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Thread: Big 3 Upgrade

  1. #1
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    Default Big 3 Upgrade

    Hi Guys,

    I am considering to do the "Big 3" upgrade. In other words, upgrading the following cables:

    1) alternator positive to battery positive
    2) battery negative to chassis
    3) engine ground to chassis

    There is plenty of stuff online about it but wondering if anyone has done this on a Vectra C? this may give me an idea of cable lengths and generally if its straightforward or not.

    I Hope to get some tips

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    Regular Member XPCobra's Avatar
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    Vehicle : Vauxhall Vectra Hatch

    Trim : SRI with added X-Pack

    Engine : 1.9 16v 150

    Year : 2006

    Mileage : Near 100K

    Default

    I thought it was only older cars which befinited from this treatment?

    I added a ground wire from the alternator area to the O/S/F strut top - Didnt really make much difference.

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    Vehicle : Dodge Journey

    Trim : SXT

    Engine : 2.0Tdi (VW Engine)

    Year : 2010

    Mileage : 53000

    Default

    It benefits any cars charging system, you can get up to 0.5v from doing the big three.

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    Default

    Well I am considering the upgrade to improve my after market sound system, ive noticed the dash dimming slightly when i crank up the volume. It seems the factory cables are already 4 gauge, so could probably upgrage to 0 gauge

  5. #5
    Full Member merikiito's Avatar
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    Vehicle : Insignia CDTi SRi NAV 160

    Trim : SRi

    Engine : A20DTH

    Year : 2009

    Mileage : 88000

    Default

    Wouldn't it be better to upgrade the alternator?

    What Vectra do you have?
    Lois Griffin: Peter! You're bribing your daughter with a car?
    Peter Griffin: Ah, c'mon, Lois, isn't 'bribe' just another word for 'love'?

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    Default

    I dont think Ill need a new alternator, im pretty sure Ill get away with the 120A stock alternator. I have a 2.0 DTI..

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    Full Member merikiito's Avatar
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    Vehicle : Insignia CDTi SRi NAV 160

    Trim : SRi

    Engine : A20DTH

    Year : 2009

    Mileage : 88000

    Default

    Well the CDTi 1.9 one I think is 140A if you go that route
    Lois Griffin: Peter! You're bribing your daughter with a car?
    Peter Griffin: Ah, c'mon, Lois, isn't 'bribe' just another word for 'love'?

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    Regular Member Mr Owens's Avatar
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    Vehicle : Vectra

    Trim : Sri

    Engine : 2.2 direct

    Year : 2004

    Default

    I've only ever bothered upgrading the battery earth and chassis earth on other cars as I always run a 2nd battery for my sound system, hopefully I can make a start on mine this weekend, I might upgrade the alt power cable when I do mine as I get slight light dimming issues as it is.
    If the current draw is too much for your standard battery then you may want to look at adding a 2nd one

  9. #9
    Full Member Leemarksmith's Avatar
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    Vehicle : Vectra

    Trim : SRi (VXR Styling)

    Engine : Z19DTH (Re-mapped)

    Year : 04

    Mileage : 110k

    Default

    How do you wire up a second battery? Series or parallel?

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    Vehicle : Dodge Journey

    Trim : SXT

    Engine : 2.0Tdi (VW Engine)

    Year : 2010

    Mileage : 53000

    Default

    Parallel (+ to +, -to- ) think you just have to make sure its the same as the one in the front otherwise the smaller one will drag the bigger one down.

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