Results 1 to 4 of 4

Thread: 12V Power Supply

  1. #1
    BMWHaus Guru
    Join Date
    Oct 2013
    Posts
    1,808

    12V Power Supply

    Hi folks,

    Does anyone have a 12v power supply that will supply operating voltage and current up to 80A? I want to apply a map to the DME in the coming weeks and want to reduce any risks associated it. The recommendation from BMW for the E9x is a power supply that can deliver operating voltage and current up to 80A. I don't really want to go buy one just for a single use so if anyone had one they could loan to me I'd happily sort them out for it.

    Thanks!
    Last edited by Ketron; 01-03-22 at 20:46.
    E92 Interlagos Blue M3 - Current
    F10 Sophisto Grey 530d M-Sport - Sold
    F21 M135i Estoril Blue - Sold
    E92 Sapphire Black 335d M-Sport
    - Sold
    E36 328i SE Low Miler - Sold
    E46 Estoril Blue M3 - Sold
    E46 Titan Silver 330ci Clubsport - Sold
    E36 Cosmos Black 318is - Dead

  2. #2
    BMWHaus Contributor
    Join Date
    Jul 2013
    Posts
    470
    That's a high enough current , I doubt you'll find something on a 13a plug that will do that. I've a programmable DC supply but it only goes up to 4 amp , the alternative might be a NoCO booster or a smart charger maybe ? I've all but based in Galway , I think you're in the East ?

  3. #3
    BMWHaus Guru
    Join Date
    Oct 2013
    Posts
    1,808
    Yeah its crazy enough, the idea is to keep the voltage perfectly stable when coding, There are ones like this:

    https://www.amazon.com/Schumacher-IN.../dp/B002Z2Z7ZY

    Its 1360W at 13.6v so a 13a fuse should handle it, but the more I look into most people just use a 25A supply without issue.

    Thanks for the offer I have a CTEK battery tender that has a supply mode at 13.6v but its only at 10a, I might look at making a supply to do this.
    E92 Interlagos Blue M3 - Current
    F10 Sophisto Grey 530d M-Sport - Sold
    F21 M135i Estoril Blue - Sold
    E92 Sapphire Black 335d M-Sport
    - Sold
    E36 328i SE Low Miler - Sold
    E46 Estoril Blue M3 - Sold
    E46 Titan Silver 330ci Clubsport - Sold
    E36 Cosmos Black 318is - Dead

  4. #4
    Junior Member
    Join Date
    Sep 2021
    Posts
    7
    If you are careful, you don’t need anywhere near that power. Make sure everything is off and don’t move electric seats etc.

    When I was getting coding done on my f36, the power supply was showing 25-35 amp draw with everything switched off but ignition on.

    A 25 amp power supply would be a little skimpy but you might get away with it. Use it to make sure the battery is fully charged before you start.

    Gys flash power supplies are used by a lot of dealers and professional coders. Something like this 50 amp would do the job nicely:
    https://www.gys.fr/prod-026056-C106/....5M_CABLES)/en

Similar Threads

  1. E60 down in power...?
    By frosty in forum General Car Chat
    Replies: 3
    Last Post: 06-10-15, 19:31
  2. Low end grunt VS Top end power / Power Delivery Preference
    By Peter-E36 in forum Engine & Servicing
    Replies: 14
    Last Post: 15-09-14, 22:27
  3. H&R Cup Kit Supply & Fit Offer
    By Alloy-Wheels.ie in forum Alloy-Wheels.ie
    Replies: 9
    Last Post: 24-03-14, 15:04
  4. Less power
    By GerH in forum 3 Series
    Replies: 24
    Last Post: 10-10-13, 10:59

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •