Reply to ""Hot" ignition switch?"

panteradougMember

quote:
Originally posted by PartTimeAdult:
quote:
Can I use one relay for the "hot" coming out of the switch, or do I need multiple relays for everything the ignition switch controls?

I say you must be careful; having all ignition on a relay can cause other problems. During cranking, voltage is low enough to not engage relays; if the spark box or even points are on this relayed circuit, it can inhibit ignition, often the engine will fire or fart as you let go of the start position.

Things like electric choke and alternator energize are ok to relay, as well as most accessory circuits, but not your ignition sources. (points, msd/duraspark nor distributor pickup), due to low voltage condition during cranking.

OK, I'm not arguing here but there was an earlier thread in which George Pence recommended putting the entire ignition on a 50amp continuose duty relay.

It is on my to do list but now is as good as any to discuss this.

Help!

3/13/074:57 AM

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