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Old 10-19-2020, 03:26 AM   #26
silver_echo
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Quote:
Originally Posted by Mulder View Post
You might have to swap pullies if they are different. Also check whether the later alternator has an internal regulator as yours does, or is ECU controlled. If the latter it won't be compatible even if it fits physically.


This swap is already in my car. That alt is internally regulated, and the pulley matches just fine.
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Old 10-19-2020, 09:54 AM   #27
D-Rodman
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Black Ver 7 VF48 6sp RA

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Thanks for your comments, I was only looking at the physical shape of the alternator not realizing the internal systems could be a problem.
Glad to have a member confirm fit and function.
Ironically, I discovered yesterday both my battery terminals were not exactly fully tightened. After tightening the terminals my car is working 100% again.
I will install the 110 amp alternator anyway since I already ordered it.
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Old 10-19-2020, 02:26 PM   #28
Cougar4
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I suggest you leave the original one in since it is okay and install the new one if it is really needed at some point in the future.
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Old 10-19-2020, 04:03 PM   #29
D-Rodman
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Black Ver 7 VF48 6sp RA

Default What alternators fit 2002 WRX

Quote:
Originally Posted by Cougar4 View Post
I suggest you leave the original one in since it is okay and install the new one if it is really needed at some point in the future.


I have an aftermarket head unit and subwoofer, also aftermarket xenon projector headlight retrofit. I知 thinking the 110amp alternator is a good thing to have. Although it is working just fine now, I知 thinking the amperage bump would be beneficial.
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Old 10-19-2020, 05:12 PM   #30
cdska
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Quote:
Originally Posted by D-Rodman View Post
I have an aftermarket head unit and subwoofer, also aftermarket xenon projector headlight retrofit. I知 thinking the 110amp alternator is a good thing to have. Although it is working just fine now, I知 thinking the amperage bump would be beneficial.
You could also install a 1n4004 diode in line with the power line running to the alternator. Half a volt jump in charging regulation and my car loves it.
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Old 10-19-2020, 06:35 PM   #31
D-Rodman
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I don稚 know electrical, it痴 my kryptonite. I知 not sure the diode would be necessary with the 110amp alternator. Thanks for the tip, appreciate all the input as this is an old thread I revived with my inquiry and it is getting fresh input thanks to all you contributing.
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Old 10-20-2020, 04:04 PM   #32
Cougar4
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If your alternator is working correctly and the wiring is in good shape for the charging system then you don't need to add anything to the wiring. A battery can only hold a certain amount of charge. Making the charge voltage go higher is not necessarily a good thing in my book.
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Old 10-28-2020, 10:54 PM   #33
SubaruBastardProject
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If you're looking for higher output with minimal modification the PowerBastards 220 amp alternator is also an option.
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