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DELCO 12v GENERATOR


 
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steve19438
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Joined: 30 May 2011
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Location: harleysville pa

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PostPosted: Tue Dec 26, 2017 8:46 am    Post subject: DELCO 12v GENERATOR Reply to specific post Reply with quote

anyone know at what RPM these start to charge the system ?
 
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Steve@Advance
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PostPosted: Tue Dec 26, 2017 11:09 am    Post subject: Re: DELCO 12v GENERATOR Reply to specific post Reply with quote

From memory and finding some info, I'm saying around 1800 RPM (at the generator) is where they make enough to close the cut out relay.

Need to do some measuring, but typically the crank pulley is 2x the gen pulley diameter, so around 900 engine RPM is needed to start the charging process.

For whatever reason, the older, slower turning engines used larger generator pulleys. All I can reason was to increase belt life. If you can find a smaller diameter gen pulley that is compatible with wide belt, that will get the gen spinning faster, but will throw the tach a little fast.

I would think a properly functioning generator, regulator, healthy battery, should work though.They did back in the day. I think most problems are cumulative, especially with the "trailer queens" that see a lot of storage, starts and stops, idling... But starting out with a fully charged battery (think battery tender) should see it through most any situation.

Sorry, this is long, off today, battling cabin fever! LOL
 
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steve19438
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Location: harleysville pa

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PostPosted: Tue Dec 26, 2017 11:26 am    Post subject: Re: DELCO 12v GENERATOR Reply to specific post Reply with quote

thanks. i started all five of my 35's today. also battling cabin fever.
 
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Mule Meat
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PostPosted: Sat Dec 30, 2017 9:37 am    Post subject: Re: DELCO 12v GENERATOR Reply to specific post Reply with quote

If it is a Delco 10SI (low RPM) type alternator it should excite at about 12-1300 rpm.
 
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