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Thread: MDS-280zx dizzy-magnetic pickup-tach?

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    Default MDS-280zx dizzy-magnetic pickup-tach?

    Hey All,
    Just gotta tell you with all the info here I got the 240 to fire right up with the 280 dizzy. I even found a few threads on NOT using the spendy little 12-80 module. It works great! With the 12-80 module I would have to use the Weber starting procedures (two pedal pumps and third pedal to start). With the 12-80 module removed using the magnetic pickup from my MSD 6 connected to the 280's dizzy green and red wires it fires with no choke, no pedal pumps, no one third pedal! Fires up with less than a full crank too! I'm sold on that configuration! (I'll post schematics and pics later) But my tach does not work!!!!! lol
    I'm guessing I need the MSD 8910 tach adaptor. The docs I have seen show to hook it up using the switched power (black/white) and the white from the MSD. This is for when you are using the 12-80 module and the white goes to the module. I am not using the white I am using the magnetic pickup (green+violet). Anyone have an idea on how to get that working? Thanks again everyone. BTW....I have two 12-80 modules for sale!!!! anyone? anyone?
    Mike

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    Registered User beezee's Avatar
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    I have the same set-up msd 6 with an early mag pick-up dizzy (pre 12-80) and required the http://www.classiczcars.com/photopos...0&ppuser=15041
    User Gallerytach adapter .Just wire to msd instructions to restore the tach operation

  3. #3
    Registered User beezee's Avatar
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    Don,t know what happened there ,but yes you do need the tach adapter

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    It looks like instead of the 8910 tach adaptor I will need the 8920.....a little more expensive than the 8910. I wonder if a 280 tach will work without an adaptor??? Anyone know?

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    Registered User beezee's Avatar
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    My tach would not work until I installed the 8920 tach adapter for electronic ignition

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    Well...I'm still a little confused about this.
    I had the e12-80 working and the tach working just fine.
    Now the tach wire (black/white) that was hooked to the + Coil is now hooked to the Red switched power for the MSD box. Now.....couldn't I just find another switched 12v to power the MSD and hook that black/white back up to the coil + and get my tach back?

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