6 volt ignition coil

(quoted from post at 16:28:06 09/25/14) how many output volts on a stock naa 6 volt positive ground ignition coil should i have
our question is FAR too open-ended to answer. Under what conditions? Totally open circuit?, connected to a spark plug in the atmosphere?, to a plug in a cylinder with 120PSI?, at instant just before arc-over?, just after arc is established?, on, and on.
 
Your coil will put out as many volts as needed, UP TO A POINT. If it only needs 5K volts to fire, it will have an output of 5K volts. If you pull a plug wire and have a half-inch gap and 20K volts is needed, it will have an output of 20K volts, if it has the capability to do so. It all depends.
 
Depends on the turns ratio , applied voltage, dwell time and if switched by points or solid state.
What are you trying to make the coil jump?
 
Hopefully the HV secondary volts will rise high enough to arc jump current across the plugs gap, and sort of like JMOR posted, that depends upon:

The Gap distance (typical maybe 0.020 to 0.030 stock in an old tractor) ,,,,,,The Medium (fuel and compression) in which the plug fires.

Also, the voltage will only rise high enough so the arc occurs and no higher REGARDLESS if its a stOck coil or a so called after market HIGH VOLTAGE COIL

Sooooooooo we cant answer the question unless we have a ton more of information and then perform some serious math calculations. A typical old tractor coil may fire in the 5000 to 10,000 volt range, depending again, on plug gap and fuel and compression

Nuff said

John T
 
They usually are a waste, especially on a stock tractor. However, if the compression has been raised, the plug gap has been opened, the RPMs will be higher, a super expensive coil might be needed. I guess the original poster hasn't told us the reason why he asked this question.
 

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