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| | | Forums66 Topics128,026 Posts1,055,409 Members48,422 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: May 2007 Posts: 112 Shop Shark | | Shop Shark Joined: May 2007 Posts: 112 | Hi guys. Is there any way to increase the voltage without to change the diameter of the alternator pulley ? I note that in "ralenty" the alternator just give me 13V, obviously more speed, more voltage. I have the old style external regulator. The alternator is a delco remy 12v. Is there different pulleys diameters? thanks Alfonso | | | | | Joined: Feb 2004 Posts: 29,748 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,748 | Speed doesn't have a lot to do with voltage, once the alternator is turning fast enough to develop any charge current at all. Under the cover on the regulator, there will be two coils of wire, with contact points attached to them. One is simply a relay- - - - -don't fool with that one. The other coil will have a set of points held closed by a spring, and the spring mount has a Phillips screw for voltage adjustment. GENTLY tighten the screw (clockwise) to increase the voltage, and put the cover back on temporarily so you get an accurate reading. DO NOT allow the cover to come into contact with any of the internal workings of the regulator or it will be smoke time. When the voltage adjustment is correct, the voltmeter should read 14.5 to 14.7 volts with the alternator charging against a fully-charged battery. Be sure the battery is charged up all the way before making any regulator adjustments. Jerry
Last edited by Hotrod Lincoln; 01/25/2010 8:19 PM.
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
| | | | | Joined: May 2007 Posts: 112 Shop Shark | | Shop Shark Joined: May 2007 Posts: 112 | Thanks Jerry, very helpful!! Alfonso | | |
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