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Master disconnect switch wiring
Just popping in
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Hi Fella's, My 310 race car requires a 4 post master disconnect switch and I am unsure how wire it. How do I kill the "field" section of the alternator to guarantee total shut down of the entire electrical system?
Also what should I set the ignition advance to?
Engine is an A15, stock bottom end, big valve GX head, cam has 235dur@ .050, weber 40 DCOE carbs
Thanks for any help,
John D. (Mongo)

Posted on: 2015/6/6 14:14

Edited by mongoz30 on 2015/6/6 17:28:31
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Re: Master disconnect switch wiring
No life (a.k.a. DattoMaster)
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Run your charge wires from the alternator back to your battery or before your battery terminal switch. Otherwise your car will continue to run on the alternator even when the battery has been disconnected.

Posted on: 2015/6/6 17:57
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Re: Master disconnect switch wiring
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Quote:
Hi Fella's, My 310 race car requires a 4 post master disconnect switch and I am unsure how wire it. How do I kill the "field" section of the alternator to guarantee total shut down of the entire electrical system?
Use the stock alternator wiring. It has a separate F (Field) wire that is connected to the IGN circuit. Once you turn the key OFF, the alternator stops charging -- even if the engine is still spinning.

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As datsa73 mentioned, the A (Alternator) output should go to the battery, so that it doesn't connect to the IGN circuit.

Posted on: 2015/6/6 23:26
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Re: Master disconnect switch wiring
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Quote:
what should I set the ignition advance to?
Set it to 7 degrees BTDC

Got any pics of your FWD race car?

Posted on: 2015/6/6 23:34
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Re: Master disconnect switch wiring
Just popping in
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Thanks for the wiring tips!
I am looking for total advance setting ,using mechanical advance only. Vaccuum is disabled.
Pics are forthcoming, car will be finished this week.

Posted on: 2015/6/7 3:19
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Re: Master disconnect switch wiring
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Stock A15 was 30 degrees total, but I expect 34 degrees is better.

Posted on: 2015/6/7 3:41
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Re: Master disconnect switch wiring
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Thanks for info DD, problem solved!
Mongo

Posted on: 2015/6/9 13:24
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