Can you put a smaller pulley on an High output alternator?

[admaster_99 10+ year member]

I have a ho alternator that puts out 220 amps but it really doesnt start putting a decent amount of amperage until the engine is revved up. So at idle it puts out next to nothing and I was wondering if I can put a smaller pulley on it to better amperage at idle?

Also another question I get serious voltage dropage down to like 10-11 volts with just one mtx 500 watt amp if I did the big three in 1/0 will this help? I did it with 4 gauge and it didnt do much.

I have an mtx 500 watt amp running 2 12" pioneer premeires that are 1,000 watts rms. Also I have a little 200 watt amp running my highs.

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[pro-rabbit 5,000+ posts]

Sounds like your ATL and/or battery is failing. Could also be faulty installation.

 

[admaster_99 10+ year member]

Yeah ok I think it would have to be the battery, cause it was like that forever with my stock alternator. And then I put my ho alternator in and it made it worse like my stereo at high volumes would fail like cut out. Or is it possible that they didn't hook my alternator up right?

 

[bubbagumper6 5,000+ posts]

If your running a 220A alt and getting voltage drops with a 500w amp you definitely have something wrong.

 

[pro-rabbit 5,000+ posts]

Go to your local autozone or something and have them test it. Something is very wrong.

 

[admaster_99 10+ year member]

Something as in what can you give me an idea to what your leaning towards?

 

[bubbagumper6 5,000+ posts]

Like a failing alternator or battery...just like pro-rabit said