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I hav e one on my car with the regular alternator. I don't have any problems. I don't have the thermostat control hooked up so the fan is running all the time. However, if you have a big stereo or something you might have a problem.
 

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Yes. The stock alternator can barely keep up with a completely stock Mustang. Turn on your headlights and the A/C blower and watch the volts drop to 12.

Get a 130A+ 3G alternator, and get a better fan than the Black Tragic. A Taurus 3.8 fan is only $30 from the junkyard and is MUCH better.
 

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I've got that fan and a stock 4-cyl alt with no problems. Of course I don't run air conditioning or any of those other luxury items.
 
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