What is the and what purpose does it serve?

[rexus31]

I'm having a brain fart moment. What is the part below and what does it do? It was mounted to the coil bracket and connected to the negative post on the coil.



I'm converting to a Pertronix Ignitor Ignition Module and Flame Thrower Coil and was curious what purpose it served and if I need to reinstall.

 

[70bigblockdodge]

Its a condenser/capacitor for radio noose suppression.

 

[rexus31]

Its a condenser/capacitor for radio noose suppression.

Thanks! I'll reinstall.

 

[68plymouth383]

Dave spotted it, and called it out.

 

[53ryder]

So what's a radio noose? Am asking 'cuz I don't know.

Glenn

 

[70bigblockdodge]

Sorry noise.

 

[commando1]

I'm having a brain fart moment. What is the part below and what does it do? It was mounted to the coil bracket and connected to the negative post on the coil.



I'm converting to a Pertronix Ignitor Ignition Module and Flame Thrower Coil and was curious what purpose it served and if I need to reinstall.

You don't need it anymore especially with today's radio interference suppression plug wires. But I know you car needs it for authenticity.

 

[Big_John]

There's a few types of radio interference. There's the crackling noise that you hear in your radio. That's a high voltage interference from the spark plugs or plug wires. The use of resistor plugs and/or plug wires combats this interference.

If you hear a ticking type noise, that's that low voltage side of your ignition and that's what that capacitor hooked to the coil (the one in question) should help suppress.

There's also a whirring noise that's usually from the alternator (or generator in earlier cars).

You mostly hear the interference on AM radio, but sometimes you can get interference on the FM band or in amplifiers and speakers.

 

[commando1]

Amazing....

 

[BillGrissom]

I don't think you want to connect it to coil- since that would counter the on/off switching your "ignition" system is doing, and perhaps weaken your spark. I think it should be on coil+. As mentioned, the purpose of the condenser (capacitor) is to smooth the spikes put on the 12 V supply from the sparking. I didn't find it even mentioned in my 1965 Newport FSM or in the wiring diagrams. Search on the web since same deal for most cars. A modern radio certainly has supply filters and you can buy separate ones from audio stores.

 

[rexus31]

Any downside to installing it on the positive side of the Flame Thrower Coil using a Pertronix Ignitor Module?

 

[BillGrissom]

No downside, as long as the condenser is working and not shorting internally to ground. It is just a capacitor. It is more important to have if you still have a ballast resistor since it provides a "surge tank" after the ballast. The original Pertronix Ignitor still requires a ballast. The Ignitor II or III doesn't.

 

[rexus31]

No downside, as long as the condenser is working and not shorting internally to ground. It is just a capacitor. It is more important to have if you still have a ballast resistor since it provides a "surge tank" after the ballast. The original Pertronix Ignitor still requires a ballast. The Ignitor II or III doesn't.

Thanks Bill. I'l be running the Ignitor.