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starting engine

steve from staten island

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i wanted to test run my engine before i installed it. As far as the distributor,I'm running points so can i put 12 volts to the positive side of the coil? Do i need a ballast resistor?----Thanks
 
Answer to question 1: Yes, but things won't last long that way.
Answer to question 2: Yes, use a ballast resistor with points.

Not using a ballast with points causes points to conduct excessive current. When they open, this then puts electrical stress on points and condensor. As well, the coil heats up and can die. It will run, but, for how long is the question. Many cars had a means of shorting the ballast only during starting. Upon releasing the key, the ballast was placed back in circuit. This gave a hot spark for start and long life.

What at most people don't realize is that running without a ballast causes the coil to attempt to allow an "infinite" amount of current to flow. The only limiting factors are wiring, switch, coil and battery internal resistances. This can stress the whole circuit. Ignitor II and similar systems are designed to limit current (i.e.: to ~8A) and, thus; do not need a ballast in series with the coil.
 
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