Question about charging systems... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BLACK AND BLUE 67-72 · 12-14-2003, 01:04 PM

Sounds more like a starter problem to me, the alternator will drop off after charging for a while, if it charged at 14.5 volts constantly then it would overcharge the battery! Mine has a new alternator w/internal regulator, and a new battery, and it will charge at 14.5 when first started and it gradually drops off as it runs, dropping to around 12.5 volts. I have headers on my truck and I have never had a problem with starting or having a battery go dead with it charging in this way.

12-14-2003, 01:04 PM	#7
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Sounds more like a starter problem to me, the alternator will drop off after charging for a while, if it charged at 14.5 volts constantly then it would overcharge the battery! Mine has a new alternator w/internal regulator, and a new battery, and it will charge at 14.5 when first started and it gradually drops off as it runs, dropping to around 12.5 volts. I have headers on my truck and I have never had a problem with starting or having a battery go dead with it charging in this way. __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA

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