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Old 08-23-2008, 11:09 AM   #11 (permalink)
roflwaffle
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Quote:
Originally Posted by MazdaMatt View Post
That's pretty solid. Just wondering... this no-alternator business has me a little skeptical... spark plugs are supposed to work with a 14v feed and you're only giving them 12... do you think maybe if you drop the alt you should re-gap your plugs? I would think the spark is much cooler and it should be adjusted.
The voltage depends on the inductance of the coil and the rate of change of the current, which should both be fixed and independent of the battery voltage up to a point, so I don't think using 12V instead of 14V would change the spark plugs that much since it only takes a few milliseconds for the battery to increase the magnetic field in the coil.

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