Rather than hijack Jackb's current thread on coils, I'll start a new one. I'm building a 1937 President straight 8 (250 cu in) engine for my Indy car replica. I had the generator rewound for 12 volts and the starter rebuilt. Now I'm ready for ignition components. The original Delco-Remy 662M distributor has dual points, but it's just a standard mechanical distributor otherwise. I need to pick a good coil, add a ballast resistor (I think), and mount a capacitor on the distributor. I'll use copper core wires as there won't be a radio. Engine redline is about 4200-4400 rpm. Except for instruments, lights, and electric radiator fan, there are no other electrical accessories. So,
Which coil do I use? Summit Racing lists 3,000 coils. I just want a good one with hot spark in a black case but without internal ballast resistor.
Which ballast resistor is needed? I think it should be about 1.3 ohms, but educate me. There is no "pink wire". I think it will start OK without bypassing the resistor when cranking.
What value condenser/capacitor is needed? I think 0.2-0.25 microfarads is the common one. Any reason for different values? I don't actually see microfarad values for ignition condensers on any sellers' websites, so maybe it doesn't make much difference as long as they are good for 400-600 volts. The differences seem to be in how they are mounted.
Which spark plugs to use? They need to be 18 mm threads, so that limits the choices. Originals were Champion 7-A or 13 for hard driving , 8-A for milder use.
Remember, this is supposed to look 1932-ish, so I don't want to go with electronic gizmos. And, I won't really be running in the Indy 500. I'm hoping to get close to 190-200 hp using four EX-23 carbs.
Which coil do I use? Summit Racing lists 3,000 coils. I just want a good one with hot spark in a black case but without internal ballast resistor.
Which ballast resistor is needed? I think it should be about 1.3 ohms, but educate me. There is no "pink wire". I think it will start OK without bypassing the resistor when cranking.
What value condenser/capacitor is needed? I think 0.2-0.25 microfarads is the common one. Any reason for different values? I don't actually see microfarad values for ignition condensers on any sellers' websites, so maybe it doesn't make much difference as long as they are good for 400-600 volts. The differences seem to be in how they are mounted.
Which spark plugs to use? They need to be 18 mm threads, so that limits the choices. Originals were Champion 7-A or 13 for hard driving , 8-A for milder use.
Remember, this is supposed to look 1932-ish, so I don't want to go with electronic gizmos. And, I won't really be running in the Indy 500. I'm hoping to get close to 190-200 hp using four EX-23 carbs.
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