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Thread: Sprite Petronix Electronic Ignition

Discuss the Austin Healey Sprite and the MG Midget. Two different but similar cars sometimes referred to collectively as the Spridget.

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    Sprite Petronix Electronic Ignition

    Hello all


    I have a Sprite and ordered the positive earth electronic ignition for the 1275cc i have. The instructions said I needed non-solid spark plug wires. I'm unsure what that means. Could anyone please help by explaining or maybe providing a brand a model of the wires.


    Thanks!

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    Re: Sprite Petronix Electronic Ignition

    They are saying to not use solid (wire) core spark plug wires. They want you to use resistor wires. Resistor wires typically have a center that looks like it is made up of a bunch of carbon fibers.

    You should be able to get what you need from any of the usual vendors (BP Northwest, VB, Moss, TRF, etc). Just look for "resistor wires", not "solid core".
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

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    Re: Sprite Petronix Electronic Ignition

    I did the same conversion and it's worked out well... but I still carry the original dizzy in a toolkit in the car.
    - Mark

    Former 1956 Austin Healey 100-4 (BN2)
    Former 1962 Mk1 Austin Mini (850)
    Former 1973 Austin Mini (really a 1980s Cooperized Mini)
    Present 1959 Austin Healey "Bugeye" Sprite (with 1275, 5 speed, discs, etc)

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    Re: Sprite Petronix Electronic Ignition

    Quote Originally Posted by Boink View Post
    I did the same conversion and it's worked out well... but I still carry the original dizzy in a toolkit in the car.
    Wise choice.. either that or carry a 2nd pertronix for when the first one fails.

    I went to a CRANE unit over 10 years ago after my pertronix failed. I admit the failure to be my fault. I installed it in such a manner that the rotor rubbed the wires inside the dizzy and that caused the wire to break........ but it was a $250 tow bill. I have heard of other failures with the pertronix though, but NEVER once a CRANE failure. It is now the FAST XR700.
    Bill L.

    1966 Sprite MK III - "the red thing"
    HAN8L49403

    President, Pacific Northwest Chapter,
    Sprite Midget Club, USA
    (Excepting Greater Seattle)

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    Re: Sprite Petronix Electronic Ignition

    Thanks for you explanation. Would you be able to tell if these are "resistor wires" from the picture and description? https://mossmotors.com/cobalt-igniti...-948-1098-1275

    Thanks in advance.

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    Re: Sprite Petronix Electronic Ignition

    Thank you all for the suggestions. This is the first time I rebuild an engine on my own. So far it has been a lot of fun and a great learning experience. Look forward to sharing some pics once its done.

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    Re: Sprite Petronix Electronic Ignition

    Not sure but give Moss a call on their 800 number and they can tell you.
    Was Man nicht im Kopf hat muss Man in den Beinen haben
    '48 Ford Prefect
    '67 Sprite (project)
    '74 Super Beetle
    http://enfoprefect.org

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    Re: Sprite Petronix Electronic Ignition

    Quote Originally Posted by Pythias View Post
    Wise choice.. either that or carry a 2nd pertronix for when the first one fails.
    I went to a CRANE unit over 10 years ago after my pertronix failed.
    I have had a Crane failure.

    I had the Crane/Alison ignition on the GT6 for years. I washed the engine bay one day. The remote amplifier got water in it and failed. You could say getting water in it was my fault but the amplifier was supposed to be potted to protect the electronics. The GT6 now has a Pertronix module.

    The OP said he bought a Pertronix ignition, not a distributor. Therefore a complete spare distributor in the boot may not be an option. Carrying a spare Pertronix is obviously possible but expensive. For a lot less money you can carry a set of points and condenser in the boot. You can install those whenever necessary to get home.

    There is one warning that should be mentioned to the OP since we are talking about ignition module failures. With the Pertronix installed, never leave the key in the RUN position with the engine NOT running. This can overheat the module causing it to fail. Pertronix has warned that with the engine not running, the time the key is left in RUN position should be limited to no more than 1 to 5 minutes (different techs have told people different time limits).

    Regarding the Cobalt wires, the text at Moss describes these as "spiral core". Usually that means the wires reduce ignition system noise with inductance instead of resistance. That may not do what Pertronix wants your plug wires to do. I would call Pertronix and ask about them. I have NO experience with the plug wires linked below but they are resistor wires.
    https://www.rockauto.com/en/moreinfo...204872&jsn=331

    Keep in mind that if you are using a right-angle distributor cap, almost any resistor wires you find will require you to remove the crimped on terminals and insert the wire end into the cap. Most plug wire sets these days are made for the "straight" caps.
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

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    Re: Sprite Petronix Electronic Ignition

    If I recall correctly I used Bosch plug wires. Some sets for VWs (bug) have right angle ends. ..

    I found it's better to get a spare dizzy and set it up with points/condensor and carry that. Much easier to swap out a dizzy by the side of the road than to try to install and gap points.

    YMMV

    My 2
    Bill L.

    1966 Sprite MK III - "the red thing"
    HAN8L49403

    President, Pacific Northwest Chapter,
    Sprite Midget Club, USA
    (Excepting Greater Seattle)

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    Yoda Boink's Avatar
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    Re: Sprite Petronix Electronic Ignition

    Quote Originally Posted by Olivia0424 View Post
    Thanks for you explanation. Would you be able to tell if these are "resistor wires" from the picture and description? https://mossmotors.com/cobalt-igniti...-948-1098-1275
    Thanks in advance.
    Those will be fine.
    - Mark

    Former 1956 Austin Healey 100-4 (BN2)
    Former 1962 Mk1 Austin Mini (850)
    Former 1973 Austin Mini (really a 1980s Cooperized Mini)
    Present 1959 Austin Healey "Bugeye" Sprite (with 1275, 5 speed, discs, etc)

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    Re: Sprite Petronix Electronic Ignition

    Quote Originally Posted by Pythias View Post
    I found it's better to get a spare dizzy and set it up with points/condensor and carry that. Much easier to swap out a dizzy by the side of the road than to try to install and gap points.
    Definitely!
    - Mark

    Former 1956 Austin Healey 100-4 (BN2)
    Former 1962 Mk1 Austin Mini (850)
    Former 1973 Austin Mini (really a 1980s Cooperized Mini)
    Present 1959 Austin Healey "Bugeye" Sprite (with 1275, 5 speed, discs, etc)

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