What do i need?

[Anonymous 10+ year member]

I have 2 Viper 1200's and a Viper 200.4 I am running these off a stock 136 amp alt and an upgraded Rockford Fosgate/Exide 1100 amp battery under the hood. I also have a 150 amp circuit breaker under the hood and a 1 farad cap by the amps. When i am bumping it at my normal max volume and driving down the road the voltage drops to 10v sometimes 9.8v. Then the circuit breaker shts down my system after playing it for like 5 minutes at that voltage. What do i need to do to maintain around 12v at idle. Oh yeah i went to the local alt shop and they said they could not upgrade it because it is a 2004 Durango and it would mess with the computer. Would doing the big three, getting a 300 amp fuse under the hood, and adding another battery solve the problem? If so what battery?

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[SAG3 5,000+ posts]

need an alternator and to do the big 3

 

[Anonymous 10+ year member]

They said they could not upgrade or build me an alt.

 

[knukonceptz 10+ year member]

Try reading your previous post - useful info can be found there.....

http://www.caraudio.com/vb/showthread.php?t=135306

After you do the ground upgrade and remove the circuit breaker that is too small for the system (you need 200A or a 250A at most) then see what your voltage is at. Charge your front battery and adding a second are both good steps, but would do ONLY after you see how the ground upgrade helps. It really sounds like a bad connection. Where is the voltage reading at - Battery or Amp? Have you checked the reading at both to see if there is a difference between the two?

 

[johnecon2001 5,000+ posts]

They said they could not upgrade or build me an alt.

they're full of crap. There have been several people on here with durangos that have bigger alts.

That shop just doesn't want to deal with it. Find another one. Or buy from Iraggi, Excessive, etc.

 

[theCybe 5,000+ posts]

if anything, voltage drops would be more likely to scramble your computerized sh!ts.

 

[Prowler573 5,000+ posts]

they're full of crap. There have been several people on here with durangos that have bigger alts.

Actually, from what I was just told, no they aren't. I just called my buddy that rebuilt mine to see what he had to say about it. According to my guy the '04 Durango's stock alternator is a Nippendenso (sp?) unit that does not have a rebuild kit available to turn it into a higher-than-stock output alternator.

That shop just doesn't want to deal with it. Find another one. Or buy from Iraggi, Excessive, etc.

That was my guy's suggestion - there isn't going to be a kit to have your existing alternator rewound which leaves your only option being replacing the stock unit with an HO unit like from Iraggi, Excessive, MCR, etc.