Alternator Options 3.5/3.9 V-Belt - Defender Source
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  #1  
Old September 6th, 2011, 06:22 PM
Smirk1010
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Justin
1986 3.5 V8 Ninety
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Alternator Options 3.5/3.9 V-Belt

I am looking for some advice/opinions on the available alternator upgrades for 3.5/3.9 V-belts (something in the 100-120A range). What I have gathered from searching the forum and elsewhere is that the OEM options are limited to a 45A, 65A, or 80A versions. Right now I have what I believe to be a stock 45A, but I am adding AC and want to have the option to add some extras down the road. The preferred aftermarket upgrades seem to be Mean Green and Bosch, and Mean Green seems to get mixed reviews. Are there any other options that I should look into? For those that have done the install, how happy are you with the alternator you chose? Thanks in advance.
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  #2  
Old September 6th, 2011, 06:26 PM
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Joshua
1995 Black ST - Rhinolined edition
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Do a search; I started a thread on it not too long ago about my switch to a 120. From Action Alternators I think.
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  #3  
Old September 6th, 2011, 07:16 PM
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Jake K.
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You can use a 94-95 D90 or 93-94 RR Classic 100amp alt. Just change the pulleys to v-belt and it's a bolt in. Use your old pulley instead of the serp one that comes on the new one.
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Old September 6th, 2011, 08:43 PM
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Phillip
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I got one from roverguy for my classic that has served me well. I think its a delco maybe 120 amp.
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  #5  
Old September 6th, 2011, 11:02 PM
Smirk1010
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Justin
1986 3.5 V8 Ninety
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Ah. I didn't realize that certain serp belt alternators could be used with a v-belt by using the old pulley. I thought I read somewhere that they spin the opposite direction or the pulley alignment was off. Thanks for the info.
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  #6  
Old September 7th, 2011, 08:20 AM
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Jeff Huff
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I agree with Josh and Phillip...Will Tillery sells units from Action Alternators (or you can contact them directly) and the units are great with an upgraded output of 120amps. The guys at Action are awesome to deal with and can explain everything you need to know about the pulley setups
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