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Old 06-29-2012, 06:21 PM   #1
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Question?

Just changed out my stock alternator with a New PA Performance one. I installed it hooked everything up and when I started it up and put it in drive all my lights start dimming ?

I have underdrive pulleys but the alternator has the bigger stock pulley on it , could that be the issue ?
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Old 06-29-2012, 06:32 PM   #2
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yes it could. if you went bigger alternator and bigger pulley. you gained nothing. if you have a smaller pulley, try it.
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Old 06-29-2012, 07:04 PM   #3
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Quote:
Originally Posted by dreamstang
yes it could. if you went bigger alternator and bigger pulley. you gained nothing. if you have a smaller pulley, try it.
I have the smaller pulley on the stock I'll swap them tomorrow and see how that goes
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Old 06-29-2012, 07:19 PM   #4
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you may need a new belt also.
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Old 06-30-2012, 12:08 AM   #5
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What's ur idle at?
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Old 06-30-2012, 01:25 AM   #6
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Re: Question?

A bigger pulley on the alternator will slow it down and decrease its charging rate.A smaller pulley will spin it faster and increase its charging rate.
Keep the smaller pulley on the alternator IMO.
I always keep the stock sized pulley on my alternators as that is the speed they were designed to run at. Any more or any less and you may have electrical system issues.


I think you have some kind of wiring issue or the alternator is defective.
I suppose your idle speed is correct?
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Old 06-30-2012, 09:40 AM   #7
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Quote:
Originally Posted by 1fst86
What's ur idle at?
Idle is at 1000rpm

---------- Post added at 08:40 AM ---------- Previous post was at 08:38 AM ----------

Quote:
Originally Posted by Trojan Horse
A bigger pulley on the alternator will slow it down and decrease its charging rate.A smaller pulley will spin it faster and increase its charging rate.
Keep the smaller pulley on the alternator IMO.
I always keep the stock sized pulley on my alternators as that is the speed they were designed to run at. Any more or any less and you may have electrical system issues.

I think you have some kind of wiring issue or the alternator is defective.
I suppose your idle speed is correct?
Yea I picked it up from the speed shop again on Thursday and he recommended a new alternator and go back to stock pulleys
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Old 06-30-2012, 11:19 AM   #8
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I put my stock one back on and fired up, volts are still low (reason my speed guy said to change to a new one) ,PA Performance alternators say upgrade to a #4 gauge wiring. Anyone know a good upgraded #4 gauge wiring ?
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Old 06-30-2012, 12:24 PM   #9
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Re: Question?

Quote:
Originally Posted by WhiteCobra94 View Post
I put my stock one back on and fired up, volts are still low (reason my speed guy said to change to a new one) ,PA Performance alternators say upgrade to a #4 gauge wiring. Anyone know a good upgraded #4 gauge wiring ?
Any auto parts store should have the wire and connectors.
I would recommend crimping and soldering the connectors.


What is your idle speed and how many electrical components are drawing power?
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