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Ford 9N, 2N & 8N Discussion Board

Re: 1948 8n-- no spark


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Posted by uh . . . Dell (WA) on August 22, 2006 at 18:08:02 from (172.190.160.116):

In Reply to: Re: 1948 8n-- no spark posted by Phil (NJ,Az,Sask) on August 22, 2006 at 14:07:03:

Yeah Phil.........3:1 thermal advantage and WEAK SPARKIES. You know better.

You know the "infamous ballast resistor" is nominally about 1.4 ohms at operating temperature. (it ranges from about 0.4 when really cold to about 1.7 when really hot) and when I went to school, 2.5 + 1.4 = 3.9. This means a reduced current flow in the coil primary winding and resultant WEAKER magnitic field to induce the high voltage secondary. Its all about electo-magnetic theory. Its AMPS that make magnetic fields.

Interesting that you claim the NAPA IC14-SB is a low rpm coil for 4-cyl Jeeps and 6-cyl Checker cabs (Continental Motors flathead six?, I can't remember). Does that mean that our recommended useage as a real 12-volt coil that uses NO RESISTOR on 2000-rpm 4-cyl N-Engines is outta specs?........respectfully, Dell


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