voltage drops to 9 volts at full tilt

[baneshecker 10+ year member]

i think its time for some extra power.

so i put the box in tonight and took a quick test drive, set the gains and i happen to glance at the cap. all it says is LOW. i was like O RLY so i hooked the DMM up to it and drove at 70 and played the typical "Late Night Tip" and sure enough 9.2 volts at full tilt. guess you cant run 2 memphis amps at 1 ohm. may have to change it up to 2 ohm on 1 amp till i save money for a HO alternator.

Any one have any suggestions?

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[Louisiana_CRX 5,000+ posts]

bigger batteries

 

[baneshecker 10+ year member]

Dont think bigger is the answer im thinkin multiple

 

[dman4486 5,000+ posts]

bigger batteries

to get it to 12v yes....

how much power are you running?

 

[baneshecker 10+ year member]

800 cca battery up front

1 farad cap in back

Big 3 upgrade

setup worked fairly decent with one amp

2 amps = FAIL

 

[revrider1 5,000+ posts]

U need more powa, I mean batteries...

 

[baneshecker 10+ year member]

about how much is it to have an alternator rebuilt with better internals and higher regulator

and after that get a kinetic 2400 up front and a 800 in the back

 

[dman4486 5,000+ posts]

get rid of the cap....it is presenting more load on the charging system

 

[audiolife 5,000+ posts]

about how much is it to have an alternator rebuilt with better internals and higher regulator
and after that get a kinetic 2400 up front and a 800 in the back

would need to know how much power you have to help you. while on a 3000 watt system that may be fine on a 10000 watt system it wouldn't be enough......a bigger alt would also help and you wouldn't necessarily need to bump up your voltage...unless you are trying to get every tenth of a db on a meter....

 

[bumpin buick 5,000+ posts]

Try a few batteries first before you upgrade the alt, and what amps are they?

 

[bad @SS chevy 10+ year member]

Do the alt. and another battery. I ran 2 802sx's with a 200amp alt and 2 batts..

 

[fbi90909 5,000+ posts]

what are you pushing?

it could also be that your battery in general is failing and the cap isn't helping the situation.

as they said some bigger batteries will hold you. there's about 3,500w being pushed from my system before i got my ho alt. 1 kinetik2400 and a half dead group 51 size battery upfront and at full tilt it trickles down to the low 11's before i cut it off. even so it takes the system a while for it to get to that point.

another thing is if your letting your system drop down to 9v then you could be causing damage to your amps and your cars electrical system.

 

[SPL Blazer 10+ year member]

get rid of the cap....it is presenting more load on the charging system

lol, I was waiting for someone to say this. Caps are crap.

 

[SPL Blazer 10+ year member]

try upgrading your front battery to the largest deep cycle battery you can fit in the stock battery location. Kinetik, Odyssey/Stinger, NorthStar, just a few brands to look into. Also make sure you have the big 3 upgrades done, if the new battery and upgrades don't help enough then look into adding another deep cycle battery to the rear. Unless you have a ton of money to dump into this at once your best bet is to upgrade the front batt before buying one for the rear.