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Old Feb 8, 2009 | 10:10 AM
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Another alternator question ?.....
Hello all, Im new here.......

I have a 89 F-150 4x4 with a 4.9 in it and its the Custom model, no a/c.....

Was looking to find out how many amps my alt is, its not stamped on it anywhere that I can see....

What size alt is suppose to be on this model truck?.....thanks.....
 
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Old Feb 8, 2009 | 11:53 AM
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The majority were 65 amp output, with 75 being the optional higher output on a truck with lots of elec equipment such as power windows, seats, trailer tow, and A/C.
 
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Old Feb 8, 2009 | 08:30 PM
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Wow, kind of thought it may have been more than that..lol..
Think Im going to need to go to a HO alt here soon....
Where can I look to find a drop-in at?.....thanks..
 
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Old Feb 8, 2009 | 09:54 PM
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summit racing....
 
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Old Feb 8, 2009 | 09:55 PM
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Or....check around your area and see if theres anywhere that rebuilds alternators....Its often cheaper to have yours rebuilt or upgrade to a locally built one than to buy a brand new off the shelf one...
 
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Old Feb 8, 2009 | 10:51 PM
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Ill check local tomorrow....thanks..
 
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Old Feb 11, 2009 | 08:06 AM
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I checked about having mine up graded, the guy said I could only get it up to 80 amps...
 
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Old Feb 11, 2009 | 07:03 PM
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Why do you need more? I ran a plow on my 80 with just a 65amp, and it did fine, except I did have to set the idle speed up a little bit when I was plowing.
 
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Old Feb 12, 2009 | 12:04 PM
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try a g3 130 amp, fordfuelinjection.com gives installation instruction. Your bracket has two settings. 50 bucks more, but power to spare.
 
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Old Feb 16, 2009 | 07:21 AM
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The guy who rebuilds alts here said he couldnt get anymore than 80amps out of mine......
But he also said my alt is a 2g, the new style alt....


Wanted to up grade due to fooling with cb radios, ect here as a hobby....


Thanks rileycollett, Ill check it out.....
 
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