Coils

[Willacy70]

HI everyone, i was bored that other night so i started researching coils and read a few diffenet things. Currently my car (4ac powered) has a Bosch GT40 coil in it. I've read around that this coil is suitable for cars with electronic ignition, something my car doesnt have and that a GT40R is a better coil for the job. Recently i've had a few issues with my car that may be ignition related. So i guess i have two questions. 1. What is the difference between the two coils, 2, Which coil should i have on my car. thanks guys

[Medicine_Man]

GT40 - Electronic Ignition

GT40R - Use with ballast resistor (To stop the points burning out)

[GJM85]

Some electronic distributors use ballast resistors as well. To prolong the life of the ignition leads.

[Willacy70]

GT40 - Electronic Ignition

GT40R - Use with ballast resistor (To stop the points burning out)

 

Thanks, car has a GT40 in it now so ill chuck a GT40R in it and see what difference it make. Will probably change the points while I'm at it.

 

Some electronic distributors use ballast resistors as well. To prolong the life of the ignition leads.

 

I have looked around the internet at pictures of ae71's and other 4AC powered cars. The coil setup on all these cars incorporates a the ballast resistor. I have noticed that the setup on my car is different. As it is a ke70 it didn't come out with a 4AC so who ever did the conversion had different ideas with the coil setup. Tomorrow I'll post a picture of what I'm talking about. Although the setup doesn't have a ballast resistor, it seems like the system incorporates two separate condensers.

[Willacy70]

Here is the setup on my car.

 

 

As stated it has a GT40 coil, and no ballast resistor to speak of. If lack of this resistor causes the points to burn out, I think I might get new points. Would it be safe to put a GT40R coil in instead?

Edited July 16, 2013 by Willacy70