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Old 06-12-2011, 12:23 PM   #1
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Default Hydra help today

I know there is a forum for this but I am trying to get the car back up today. tomorrow I will just call FM.

I need to adjust the voltage that the alternator is putting out. At idle I get 15.5 and at 4000 I am getting almost 17. My problem is that there is two settings on the Hydra. Input follower P-term and I-term. The manual dosent explain which direction the adjustment should go to raise or lower the voltage.

I first noticed this when I installed the LED tach. It has a battery voltage feature that warns of over voltage and it did; but because I have not made any adjustments since I installed my turbo kit I assume that the voltage has been this high since the install. Now this week I blew my 20A fuse for my A/C relay. I checked the system and cant find any shorts so my thought is the vigh voltage and high load is causing the fuse to blow.
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Old 06-12-2011, 03:36 PM   #2
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Ok, well apparently my reading sucks because the steps to adjust this were in the installation instructions. So got it adjusted but still blowing the fuse, traced it to the A/C clutch. As soon as it cools where I can get my hands down there I will inspect the wire and see what is up.

Thanks anyway.
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Old 06-12-2011, 03:45 PM   #3
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Yeah the pwm map.
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Old 06-13-2011, 11:09 AM   #4
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Get a 90-97 alternator and call it good.
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Old 06-13-2011, 11:46 AM   #5
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yeah your best bet so you dont have to dick with any of that **** is to swap to an NA alternator. I have a write up I did on here when I did it
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Old 06-14-2011, 01:12 PM   #6
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Thanks, I did find the adjustment and played with it some. Got the voltage down to 14.5 but I need to play with it some more because now the lights flicker. I saw the write ups about using a older alternator but it isn't worth changing a perfectly good alternator because I dont want to tune it.
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