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Ford 9N, 2N & 8N Discussion Forum
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Hey Dell

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OH Boy

12-27-2005 17:47:57




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What would happen if a guy wired in a switch to bypass that resistor for better starting. Flip the switch for say 30 seconds or a minute at startup, then turn it off? Would it make the spark any hotter than we are already getting with a 'cold' resistor? Just curious.




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DavidO

12-28-2005 02:48:21




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 Re: Hey Dell in reply to OH Boy, 12-27-2005 17:47:57  
Not a bad idea, but NOT a new idea either. Essentially, the "ballast resistor" does electrically what you are talking about. It does it well enough that I seriously doubt that installing a "bypass switch" would make any noticeable difference. All cars of the '40s, '50s, '60s, and early '70s used some sort of scheme to use full battery voltage for cranking and then reduce the current through the coil by putting some resistance in series with the coil after starting the engine. Ford and GM used "resistance" wire. Chrysler used a resistor mounted on the firewall. I still have some NOS rolls of the wire in the garage along with some 4 pole 6V solenoids. The 4th pole on the solenoid makes the current limited connection to the coil from the battery when the key switches from the start to the run position. It has worked quit well for many decades on many millions of vehicles, so, it WAS a good idea.

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OH Boy

12-28-2005 05:19:28




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 Re: Hey Dell in reply to DavidO, 12-28-2005 02:48:21  
Thats I guess what I am wondering, if installing something like this actually improve anything or does the ballast resistor already do it for us? When cold, does the ballast resistor have zero 'resistance'?



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DavidO

12-28-2005 08:49:36




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 Re: Hey Dell in reply to OH Boy, 12-28-2005 05:19:28  
Not absolute zero, but low enough that "zero" would not make a noticeable difference in the circuit when starting the tractor. It does the job for you. You should leave it alone. Look for a different problem and ask us some different questions. The "ballast resistor" is OK. Let's fix something that is broken.



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Bob

12-27-2005 22:18:54




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 Re: Hey Dell in reply to OH Boy, 12-27-2005 17:47:57  
My Uncle had a momentary pushbutton wired accros the ballast resistor on his front-mount 8N.
You could push the button to bypass the resistor, hopefully for more spark while cranking.

It DID seem to help cold weather starting some. Later, I coverted it to 12 Volts, and removed the switch.

Of course, applying full buttery voltage to the coil while starting (as was common with many other machines with breaker point ignition) could be made automatic by the use of a small relay operated by the voltage to the starter.

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