Crunch GP3000D-Pro...What amp alternator and what kind of extra batt

[Jeepjones85 10+ year member]

Hi I have a 03 GMC ext cab truck 4.8L stock 105 amp alternator

What kind and size extra batt do i need for this amp

And how big of a alternator should I run???

I can get a stock 145amp alt from the local parts store

for 245$$ Is that big enough ?

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[JBGabriel 10+ year member]

That alt will help out but a bigger one would be much better with the amount of current youll be drawing. If you do use that alt I would go with at least two hc2400 or equivalent in the back. You should also have the big three done in zero gauge and at least a negative and positive run of zero gauge to the back.

I think you should be ok with that but you might ahve to add more batteries if you plan on running the 145 amp alt.

 

[Jeepjones85 10+ year member]

Ok let me make sure i got this right .... Do I need a second run of 3/0 wire from the negative side

of the battery under the hood or can I just weld a bolt to the frame and ground it there ??

Im not saying that i will go with this alternator I would rather buy a bigger one than

have two batt's in the back

 

[DBBOOM 10+ year member]

Contact Dave at http://www.DCPowerinc.com , there is a phone number on the website. They can get you an alternator that will be sufficient and will do the amps that its rated at.

 

[x2o 10+ year member]

I ran mine off of stock 110A alternator and two batteries. The batts were powermaster, D3100 in the trunk (BEAST of a batt) and a D1200 in the front. Voltage dropped to 12.7 at full tilt with a/c on and 300w from a kicker amp to the components.

Also, only running a single pos 1/0 run from the front to the back. Batt is grounded to the trunk floor in the back, not to the front. Big 3 was also done.

 

[audiolife 5,000+ posts]

I would stick with going with 2 AGM group 31s in back (example 2 kinetik 2400's) If you went with a bigger alt I would also contact http://www.missinglinkaudio.com about a voltage module to raise the voltage a tad there are trade offs in doing so (battery life) but it should keep your amp happy.

 

[Jeepjones85 10+ year member]

Update I did the Big -3 could I try and run one Kinetik HC 2400 right now

and then later buy a second?

 

[91Chevy 10+ year member]

You could try.

 

[Jeepjones85 10+ year member]

Contact Dave at http://www.DCPowerinc.com , there is a phone number on the website. They can get you an alternator that will be sufficient and will do the amps that its rated at.

I called and talked to the DC power Tec guy and he told me that I would

have more than enough power if I went with a Powermaster-3400 under

the hood and upgraded to ther 275 amp alternator...I talked to him for

awhile and he said if I just put a new high output battery in under the hood

and one in the back by the amp would be a wast of money and the stock

alternator could not keep up and then the second batt would be just a

load on the system ...Everything he said made good since so I think that

is what I will do. Thanks for the Help //content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif