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Author Topic: Engine differences  (Read 2157 times)

Offline simonbon

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Engine differences
« on: June 13, 2017, 10:12:18 am »

Can someone please advise what the difference between 312.A1.000 and 312.A3.000 engine codes is?




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    Offline rowen16

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    Re: Engine differences
    « Reply #1 on: July 04, 2021, 10:42:47 am »
    yes a question so what is the difference and in actual fact if you were going to swap them over would the engine ecu be suitable for either? .thanks

    Offline a3Jeroen

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    Re: Engine differences
    « Reply #2 on: October 28, 2021, 03:35:12 pm »
    Wild guess: Tjet vs Multiair.

    gr J

    Offline Richard H

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    Re: Engine differences
    « Reply #3 on: October 28, 2021, 07:08:35 pm »
    Only USA market Abarths have Multi-Air...

    According to the internet:
    312.A1.000 is 135 BHP, so an early version
    312.A3.000 is 165 BHP

    I don't know if they could be a straight swap, I'm no expert, its all to do with Body computers and ECUs because all the computers in the car have to talk to each other.

    Offline jl-c

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    Re: Engine differences
    « Reply #4 on: October 28, 2021, 08:20:43 pm »
    If the 312.A3.000 is from a 2010 or so 500C MTA it will be 140BHP. IHI turbo if early, Garrett if later then I think that will be the 165 version.
    Abarth 500C MTA , Audi S4 Quattro Avant , Porsche 911S

    Offline mj2k

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    Re: Engine differences
    « Reply #5 on: October 29, 2021, 12:34:56 am »
    If it's anything like most other cars I've owned and done 'heart transplants' to, the engine itself is dumb, so no need to worry about swapping that over. At most you'll need to swap a couple of sensors over from your old engine to match your existing ecu. Only time you'll have issues is if they've changed the engine mounts between versions (v unlikely) or made some quite dramatic internal change, which e.g. means the sump will no longer fit (seen that, but it's quite rare).

    ECU on the other hand won't transfer across unless you get it 'freshened' - it's coded to the car's BCU and key fobs, so if you swap it the car won't start. 'Freshening' it involves reflashing the ecu to remove those codes, but I suspect that'd also lose any remapping which has been done on the replacement ecu, so unless you know your existing one's up the creek it'd be far better just to get that remapped than getting the extra headaches of trying to get an alien ecu working.

    Also since it's come from a different generation of Abarth, there's no guarantee the loom's going to be the same, so you might need to factor in a full loom swap if nothing works.