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weird voltage drop


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i have a 1996 ford mustang v6. i have a brz-1700 and 2 skar 12s. my car will idle at 14.8 no matter what according to my volt meter. all the way up to about 70% volume i have no voltage drop what so ever not even by .1 volts but when i get to about 75 - 85% i drop down to high 13s but the whole car acts like its about to die. my rpms start dropping car shakes all my lights dim like crazy. i dont under stand why i have a what i believe is a entirely stock electrical. why does it act so weird?

Edited by new guy

*current*

1991 honda crx si

2 skar audio 12s

pioneer 6.5s

dual 400 watt amp

audio technix

db 1/0 wiring kit.

dual head unit

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cause its stock electrical.

it may idle at 14.8V, but because of the small wiring, your alternator can't push in enough power to keep it at 14.8.

i could possibly be wrong, but thats what it seems to me

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yea i know that but what i dont get is the amp is putting out atleast 800 - 1000 rms without any kind of voltage drop but as soon as i get around 1200 rms my car starts just going crazy but i never go below like 13v i know my stock electrical cant support the full 1700 rms

Edited by new guy

*current*

1991 honda crx si

2 skar audio 12s

pioneer 6.5s

dual 400 watt amp

audio technix

db 1/0 wiring kit.

dual head unit

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What voltmeter are you using and where do you have it hooked up too? Check the voltage at the amp with DMM and see what the differance is when its reading the 14.8v

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you'll never see the full 1700 with that amp anyways. Its rated at 14.4 volts, which means you'll need to constantly be charging and staying at 14.4 volts to sustain that 1700 watts, and even then you won't see it cause amps aren't 100% efficient.

What the f**k is an appropriate signature supposed to look like?

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i had the same problem, til i checked at the amp and found out i was dropping to high 11's :o

What the f**k is an appropriate signature supposed to look like?

2013 Kia Forte Koup

Pioneer AVH-X4600BT

iDMax 12

DD M1c @ 2 ohms

Rockford Prime 200.2

Pioneer 6.75" Comp Set

XS S3400, D2700

Project DB Battery Terminals

Axxess ASWC

Stinger HPM Everywhereeee

90 Sq. Ft. of Stinger Roadkill

Stock Alt

Stuff To Come

Sundown X-12

New Amp

New Comps

4 Channel Amp

My Current Build: http://www.stevemeadedesigns.com/board/topic/167462-13-kia-forte-koup-dd-setup/

My Old Build: http://www.stevemead..._+2000 +mustang

Avatar Courtesy of SnowDrifter

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i have a scorpion voltmeter i think and i tried straight to the batt and i tried to the radio. ill try to get a dmm and check. ill try to hook it up to my amp and see what it reads. maybe mustangs just have some kinda regulator or something to make them read incorrect.

*current*

1991 honda crx si

2 skar audio 12s

pioneer 6.5s

dual 400 watt amp

audio technix

db 1/0 wiring kit.

dual head unit

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Share on other sites

im pretty sure that most all fords have a pcm controlled alt.

so unless your bypassing that your not going to use the full power of your alternator. even then on a stock electrical your alt probly does maybe 100 amps. your cars probly using 30 amps to run.. so 70 amps left for everything eles.

there goes your 700 watts.

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i got a battery for you if you need it

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Can it be heard 2 blocks away, thats how i rate systems.

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