130A Alternator DIES every 2-3 months

nightmare95stang · 10-19-2007, 06:44 PM

I have a 1990 mustang pulley setup on my 95 mustang. I also have a supercharger drive crank pulley, 4 inch accessory and 8 inch blower drive.

I did a 331 stroker motor swap in May, and I bought a new 130A alternator for it, and it died 2 months later. I replaced it with a new one, and it just died again this past week (3 months later).

Does anyone have ANY insight on this? Are the electronics I am running a bit much where they would zap these new alternators so quickly???
-9 autometer gauges
-Flex-a-lite dual fans (set to go on at 180 degrees)
-MSD box
-basically stock fuel system with a 255 in-tank pump and a Vortech T-rex external pump
-42 lb injectors and matching MAF

Could it be this, or could it be that the engine's extra heat causing the alternators to die? I noticed a marked higher difference in temperature when I held my hand over a just turned off 331 engine than the 302.

Any help?? Anyone!!

USMC302 · 10-23-2007, 04:14 AM

Where is it grounded? I think I remember rounding mine directly to the frame..If yours is already on the frame, try taking it off, sanding the connection and using a thicker wire ( lower gauge) for the ground. Also, I wouldn't rule out the alt itself, was it a reman one or used one? Did it come with a warranty?

goodyear1984 · 10-23-2007, 05:44 PM

do you have under drive pulleys? whats ur idle at

10-19-2007, 06:44 PM	#1
nightmare95stang a nightmare conversion... Join Date: Aug 2005 Location: NJ Posts: 10	130A Alternator DIES every 2-3 months I have a 1990 mustang pulley setup on my 95 mustang. I also have a supercharger drive crank pulley, 4 inch accessory and 8 inch blower drive. I did a 331 stroker motor swap in May, and I bought a new 130A alternator for it, and it died 2 months later. I replaced it with a new one, and it just died again this past week (3 months later). Does anyone have ANY insight on this? Are the electronics I am running a bit much where they would zap these new alternators so quickly??? -9 autometer gauges -Flex-a-lite dual fans (set to go on at 180 degrees) -MSD box -basically stock fuel system with a 255 in-tank pump and a Vortech T-rex external pump -42 lb injectors and matching MAF Could it be this, or could it be that the engine's extra heat causing the alternators to die? I noticed a marked higher difference in temperature when I held my hand over a just turned off 331 engine than the 302. Any help?? Anyone!!

10-23-2007, 04:14 AM	#2
USMC302 Registered Member Join Date: Apr 2001 Location: Gallatin, Tn Posts: 1,326	Re: 130A Alternator DIES every 2-3 months Where is it grounded? I think I remember rounding mine directly to the frame..If yours is already on the frame, try taking it off, sanding the connection and using a thicker wire ( lower gauge) for the ground. Also, I wouldn't rule out the alt itself, was it a reman one or used one? Did it come with a warranty? __________________

10-23-2007, 05:44 PM	#3
goodyear1984 Registered Member Join Date: Dec 2006 Location: new york Posts: 482	Re: 130A Alternator DIES every 2-3 months do you have under drive pulleys? whats ur idle at __________________ 347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters ^best et so far 11.6 1.61 60ft coming soon 9sec et's 1992 mustang gt 2001 gmc 1500 4x4 78 century boat 92 skidoo

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