Ballast resistance question
Thread Starter
Racer
Joined: Dec 2005
Posts: 344
Likes: 0
From: Washington DC
Ballast resistance question
I am in the process of installing a Crane XR-i electronic points replacement kit and the first thing it says when I read the directions is that I have to verify the ballast resistance. I do not have a volt-ohm meter and am curious if this is something I really need to check. I do have an Accel Super Stock (#8140) on there. Would the car run properly if the resistance was wrong? Something I should worry about?
Tech Contributor
Joined: Aug 1999
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From: At my Bar drinking and wrenching in Lafayette Colorado
The resistance in your resistor wire (integral with your harness) is 1.3 ohms. This will drop the voltage to your coil to about 7 volts when running. You need to bypass this resistance when using a Crane system - it runs on a full 12 volts in order to get the maximum benefit from the system.
Burning Brakes
Joined: Jun 2002
Posts: 837
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From: Texas
Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
Originally Posted by lars
The resistance in your resistor wire (integral with your harness) is 1.3 ohms. This will drop the voltage to your coil to about 7 volts when running. You need to bypass this resistance when using a Crane system - it runs on a full 12 volts in order to get the maximum benefit from the system.
Had the same issue with my MSD distributor. I ran a hot from my ignition switch to the + on coil. Works Great!!! EDIT!!!! CHECKED the above website and your system looks like it does require ballast resistance. Mine didn't
Last edited by 63mako; Feb 25, 2006 at 11:56 PM.
Thread Starter
Racer
Joined: Dec 2005
Posts: 344
Likes: 0
From: Washington DC
I finally found the internal resistance in the Accel coil on their faq site. It has 1.2 ohms, which is what Crane suggests is the minimum. So, I hooked one wire to each side of the coil and everything seems to be fine.
Burning Brakes
Joined: Jun 2002
Posts: 837
Likes: 3
From: Texas
So.....with the engine running....how many volts are you showing at the + side of the coil?
Edit. ....Sorry, just re-read your first post and see you don't have a volt meter.
Edit. ....Sorry, just re-read your first post and see you don't have a volt meter.
Last edited by goinbroke; Feb 26, 2006 at 11:26 AM.
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