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Discussion Starter · #1 ·
I am trying to install a scott drake repo rally pak in my 66 its not working I have pertronics could this be the problem?
 

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Yes it think it could if you have the Pertronixs II system installed. Below is a link that could be helpful.

Link
 

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Most electical tachs want to see one pulse per rotation. If you have a multi spark box, of some other device like a Pertronix II that modifies the spark, it could be a problem. If you have a PII, it might be a good idea to call Pertronix to see if they have a solution. I have a Sun mini-tach and it is fine with my P1, but when I was running a Jacobs ProStreet spark box, the tach was all over the place.
 

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I have a Petronix and the SD Rally Pac and am having no issues with the tach (the clock is having problems but it's mechanical in nature and not influenced by the Petronix).
 
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