1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Starter motor wire

Discussion in 'Car Repairs / Maintenance' started by dan77714, 1 Jan 2017.

  1. dan77714

    dan77714

    Joined:
    20 Nov 2011
    Messages:
    23
    Thanks Received:
    1
    Location:
    London
    Country:
    United Kingdom
    Hi guys, I was hoping for some advice regarding the cable for a starter motor. I am currently working on a custom car and was wondering, would it be safe to use some jump leads which are 16mm^2 and supposedly rated at 300amps to run from the battery to the starter motor if I cut off the ends and crimp some ring terminals on them. The cable length I would be running is about 1 metre(probably less) from the battery to the starter motor.

    Thanks in advance!
     
  2. Tigercubrider

    Tigercubrider

    Joined:
    22 Jul 2016
    Messages:
    2,561
    Thanks Received:
    368
    Country:
    United Kingdom
    Possibly but hard to say unseen

    But you can buy ready made and crimped cables for not much on ebay or generic car parts suppliers
     
  3. Astra99

    Astra99

    Joined:
    1 Feb 2011
    Messages:
    795
    Thanks Received:
    126
    Location:
    Gloucestershire
    Country:
    United Kingdom
    Before a definitive answer may be given, we need to know what engine the custom car is using. If you can let us know the donor vehicle all well and good. Normally, however, for a petrol engine up to about 2.0 litres, 16mm² would be adequate, but for larger petrol and diesels, 25mm² or even 35mm² (for large engines) may be required. I would also be inclined to crimp and then solder the ends on, especially at the starter motor.
     
  4. dan77714

    dan77714

    Joined:
    20 Nov 2011
    Messages:
    23
    Thanks Received:
    1
    Location:
    London
    Country:
    United Kingdom
    Hi, thanks for your response.

    The engine is actually a 600cc bike engine, its for a kart type vehicle. Here is a link to the jump leads. http://www.eurocarparts.com/ecp/p/c...and-breakdown/jump-leads/?549777351&0&cc5_192

    If I were to purchase some cable, what gauge would you recommend? I was thinking 2AWG just from some general googling of cable ratings but i'm not sure. 2AWG seems a little more difficult to get a hold of so i'm wondering if maybe its rated higher than I would actually need (which isn't a bad thing of course). What would you recommend?
     
  5. Burnerman

    Burnerman

    Joined:
    7 Feb 2008
    Messages:
    19,857
    Thanks Received:
    3,836
    Location:
    Northumberland
    Country:
    United Kingdom
    For that size of engine, the jump leads will be just fine.....use crimped ends, similar to the original.
    John :)
     
  6. magicmushroom666

    magicmushroom666

    Joined:
    11 Jan 2010
    Messages:
    225
    Thanks Received:
    37
    Location:
    Essex
    Country:
    United Kingdom
    Look into welding cable suppliers, I've made up some 0AWG cables before from the stuff, and was able to buy it by the M very cheaply. The suppliers are lilkely to have crimp terminals etc that will suit.
     
  7. Belle427

    Belle427

    Joined:
    16 Jan 2006
    Messages:
    2,901
    Thanks Received:
    273
    Location:
    Newport, S Wales.
    Country:
    United Kingdom
    300 Amps for those cables is being a bit optimistic. A good quality 16 mm cable is rated around 110 Amps.
    Welding cables as suggested are widely available on ebay, crimping the ends correctly is usually the hardest part for the diyer as good tools are not cheap.
    Any idea of the starter rating in Watts?
    If you know this figure divide it by the Voltage to get your current in Amps.
    ie 300 Watts / 12 Volts = 25 Amps.
     
  8. DaveHerns

    DaveHerns

    Joined:
    11 Nov 2009
    Messages:
    2,583
    Thanks Received:
    207
    Country:
    United Kingdom
    What size wire did it have when fitted to the bike ? And, out of interest, what kind of custom car is this ? Any chance of some photos?
     
  9. dan77714

    dan77714

    Joined:
    20 Nov 2011
    Messages:
    23
    Thanks Received:
    1
    Location:
    London
    Country:
    United Kingdom
    Thanks very much for the responses I am not sure of the exact stock wire size i'll have to look into that. The car is a racecar for the FSAE competition. We're still in the manufacturing stage at the mo so I don't have any pics but will probably post some soon once we've completed all the assembly.
     
Loading...

Share This Page