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Mod | | | Forums66 Topics128,048 Posts1,055,666 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | For some reason, when GM went to 12v, a resistor (called a ballast resistor) that reduced the voltage to about 9v (I think) was required in-line on the power lead into the coil. Some coils came with the resistor built in. Some (maybe all) of the Petronix Flamethrower coils have high resistance and no ballast resistor is needed. If regular 12v points were used without the resistance, the points would burn out in a very short time. http://www.google.com/search?q=ball...ved=0CDUQ_AUoAQ&biw=1024&bih=644 | | |
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