Low Voltage Question

5.0PiMpin · 11-21-2001, 09:40 AM

Hey guys, i installed an underdrive pulley kit on my 89 5.0 and since then i have been having nuthin but low output form my altenator. did my alt go out or wat? i have a phat stereo in there right now , power 1000a2 rockford amp and 2 JL audio 12's and i was wonderin wat type of alternator i should get. i heard sumtin about a 94 5.0 alternator being a good replacement?

5.0PiMpin · 11-21-2001, 03:33 PM

exgmguy · 11-21-2001, 05:33 PM

You need a higher output alternator. The upgraded version is available in every Mustang magazine for less than 200.00.

Mustang_289 · 11-22-2001, 07:36 AM

Yup - your alternator is not providing enough juice with the stereo. I good rule of thumb is 100amp alts when installing pullies. I would also calculate how much total amps your high-powered stereo draws and base your alt upgrade to handle that power.

Like your stang - what size tires and wheels are those?

11-21-2001, 09:40 AM	#1
5.0PiMpin Registered Member Join Date: Nov 2001 Location: Daly City CA USA baby Posts: 42	Low Voltage Question Hey guys, i installed an underdrive pulley kit on my 89 5.0 and since then i have been having nuthin but low output form my altenator. did my alt go out or wat? i have a phat stereo in there right now , power 1000a2 rockford amp and 2 JL audio 12's and i was wonderin wat type of alternator i should get. i heard sumtin about a 94 5.0 alternator being a good replacement?

11-21-2001, 03:33 PM	#2
5.0PiMpin Registered Member Join Date: Nov 2001 Location: Daly City CA USA baby Posts: 42	???

11-21-2001, 05:33 PM	#3
exgmguy Registered Member Join Date: Feb 1999 Location: Utica, Michigan Posts: 2,631	You need a higher output alternator. The upgraded version is available in every Mustang magazine for less than 200.00. __________________ 1988 Mustang GT stock bottom 302, C4 10.9 @ 128 with 8 psi of Novi 1000 boost!----STOLEN 1989 Mustang notchback Warmed up 306 with a Procharger.

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11-22-2001, 07:36 AM	#4
Mustang_289 Registered Member Join Date: Sep 2001 Posts: 512	Yup - your alternator is not providing enough juice with the stereo. I good rule of thumb is 100amp alts when installing pullies. I would also calculate how much total amps your high-powered stereo draws and base your alt upgrade to handle that power. Like your stang - what size tires and wheels are those?