Hot coil

sdibbers

Well-Known Member
Hi All,

I've had a few problems with ignition componants over the last year on my NADA 2000TC. One of which is the coils have over heated. My old Pertronix FlameThrower coil died this May, I replaced it with an Accuspark one I had on the shelf in the garage. Sure enough it started missing when accelerating at motorway speeds. When I got home I felt the coil and it was almost too hot to touch. Not trusting a Chinese oil filled coil I have splashed out on a Bosch 3 ohm coil (Ballast resistor is missing on my car, hence the internal resistor coil). The new coil is epoxy filled, so doesn't have the issues that oil filled coils have of leaking or not providing consistent cooling.

The new coil is still getting hot at highway speeds. It's running fine, but it's still warmer than I remember coils getting. Any thoughts as to possible causes?

Set up as follows:

Electronic ignition module is a Lumenition Magnetronic
Coil Bosch 12v 3ohm

Other thought is maybe too much charge from the alternator. Car is a a former AC car so has an AC11 alternator with external regulator. At idle I get about 13.5v at 2500+rpm it levels out at 14.5v. Does this sound right?

Sorry for the wall of words!

Best,

Steven
 
The voltages you quote are correct, so I think you can rule out the alternator as a source of trouble.
Thanks Pete. I guess it could also be it was a pretty warm day when it happened. I have to say modern ignition components really lack quality. According to the research I'm doing it seems that only the Brazilian made coils are any good from Bosch. the Mexican ones are as bad as the Chinese stuff now.
 
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