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Old 10-10-2021, 02:51 PM   #1
jeff6666p
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Join Date: Aug 2014
Chapter/Region: South East
Location: hampstead/nc
Vehicle:
1998 2.5rs06wrx swap
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Default Battery voltage drop

How accurate is the cobb accessports battery voltage? When the higher the revs in see the voltage drop. I see 13.2 above 4.5-5k.
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Old 10-11-2021, 05:52 PM   #2
AliBenn
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Chapter/Region: TXIC
Location: Greatwood/Sgrlnd
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1998 /2005 STunIcorn
Acadia Green RS-T

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With a similar swap
I would just get volt gauge

The AP might show accurate readings
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Old 10-12-2021, 07:12 PM   #3
jeff6666p
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Quote:
Originally Posted by AliBenn View Post
With a similar swap
I would just get volt gauge

The AP might show accurate readings
Do these cars shut the alternator off at higher loads? I put in the other alternator and Iím still dropping voltage to 13.12 under higher rpms
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Old 10-12-2021, 10:15 PM   #4
Marvick08GT
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Fairly typical with subarus. You can trick the Alternator into running higher voltage if desired.
"Alternator Diode mod"

Good luck!
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Old 10-13-2021, 08:14 AM   #5
rtv900
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this is exactly why you don't monitor nonsense data with no context

why would you worry and consider doing some work to something because your alternator outputs a lower voltage in a certain rpm range?


If it is right when the car idles that means it is working perfectly
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Old 10-13-2021, 06:07 PM   #6
jeff6666p
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Join Date: Aug 2014
Chapter/Region: South East
Location: hampstead/nc
Vehicle:
1998 2.5rs06wrx swap
black

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Quote:
Originally Posted by rtv900 View Post
this is exactly why you don't monitor nonsense data with no context

why would you worry and consider doing some work to something because your alternator outputs a lower voltage in a certain rpm range?


If it is right when the car idles that means it is working perfectly
I have a shorai lithium battery and the lower voltage could damage it. Also I was having issues with the car jerking when giving more then half throttle and low voltage can cause issues like that. After I put the 90 amp one in it was much better.
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Old 10-13-2021, 08:53 PM   #7
Marvick08GT
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Search the mod, it is necessary for racing batteries.
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