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major engine mods for 5.2

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  #11  
Old 11-21-2006, 10:51 PM
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Default RE: major engine mods for 5.2

ORIGINAL: JD770


ORIGINAL: helmsa

Dump the ideas of underdrive pullies...If you are running any electronics, lights, amps, subs and the works, your alternator can't keep up with demand with the underdrives.

tried this?

I run under drives on my 87 mustang and it has a 95amp alternator, I seriously doubt the stock chrsyler one is less than 120, and probally is 140 like my stock ford one is in my 00. Pullies would be fine.

besides most three piece kits have two underdrive pullies and the alt pulley is an overdrive pulley to compensate. Youd get more from the U/Ds than you would much any other bolt on.
I have looked at underdrives for the magnum motors, and have yet to find one that overdrive the alternator. Does anybody know what the stock alternator output is?
 
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Old 11-21-2006, 11:09 PM
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Default RE: major engine mods for 5.2

Alternator 117 A - std.; 136 A w/trailer tow, snow plow etc.
 
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Old 11-21-2006, 11:19 PM
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Default RE: major engine mods for 5.2

I bought my underdrive pulleys from Summit Racing pn# ASP-504522, the waterpump and alternator pulleys are larger for compensation.
 



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