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Old 10-11-2021, 06:24 PM   #1
jeff6666p
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1998 2.5rs06wrx swap
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Default Alternator wiring question

I have a 98 rs with a 75 amp alternator. Iím upgrading to a 110. The stock fuse is only amps I know I need to up it but will the wiring handle it
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Old 10-12-2021, 12:38 PM   #2
Cougar4
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If you are just changing the alternator without adding a high current load to the normal wiring system I tend to think you will be okay. If the main alternator lead is at least a 8 gauge wire I think you will be okay.
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Old 10-12-2021, 01:38 PM   #3
jeff6666p
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Quote:
Originally Posted by Cougar4 View Post
If you are just changing the alternator without adding a high current load to the normal wiring system I tend to think you will be okay. If the main alternator lead is at least a 8 gauge wire I think you will be okay.
I have an 06 wrx swap which came with the 110. I notice at high revs my volts are dropping to 13.2. I donít know what the stock wire is.
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Old 10-12-2021, 05:32 PM   #4
jeff6666p
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Well the one I got was a 90 not 110. I put it in and the same thing is happening. Do these cars shut the alternator off at higher loads
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Old 10-14-2021, 12:08 AM   #5
Cougar4
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Your alternator may be controlled by the ECU. If there are three wires going to the rear connector that may be the case. Really, 13.2 volts isn't a bad thing. The battery will stay charged up at that rate. Just make sure the alternator can keep up with the load you have on it.
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