News:

  • Home
  • Help
  • Chat
  • Login
  • Register

    • « previous next »
    Pages: [1]

    Author Topic: Electronic ignition / Tach  (Read 1792 times)

    Offline BadJoey

    • Full Member
    • ***
    • Posts: 982
    Electronic ignition / Tach
    « on: July 28, 2015 - 07:29:48 PM »
    I changed from points to electronic ignition will that affect my tach readings ( rally dash ) . According to my friends timing light ,has tach built in , My rpm's on light is 750 , inside tach is 1200 .Any thoughts ? As always Thank You.
    Logged


    Offline tman

    • Sr. Member
    • ****
    • Posts: 1331
    Re: Electronic ignition / Tach
    « Reply #1 on: July 28, 2015 - 08:20:38 PM »
    I would hook up a 3rd tach to confirm.  Also depends on the ignition system you got.  You did not mention what electronic system you installed.
    Logged

    Offline JoeGrapes

    • Full Member
    • ***
    • Posts: 508
    Re: Electronic ignition / Tach
    « Reply #2 on: July 28, 2015 - 09:14:08 PM »
    It shouldn't. With either ignition the tach is connected to the negative side of the coil. I agree this calls for a 3rd opinion. Either your tach or timing light is wrong.
    Logged

    Offline JoeGrapes

    • Full Member
    • ***
    • Posts: 508
    Re: Electronic ignition / Tach
    « Reply #3 on: July 28, 2015 - 09:19:20 PM »
    Oh sorry, I was assuming you were using a Mopar Electronic Ignition. If you are using an MSD ignition then you need a tach adaptor from MSD to get the factory tach to read right.
    Logged

    Offline BadJoey

    • Full Member
    • ***
    • Posts: 982
    Re: Electronic ignition / Tach
    « Reply #4 on: July 29, 2015 - 11:17:02 AM »
    Mopar electronic ignition . I'm thinking the car tach is off . Thanks guys
    Logged

    Offline HP_Cuda

    • Hit the skinny little pedal on the right!
    • Sr. Resident
    • ******
    • Posts: 5268
    • Mopar or No Car!
    Re: Electronic ignition / Tach
    « Reply #5 on: July 29, 2015 - 12:49:12 PM »

    You will find that some tach's don't work well with certain electronic ignitions and require an adaptor to make it more accurate. Check your manufacturer and they will probably have a tech note on it.

    My last tach was this way and I pitched it, it was an Autometer tach.
    Logged
    1970 Cuda Clone 440 4 speed - sublime green
    1970 Cuda 383 4 speed - yellow - SOLD

    Offline Cardude

    • Newbie
    • *
    • Posts: 2
    Re: Electronic ignition / Tach
    « Reply #6 on: August 31, 2015 - 04:33:03 PM »
    Most '60s tachs won't work with modern electronic ignition, mine wouldn't work after I got rid of my points distributor so I sent it to AutoInstruments for a tach conversion and now it works perfectly.
    Logged
    Pages: [1]
    « previous next »