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Alt turns on and off at idle WTF???


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Posted

Stable up to 16v, but you charge at 16.xx daily? Im a lil CONfused?

I charge on the edge of what it can handle. Which is fine, until my voltage fluctuates like this

Posted

Watching the video again... I have a theory

Runaway voltage drop.
The voltage was dropping at the regulator because the regulator was drawing power to energize the alt. That voltage drop caused the regulator to think the voltage was lower than it really was, so it sent more power to the alt until it was going full field and the voltage caught up to what the setpoint was. Then it reduced the field current, reducing the power it was drawing, causing the voltage to go above the set point, so then it turns off for a second.

Rinse and repeat


Going to run some thicker wire from the alt (+) to the regulator. Will report back in a few minutes

Posted

Hmm... Ok... So that's what it was
I ran some 8ga straight from the alt to the regulator and it worked perfect.

Reminder: you can never have too much wire. Only too little ;)

Posted

im just wondering if it might be the external volt reg starting to go bad

My build log http://www.stevemeadedesigns.com/board/topic/143943-2001-mustang-gt-system-rebuild-box-build-pics-updated-61512/

2001 Ford Mustang GT

4.6 SOHC 380HP

270 amp Mechman alt

2 12" Treo SSX custom built.

6.47 cu ft, tuned to 32Hz

2 hifonics Brutus 2400.1, strapped

1 optima yellow top

1 Kinetic HC1800

14.4v @ 29Hz, 2k RPM

over 100ft 1/0 XS flex wire

Big 3 in 1/0

100sq ft fatmat deadener

145.3 on music, 142.6 sealed on music

Stop being a pussy and wall it off.

I hate when my google breaks too

I think the usps must be ran by a bunch of drunk ass oriental midget monkey's on methamphetamines.
Posted

ninja.

dam, hit post and you fixed it

glad you got it man

My build log http://www.stevemeadedesigns.com/board/topic/143943-2001-mustang-gt-system-rebuild-box-build-pics-updated-61512/

2001 Ford Mustang GT

4.6 SOHC 380HP

270 amp Mechman alt

2 12" Treo SSX custom built.

6.47 cu ft, tuned to 32Hz

2 hifonics Brutus 2400.1, strapped

1 optima yellow top

1 Kinetic HC1800

14.4v @ 29Hz, 2k RPM

over 100ft 1/0 XS flex wire

Big 3 in 1/0

100sq ft fatmat deadener

145.3 on music, 142.6 sealed on music

Stop being a pussy and wall it off.

I hate when my google breaks too

I think the usps must be ran by a bunch of drunk ass oriental midget monkey's on methamphetamines.

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