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the911Tprocess's Avatar
 
Join Date: Oct 2003
Location: Toronto
Posts: 161
voltage regulator how do you know

Hi All,
How do you know what alternator you have so that you can buy the right voltage regulator.

I have a 72 T 2.4. I think I have a 55 amp alternator which should make it a motorola, I think. I need to purchase a voltage regulator. The one I have is a black plastic covered version. I think I need to buy a bosch regulatory but need feed back to know.

Any thoughts to make sure I purchase the right one.

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Mark
911 T 1972 Black almost done!
Old 08-11-2011, 10:23 AM
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86 911 Targa's Avatar
 
Join Date: Jun 2009
Location: Manhattan Beach, California. Factory Delivery-Original owner-Retired engineer
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Quote:
Originally Posted by the911Tprocess View Post
Hi All,
How do you know what alternator you have so that you can buy the right voltage regulator.

I have a 72 T 2.4. I think I have a 55 amp alternator which should make it a motorola, I think. I need to purchase a voltage regulator. The one I have is a black plastic covered version. I think I need to buy a bosch regulatory but need feed back to know.

Any thoughts to make sure I purchase the right one.
Your local re-build shop should be able to help you out.

Good luck,

Gerry
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1986 911 Targa.
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Old 08-11-2011, 11:25 AM
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Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
Quote:
Originally Posted by the911Tprocess View Post
Hi All,
How do you know what alternator you have so that you can buy the right voltage regulator.

I have a 72 T 2.4. I think I have a 55 amp alternator which should make it a motorola, I think. I need to purchase a voltage regulator. The one I have is a black plastic covered version. I think I need to buy a bosch regulatory but need feed back to know.

Any thoughts to make sure I purchase the right one.
Mark,

You need the Bosch (mechanical) regulator to match the OEM alternator. This sits on the left side panel in the engine compartment.
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Rennsport Systems
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Old 08-11-2011, 11:29 AM
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Join Date: Oct 2003
Location: Toronto
Posts: 161
voltage regulator

Thanks Steve, for comfirming this.
I probably will need a rebuild of the alternator as well so I thought of replacing both alterntor and regulatory at the same time. I wanted to keep this combination.

I've read on Pelican that it is better to stay with separate regulatory/alternator combination rather than going to the more modern self contained regulatory in alternator combination.

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911 T 1972 Black almost done!
Old 08-11-2011, 11:57 AM
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