Karl wrote,
>Jarrid
>
>Thanks for the information re coils the Pertronix and the need for a
ballast
>resistor on my Series V. I recieved the pertronix today (Thanks Curt). The
>litrature with it says that the coil should have a resistance of at least 3
>ohms . My coil is non original and by my meter has a resistance of about
3.6
>Ohms. I therefore installed it without a ballast resistor. As every one has
>said very easy installation and I think it does run better. However one
tiny
>glitch- will start well from rest but if I attempt to re-start it soon
(less
>than 1 min) after switch off it behaves like the battery is flat ie very
>laboured starter motor turn over for first few turns then fires ok. Leave
it
>for a minute after switch of and it restarts sweetly. What gives? Battery
is
>new. Earth strap ok
>
>Is this a symptom of low voltage or do still I need an external ballast
>resistor.
>
>
>Thanks
>Karl
The 3.6 ohms on your coil does not mean that it has an internal ballast.
Not sure what the nominal coil resistance is though.
You may very well have an internal ballast coil, I dont think it matters
though because pertronics wants a ballast anyway.
You probably want a ballast too, as it gives better starts by giving
full battery voltage to the coil during starting (if wired as such).
I would get the propper non-ballast coil, and install the ballast resistor
anyway.
The pertronics unit runs off the coil side of the ballast, and looks to me
that it ought to be wired as such (with ballast).
I doubt that your hot starting problem is becuase you dont have the ballast.
More likely is that your ignition is over advanced, or you are puddling
from your carbs into the intake for a minute, which can make for pretty
hard starting.
The inclusion of the ballast is key for longevity of the pertronics,
as it is known that the pertronics will run for some time without the
ballast. Without the ballast, the peak coil currents are too high,
which slowly, or quickly robs the life from transistor that is used
to switch the coil current.
More current is more heat, and heat kills.
Jarrid Gross
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