Re: Re: Positive ground..?!

Posted by MarkB on January 28, 2002 at 16:55:45 from (64.79.80.126):

In Reply to: Re: Positive ground..?! posted by Salmoneye on January 28, 2002 at 04:30:49:

> in theory, positive ground will make your sparkplugs
> last longer.

Yes, but the polarity of the spark plug is determined by the polarity of the coil, not the battery. Swap the leads of the coil and and you'll switch the polarity of the spark.

> The semi-conductor diodes in modern 12 volt alternators
> are very polarity sensitive and won't work with positive ground.

12 volt alternators are designed to work with negative ground, not the other way around. You could make a positive ground alternator (just reverse the diodes), but negative ground was standardized by the time alternators were in common use.

> Positive ground was (IMHO) Ford's Lawyers attempt
> to get around GM's patents on the Kettering Ignition System.

But weren't GM vehicles all positive ground as well?

Follow Ups:

• Re: Re: Re: Positive ground..?! uh . . . Dell (WA) 08:17:27 01/29/02 (2)
  • Re: Re: Re: Re: Positive ground..?! MarkB 20:04:48 01/29/02 (0)
  • Re: Re: Re: Re: Positive ground..?! Red Dave - Thanks Dell... 12:39:56 01/29/02 (0)
• Re: Re: Re: Positive ground..?! george md 21:57:52 01/28/02 (1)
  • Re: Re: Re: Re: Positive ground..?! Salmoneye 03:33:19 01/29/02 (0)

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