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Thread: VAG coil conversion guide

  1. #1
    Guest nismo's Avatar
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    VAG coil conversion guide

    I decided to convert my car to VAG coils and as I like to do things myself i set about finding out what I needed, there is alot of conflicting info. So after getting mine up and running smoothly I will pass the info on.

    I am running a standard ECU with stage 3 chip HDEV.

    Its cheap and fairly straight forward if you are handy with a soldering iron.

    Parts Required.

    Yakazi male plugs

    1 off 7122-1844-40 4 pin
    2 off 7122-1864-40 6 pin

    sourced these from Auto-Click UK cost 15

    VAG plugs female

    4 off pre wired

    sourced from E-Bay cost 17

    Coils

    There are two main types off VAG coils, short type and R8 type. I went for short type as I wanted to retain the standard look. The cover does not fully go down it needs to be spaced up by 6mm ( helps cooling ). You will also need to decide on coil type BEFORE making the loom as they are wired differently.

    036 905 715F short type tfsi
    dwell time 1.3ms
    PIN
    1 ECU ground
    2 ground
    3 +12 volts
    4 ecu signal

    0221604 115 long R8 coil
    dwell time 1.8ms
    PIN
    1 +12 volts
    2 ecu ground
    3 ecu signal
    4 ground


    Wiring

    i used 2.5 mm high temperature wire. soldered joints and heatshrink

    wiring guide to follow shortly..

    Drawn by cad.

    https://flic.kr/p/2e61Hvx
    Last edited by nismo; 09-04-2019 at 18:22.

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    I saw some NGK red coils on someones SR and they sat lower than mine/everyone elses. number 1 coilpack was flush with the top of the rocker cover. the reconed they were straight out the box like that.

  3. #3
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    a bit of info on the vag coils here as well. https://www.sxoc.com/vbb/showthread....R20&highlight=

    However ive read the 350z coils also fit and have started to be used so for anyone considering the swap its an option. The standard Nissan plugs fit the 350 coils but they need a couple of the wires swapped / repined and the ignitor needs bypassed as well so not a straight swap.

  4. #4
    Guest speedingmofa's Avatar
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    The coils i use, use the same pinouts. So the black ones (1.8T) and red ones (R8) are interchangeable. I've used them and many clients have used them also without any issues.

  5. #5
    Guest nismo's Avatar
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    Mod. Can you add this to stickies please.

  6. #6
    Member sx rider's Avatar
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    What are the benefits of doing this conversation?

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    Guest speedingmofa's Avatar
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    Quote Originally Posted by sx rider View Post
    What are the benefits of doing this conversation?
    The benefits of this conversation... I guess sharing a bit of knowledge with the community

    This conversion though.... It's only got advantages! A few minor disadvantages as far as i know.

    Advantages:
    VAG coils are rated at 200hp per cylinder
    Much stronger spark vs outdated nissan/splitfire technology, so better output and smoother idles, maybe due to cleaner combustion?
    Loads of boost without blow out, you can increase gap and still have no blow out (increased gap is supposed to add some low end torque i heard?)
    Cheap as chips at 20-25 a piece, europe is flooded with these parts too if you're into 2nd hand coils

    Disadvantages:
    Higher current draw
    Non-removable tall stalk (looks like crap in shallow spark plug holes)

    I'm now looking into genuine 370z coils, higher power output and lower current draw. But that's a project for in the future. They're not very common (yet) in the EU. But in the USA, they're about 60USD for a used set of 6, same loom with a bit of repinning, makes things a bit more interesting

    Btw, i still have some 6 pins Yakazi plugs left in case anyone wants to experiment in making their own loom
    Last edited by speedingmofa; 10-04-2019 at 11:25.

  8. #8
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    I went for the black 1.8 vag coils and it made a big difference to idle smoothness because I can run a 1.1mm gap and still make 350hp without misfires

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    Oh and I got a set of brand new Bosch coils for 60 quid and that’s about the price of second hand 20 year old coils for an SR

  10. #10
    Guest speedingmofa's Avatar
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    Quote Originally Posted by autosri View Post
    Oh and I got a set of brand new Bosch coils for 60 quid and that’s about the price of second hand 20 year old coils for an SR
    PM me where u got those from plzz

  11. #11
    Member sx rider's Avatar
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    Quote Originally Posted by speedingmofa View Post
    The benefits of this conversation... I guess sharing a bit of knowledge with the community

    This conversion though.... It's only got advantages! A few minor disadvantages as far as i know.

    Advantages:
    VAG coils are rated at 200hp per cylinder
    Much stronger spark vs outdated nissan/splitfire technology, so better output and smoother idles, maybe due to cleaner combustion?
    Loads of boost without blow out, you can increase gap and still have no blow out (increased gap is supposed to add some low end torque i heard?)
    Cheap as chips at 20-25 a piece, europe is flooded with these parts too if you're into 2nd hand coils

    Disadvantages:
    Higher current draw
    Non-removable tall stalk (looks like crap in shallow spark plug holes)

    I'm now looking into genuine 370z coils, higher power output and lower current draw. But that's a project for in the future. They're not very common (yet) in the EU. But in the USA, they're about 60USD for a used set of 6, same loom with a bit of repinning, makes things a bit more interesting

    Btw, i still have some 6 pins Yakazi plugs left in case anyone wants to experiment in making their own loom

    Cool, thanks for the info

  12. #12
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    Quote Originally Posted by speedingmofa View Post
    PM me where u got those from plzz
    It was just a local motor factors

  13. #13
    Guest nismo's Avatar
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    Sticky?

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    New to this forum,
    Just wanted to say a massive thank you for posting this, I have successfully done this conversion on my CA and its running nicely.

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