I did a lot of fiddling with ballast resistors on LeRoar and did find they made a difference. The issue with them is with overheating of the coil. You can easily run without any resistor and get a hotter spark but after awhile it may begin to overheat and the engine will sputter/die. I have a number of ballast resistors I have used. I actually have two mounted side by side on the firewall so I can switch for racing or cruising. There is a minimal difference but under severe conditions it can matter. My stock one measured .8 ohms. I use that for street driving and it actually works OK for racing. Summit had a 1 ohm and a 1.5 ohm is what came with the Mopar electronic ign as I recall. I did buy a .25 ohm from the Mopar dealer and that is my racing set-up. I can easily bypass the resistor but if i chug around too much the coil heats fairly fast and fails. So I'd say you can
easily run with the resistor by-passed but if it cuts out then you have to put a resistor back in the mix. You can use the by-pass to see if the resistor is an issue without any harm to the system though. That's my opinion :-)
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Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies --
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