Page 8 of 8 FirstFirst ... 45678
Results 106 to 108 of 108

Thread: Derek's Project GFP

  1. #106
    Join Date
    Jan 2010
    Location
    Bossier City, LA
    Posts
    2,224
    Look at your 89 tach; I don't think it HAS the CYL pin.

    But for 1991+ tachs, not in SCs, yes, you ground the CYL pin.

    What you might need to do, to keep the SC tach, is pickup a tach adapter, like this one (note: picked as a representative part, is NOT a recommendation for this unit!): http://www.allzim.com/store/tach-ada...e-adapter.html

    RwP

  2. #107
    Join Date
    Sep 2012
    Location
    Raleigh, North Carolina
    Posts
    666
    Quote Originally Posted by RalphP View Post
    Look at your 89 tach; I don't think it HAS the CYL pin.

    But for 1991+ tachs, not in SCs, yes, you ground the CYL pin.

    What you might need to do, to keep the SC tach, is pickup a tach adapter, like this one (note: picked as a representative part, is NOT a recommendation for this unit!): http://www.allzim.com/store/tach-ada...e-adapter.html

    RwP
    I already have this 92 lx tach. I just wanted to verify that if I tied the two pins I had circled, that it would make it an 8 cylinder tach.
    Any idiot can make a Mustang fast...
    It takes a special idiot to make a Thunderbird fast!!!
    89 SC 4.3 stroker 384rwhp 473ftlbs
    Best ET 13.085 Best MPH 106.6... got some work to do!
    2016 V6 M90 Dyno Champ 2016 Mod 1 Runner Up

  3. #108
    Join Date
    Sep 2012
    Location
    Raleigh, North Carolina
    Posts
    666
    Swapped out the tach out in the cluster tonight and took some pictures. I removed the original tach from the cluster and compared it to the new tach from a v6-v8 lx bird. Right away you can see the difference... the v6 v8 tach has an extra pin labeled CYL. My understanding is that you ground this pin to make the tach work in v8 mode. The 89 SC cluster has no connection for this pin, so you just ground the pin with a jumper on the back of the board. I trimmed the CYL pin down to make sure it didnt interfere (not sure if that is required or not, but I did it anyways). I also took a few minutes to swap the gauge face and the needle over. My needle was in better shape and the SC gauge face says Premium Unleaded Fuel Only instead of the v6-v8 tach that says Unleaded Fuel Only.

    Name:  TACH COMPARISON.jpg
Views: 21
Size:  247.0 KB

    Name:  CLUSTER.jpg
Views: 21
Size:  168.1 KB

    Name:  JUMPER.jpg
Views: 21
Size:  185.2 KB

    Ive got some work to do before I can start the car again and test it out to see if it works. But from what Ive read and now seeing the difference, it all makes sense.
    Any idiot can make a Mustang fast...
    It takes a special idiot to make a Thunderbird fast!!!
    89 SC 4.3 stroker 384rwhp 473ftlbs
    Best ET 13.085 Best MPH 106.6... got some work to do!
    2016 V6 M90 Dyno Champ 2016 Mod 1 Runner Up

Similar Threads

  1. Saturday Sept 21st motor swap project
    By V6Sprout in forum Super Coupe Club of Ontario
    Replies: 20
    Last Post: 09-20-2002, 12:11 AM
  2. project....
    By stephens89sc in forum Super Coupe Club of Western Canada
    Replies: 12
    Last Post: 09-13-2002, 12:49 AM
  3. Project "X" revealed!
    By ProjectX in forum Super Coupe Club of Ontario
    Replies: 14
    Last Post: 08-20-2002, 01:57 PM
  4. Project "Black Bettie" Status: The awakening is ne
    By Jason Parham in forum Super Coupe Club of the Southeast
    Replies: 2
    Last Post: 01-31-2002, 03:33 AM
  5. Project "Black Bettie" Status Report: 7/29/01
    By Jason Parham in forum Super Coupe Club of the Southeast
    Replies: 0
    Last Post: 07-29-2001, 10:56 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •