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| Joined: | 09-17-2007 |
| Location: | San Francisco, California USA |
| Posts: | 221 |
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The ballast resistor is designed to take a 1.5 ohm coil and bring it up to 3 ohms. It protects the points.
If you go away from the points into a Petronix, you can leave the ballast resistor out. Then you would look for either a 1.5 ohm or a very low resistance, like a .5 ohm high performance coil.
If you keep the points and the ballast then yes, 1.5ohm.
There are so many brands out there including stuff from Bosch (blue coils) and the Lucas Sport series, the most important thing is to look at the resistance and get it where you need it.
Other than that I have tried many different brands and found no real difference. Some coils are now oil filled as opposed to solid, which supposedly adds to their performance and durability.
It's possible to find a Lucas Gold that is around 1.5 ohms, oil filled, and advertised as high performance, but again I have a box of 3-4 different versions and can't tell any difference.
The stock system draws amperage through the tach circuit, so it's crude to say the least- not much to do in terms of "high performance" there.