Anyone with intimate knowledge of alternators, please clicky. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Cat Fuzz · 01-12-2004, 08:20 PM

Why the heck would the current output fluctuate? How do I remove the rotor from the case? Looks like there a little retainer, but how the heck do I get a wrench on the bolts? Is this all I need to convert an internal regulator alt to 105 amps? If I do this upgrade will that effect my factory amp gauge?

Oh, and whats the big deal about one-wire alternators?

*1972C10* · 01-12-2004, 09:34 PM

Jc whitney sells a similar kit to convert to 105 amp called the iceberg or something pretty good kit Goes in pretty easy not too difficult one wire alternators are ok i guess i just hook up in the internal how there supposed to be one wire to the charge post and one to ign keyswitch thats not the same circuit as the distributor.

walker · 01-12-2004, 09:59 PM

Well, I don't know how much that kit is, but a new int reg alt is about $30 from any parts store. You could probobly find the directions for a conversion with a search on the BB. I have not done this conversion, but have done some 6v to 12v conversions and have found the delco 10si alt to be a little more responsive at lower rpm. The single wire alt needs higher rpm's to self excite, and since I was doing lower rpm engines I opted for the 10si.
As far as getting the rotor out, again I have only done the three wire alt, it seems that when I removed the pulley and split the case everything just comes out. Hope this helps some, but it has been some time since I rebuilt one.

Cat Fuzz · 01-12-2004, 10:18 PM

Well, I called a local auto electric specialty shop and the guy told me that there is probably something wrong with my external regulated alt that is causing the current fluctuations. He also said that Schucks bench tester wouldn't be able to detect this defect.

I also found out that pretty much all you need to upgrade the output of an alternator is to replace the stator. Easy enough, but these guys want to sell me complete rebuilt units. So I guess I may order the kit. Seems cheaper than buying a upgraded rebuilt.

01-12-2004, 08:20 PM	#1
Cat Fuzz My son, my joy. Join Date: Sep 2003 Location: Spokane WA Posts: 463	Anyone with intimate knowledge of alternators, please clicky. Why the heck would the current output fluctuate? How do I remove the rotor from the case? Looks like there a little retainer, but how the heck do I get a wrench on the bolts? Is this all I need to convert an internal regulator alt to 105 amps? If I do this upgrade will that effect my factory amp gauge? Oh, and whats the big deal about one-wire alternators? Last edited by Cat Fuzz; 01-12-2004 at 08:23 PM.

01-12-2004, 09:59 PM	#3
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	Well, I don't know how much that kit is, but a new int reg alt is about $30 from any parts store. You could probobly find the directions for a conversion with a search on the BB. I have not done this conversion, but have done some 6v to 12v conversions and have found the delco 10si alt to be a little more responsive at lower rpm. The single wire alt needs higher rpm's to self excite, and since I was doing lower rpm engines I opted for the 10si. As far as getting the rotor out, again I have only done the three wire alt, it seems that when I removed the pulley and split the case everything just comes out. Hope this helps some, but it has been some time since I rebuilt one. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold

01-12-2004, 09:34 PM	#2
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	Jc whitney sells a similar kit to convert to 105 amp called the iceberg or something pretty good kit Goes in pretty easy not too difficult one wire alternators are ok i guess i just hook up in the internal how there supposed to be one wire to the charge post and one to ign keyswitch thats not the same circuit as the distributor.

01-12-2004, 10:18 PM	#4
Cat Fuzz My son, my joy. Join Date: Sep 2003 Location: Spokane WA Posts: 463	Well, I called a local auto electric specialty shop and the guy told me that there is probably something wrong with my external regulated alt that is causing the current fluctuations. He also said that Schucks bench tester wouldn't be able to detect this defect. I also found out that pretty much all you need to upgrade the output of an alternator is to replace the stator. Easy enough, but these guys want to sell me complete rebuilt units. So I guess I may order the kit. Seems cheaper than buying a upgraded rebuilt.



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