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    Battery relocation to rear-cooler-1.jpg
    The easy way to cool the oil.
    Jo

  14. #14
    1000+ Posts robmac's Avatar
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    Quote Originally Posted by jo proffi View Post
    Click image for larger version. 

Name:	cooler - 1.jpg 
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    The easy way to cool the oil.
    Jo
    And to add heat load to your radiator

  15. #15
    1000+ Posts jo proffi's Avatar
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    Quote Originally Posted by robmac View Post
    And to add heat load to your radiator
    Obviously.

    It will cope, as will un-cooled engine oil in a fuego.

    Unless doing red line burn outs at 0 km/h or towing tractors up steep hills in first gear is your thing, there is plenty of cooling capacity to spare in a healthy fuego.
    Airflow is the limiting factor due to poor thermo fan design, but oil temps only climb during high speed runs, where (in my car) there was more than enough airflow through the radiator to cope.

    From memory, with the pictured cooler, at 120km/h oil would sit at 112 degrees C and coolant would be at steady at 84 degrees.

    Oil temp would fluctuate with load, but coolant temp would remain steady.

    I was always more worried about how long it took the oil to come up to temp than how hot it climbed once at temp.

    Jo

  16. #16
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    Quote Originally Posted by jo proffi View Post
    From memory, with the pictured cooler, at 120km/h oil would sit at 112 degrees C and coolant would be at steady at 84 degrees.
    Hmmmmmm, chasing clios and being left for dead by nissan gtr's around Phillip Island saw my temp climb to 125C.

    Quote Originally Posted by jo proffi View Post
    I was always more worried about how long it took the oil to come up to temp than how hot it climbed once at temp.
    Obviously no thermostat fitted in the oil cooler circuit?

  17. #17
    1000+ Posts jo proffi's Avatar
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    Quote Originally Posted by 85Fuego View Post
    Hmmmmmm, chasing clios and being left for dead by nissan gtr's around Phillip Island saw my temp climb to 125C.



    Obviously no thermostat fitted in the oil cooler circuit?
    A coolant/oil heat exchanger does not require a thermostat.
    What I meant was how long it took to get the oil up to temp it n an oe engine. Whilst i never took before and after temp data, it would make sense that an engine with the pictured heat excanger would see its oil come up to temp earlier.

  18. #18
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    Quote Originally Posted by jo proffi View Post
    What I meant was how long it took to get the oil up to temp on an oe engine. Whilst i never took before and after temp data, it would make sense that an engine with the pictured heat exchanger would see its oil come up to temp earlier.
    Jo
    Ok agree.
    85

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