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Thread: Sprint tach with EFI

  1. #1
    Join Date
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    Sprint tach with EFI

    Has anyone had any success installing an original 1963 tachometer with a modern EFI computer motor?
    I've had the tach restored and re calibrate for a V-8 and I have to have it in my car. Problem I have a tach signal wire from my coil but the tach doesn't wire up that way, so I need to figure out how to make it work.
    Anyone.......

    Tach has three wire: green, red, black. Signal wire from the coil is green. Common sense says, green to green, black to ground and red to power. NOT. I've read somewhere about a filter to correct the signal but now I can't find the info. HELP.
    Last edited by doghows; May 19th, 2014 at 08:14 PM.
    63 Sedan Delivery
    5.0 HO EFI AOD 8" rear

  2. #2
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    Well research is showing me I'm screwed. Appears the the Falcon is one of the only cars to use this type tach. The wiring goes from the key to the tach then off to the coil. Thus making it a positive hookup compared to all the other tachs in the world that use a negative coil side for the tach signal.
    Crap $450 down the toilet, guess I'll have to list it for sale.
    63 Sedan Delivery
    5.0 HO EFI AOD 8" rear

  3. #3
    You'll have to send that restored tach to me.

    I'll send you my working non restored tach that you can then send out and have restored withnmodern parts
    Nathan and Jen Cooper
    63 Sprint Hardtop "Dollora"
    63 Super deluxe squire wagon "Mayble"
    * this spot is vacant for future project*

  4. #4
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    If it comes down to that well talk.
    63 Sedan Delivery
    5.0 HO EFI AOD 8" rear

  5. #5
    Quote Originally Posted by doghows View Post
    Well research is showing me I'm screwed. Appears the the Falcon is one of the only cars to use this type tach. The wiring goes from the key to the tach then off to the coil. Thus making it a positive hookup compared to all the other tachs in the world that use a negative coil side for the tach signal.
    Crap $450 down the toilet, guess I'll have to list it for sale.
    This is how I mentioned it was supposed to work, but I wouldn't consider it down the toilet - you'll sell it for that. I have a repop version I won at the meeting raffle in January or March, I'll swap you.

    Have you contacted the restorers? Can they modify?
    Roger Moore

    63 "Flarechero"
    powered by: 347ci stroker | Tremec T5 | 8" 3:45 TracLoc rear



  6. #6
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    Post up a picture. I don't care if it's an original,I just want the vintage look in my car. You saw how cool that tach looked in the car, it has to be done.

    They probably could but I don't want to invest another 2-3 hundred in a $4-5 hundred dollar tach!! Holy crap did I just say 2-3 & 4-5 hundred what am I thinking.


    P.s. The sender did the trick. Temp gauge working!
    Last edited by doghows; May 19th, 2014 at 10:32 PM.
    63 Sedan Delivery
    5.0 HO EFI AOD 8" rear

  7. #7
    Find a $100 vintage looking sun pro.. I saw a nib one listed on evil pay yesterday.

    Moon eyes makes a sun pro knock off.

    Autometer sells vintage repops last time I looked they had something similar to the sprint tach but it was $250..
    Nathan and Jen Cooper
    63 Sprint Hardtop "Dollora"
    63 Super deluxe squire wagon "Mayble"
    * this spot is vacant for future project*

  8. #8
    I've never even taken the one I have out of the box yet. It, as I recall, has the Sprint logo etc but how much from there it deviates, I don't recall at the moment.

    I have DSII is both cars now, so I'm not sure if even I could use it, or the original. The original, as I mentioned when looking at it on Sunday, is connected in-line with the ignition somehow (have not seen the schematic, so not 100% where and how) but was told if the tach fails - you are F.O.R.D.

    Good to know the temp gauge works now. Too bad it didn't, by some miracle, fix the 42 MPH thing too.
    Roger Moore

    63 "Flarechero"
    powered by: 347ci stroker | Tremec T5 | 8" 3:45 TracLoc rear



  9. #9
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    Like this one?
    Attached Images Attached Images
    63 Sedan Delivery
    5.0 HO EFI AOD 8" rear

  10. #10
    Interesting. So it must be picking up the minuscule changes in current to the coil every time the the coil goes through a charge/discharge cycle. That is showing wired between the Ignition and Pink (resistance) wire on the stock ignition.
    Roger Moore

    63 "Flarechero"
    powered by: 347ci stroker | Tremec T5 | 8" 3:45 TracLoc rear



  11. #11
    Steve

    How about this auto gage tach?

    Probably not vintage enough..
    Attached Images Attached Images
    Nathan and Jen Cooper
    63 Sprint Hardtop "Dollora"
    63 Super deluxe squire wagon "Mayble"
    * this spot is vacant for future project*

  12. #12
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    Thanks Nathan. I haven't given up completely yet. The guy that rebuilt my tach won't call me back so I have a call into Ron Francis. That is the wiring harness I used so maybe they can help.
    If not I'm still waiting for a picture of Rogers repop unit. If worse come to worse ill work you a deal for you defunct unit and send it in to work with my junk? I don't know I'm stuck on that original one. Just too cool.
    63 Sedan Delivery
    5.0 HO EFI AOD 8" rear

  13. #13
    Steve,

    I have a working non restored sprint tach.. its in my sprint..

    I cant find the website anymore but there was a company that restored them with modern internals. That was the route I was going to go but as of right now I dont need to, as it works although sometimse not correctly.

    I just threw out the auto gage as it just sits in its box in the garage.

    Best of luck..

    Why cant you just tap into the positive coil feed add a resistor and make it work?

    Never mind you'd probably have to loop the power back to the coil..

    You could sell it on craigslist for $495 like the guy in Portland is.
    Last edited by Nathan289; May 20th, 2014 at 04:57 PM.
    Nathan and Jen Cooper
    63 Sprint Hardtop "Dollora"
    63 Super deluxe squire wagon "Mayble"
    * this spot is vacant for future project*

  14. #14
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    So I finally got some answers and it came from another shop that rebuilds vintage tachs and so forth. He said the tach will not work in any way shape or form in its current state. He can however rebuild the inside with solid state components to make it work with all more normal ignition systems.
    Another $275. Now do I do it or keep shopping?
    63 Sedan Delivery
    5.0 HO EFI AOD 8" rear

  15. #15
    Go look at autometer's website and price them out..

    I bet you'll send off that sprint tach

    Sorry dude..

    Old cars suck......... . The money out of your wallet that is...
    Nathan and Jen Cooper
    63 Sprint Hardtop "Dollora"
    63 Super deluxe squire wagon "Mayble"
    * this spot is vacant for future project*

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