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How to test Tachs 67/68 Ford Mustang and Shelby?

Started by Kent, November 03, 2022, 03:59:51 PM

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Kent

I´m still thinking about how I can test my tachs here. I have a 65 Mustang here with no tach and would like to use this engine as the bench. So would it be ok to take a 1.5 ohm ballast resistor between and put it in line with the ignition switch to coil +

I read on some other forums that some people don't use a ballast resistor and only put the tach in line from ignition switch to coil +

Is there maybe a drawing or something how to do it right, thanks...
SAAC Member from Germany and Owner of a unrestored 1967 Shelby GT500, 1968 1/2 Cobra Jet´s and some nice Mustang Fastback´s 67/68

67350#1242

Even non tach cars have the resistor wire in line from ignition to coil.  You should be safe putting the tach in series with that circuit. 
67 GT350  SJ 02/01/67  Gray 4spd A/C
67 Coupe  SJ 11/16/66  White Auto A/C PDB

67 GT350

I have a diagram from Phil Severance for the Shelby tach for a 66, would you like that?
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Kent

I think that could help, you have my e mail from last week I think, thank you.
SAAC Member from Germany and Owner of a unrestored 1967 Shelby GT500, 1968 1/2 Cobra Jet´s and some nice Mustang Fastback´s 67/68

67 GT350

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