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ballast by-pass?

Unread postby rjsdotorg on Thu Feb 15, 2018 10:04 am

The new CRT dizzy calls for bypassing the ballast of course.
Upon inspection, it appears that the + side of the electric choke heater is connected to the high side of the ballast and so I could pull full V off of that.
Does that sound right?
1971 413-1 in a 270.

The install diagram for the CRT does not show a ground wire to chassis, so I assume it grounds through the dizzy as per stock.
IMG_5376.JPG


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rjsdotorg
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Re: ballast by-pass?

Unread postby 77Travco on Thu Feb 15, 2018 1:57 pm

Yes, that sounds like it will work as long as the "keyed hot" to the choke circuit is in good shape and able to handle the load of the ignition in addition the choke. You may want to check the fuse size of that circuit just in case.
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Re: ballast by-pass?

Unread postby rjsdotorg on Thu Feb 15, 2018 4:58 pm

I intend to check grounds' condition soon, as they probably need a cleaning as well.

Since the OEM coil comes off of the other side of the ballast, it should be the same fuse/wire supply (?).
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Re: ballast by-pass?

Unread postby 77Travco on Fri Feb 16, 2018 8:27 am

Checking grounds is a good idea. Don't forget big grounds from engine to chassis and from chassis to engine battery.
Yes, just follow the wiring diagram in your picture.
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