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OOPs - Forgot factory alternator is 50A
#840685
10/28/10 07:47 AM
10/28/10 07:47 AM
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Joined: May 2003
Posts: 8,430
St Charles MO
70Coronet500Vert
OP
master
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OP
master
Joined: May 2003
Posts: 8,430
St Charles MO
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Don't work very well with 1400 W stereo.....
No matter how responsible he may seem, never give your gun to a monkey!
1970 Coronet Vert
1972 Charger
1974 Satellite Sebring Plus Sundance
2001 Ram 4x4
2002 Intrepid
2006 300C
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Re: OOPs - Forgot factory alternator is 50A
[Re: 70Coronet500Vert]
#840689
10/28/10 09:17 AM
10/28/10 09:17 AM
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Joined: Apr 2007
Posts: 807
Toronto, Canada
dirtybee
super stock
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super stock
Joined: Apr 2007
Posts: 807
Toronto, Canada
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Quote:
Quote:
Time for an upgrade. 
bought a tuff stuff 100A and new regulator
where did you get it from? i ordered one from summit more than a month ago and it's on backorder. i ordered the black one. also, is a new type of regulator required with a 100 amp alt? thx
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Re: OOPs - Forgot factory alternator is 50A
[Re: 70Coronet500Vert]
#840690
10/28/10 09:26 AM
10/28/10 09:26 AM
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Joined: Jun 2008
Posts: 1,822
Colorado
denfireguy
top fuel
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top fuel
Joined: Jun 2008
Posts: 1,822
Colorado
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Quote:
Don't work very well with 1400 W stereo.....
Just out of curiousity what is that stereo fused at?
Craig
2014 Ram 1500 Laramie, 73 Cuda
Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango
Only previous Non-Mopar: Schwinn Tornado
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Re: OOPs - Forgot factory alternator is 50A
[Re: 70Coronet500Vert]
#840691
10/28/10 09:27 AM
10/28/10 09:27 AM
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Joined: Jan 2003
Posts: 75,043
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,043
U.S.S.A.
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Quote:
Quote:
Time for an upgrade.
bought a tuff stuff 100A and new regulator
What about your wiring ?
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Re: OOPs - Forgot factory alternator is 50A
[Re: dirtybee]
#840692
10/28/10 10:42 AM
10/28/10 10:42 AM
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Joined: May 2003
Posts: 8,430
St Charles MO
70Coronet500Vert
OP
master
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OP
master
Joined: May 2003
Posts: 8,430
St Charles MO
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I ordered chrome from summit and it shipped yesterday.
I wanted a new regulator, "just in case"
No matter how responsible he may seem, never give your gun to a monkey!
1970 Coronet Vert
1972 Charger
1974 Satellite Sebring Plus Sundance
2001 Ram 4x4
2002 Intrepid
2006 300C
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Re: OOPs - Forgot factory alternator is 50A
[Re: 70Coronet500Vert]
#840695
10/28/10 11:03 AM
10/28/10 11:03 AM
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Joined: Jan 2003
Posts: 75,043
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,043
U.S.S.A.
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Quote:
Quote:
Quote:
Quote:
Time for an upgrade.
bought a tuff stuff 100A and new regulator
What about your wiring ?
It is a good point. I have had to replace a couple wires already because they are brittle. I use a high temp wire in 12 gauge for any underhood wiring.
But I think you will need to address the main wire that goes thru the bulkhead and to ammeter and the ammeter , those parts are not rated at 100 amps I am pretty sure .
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Re: OOPs - Forgot factory alternator is 50A
[Re: JohnRR]
#840696
10/28/10 01:19 PM
10/28/10 01:19 PM
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Joined: Dec 2007
Posts: 18,157
Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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But I think you will need to address the main wire that goes thru the bulkhead and to ammeter and the ammeter , those parts are not rated at 100 amps I am pretty sure .
 ,...the factory Ampmeter is rated for a peak 70 amps@ 10 mins before it "melts down".....rewire the alternator directly to the starter relay terminal, convert to a volt meter gauge, plenty of aftermarket conversions to retain a somewhat factory appearance,..Redline should be your choice for their conversion gauge
....otherwise running that alternator as is, with no electrical upgrades, you might want to buy an EXTRA fire extinquisher for the "new" radio and alternator, and a set of bolt cutters to clip off the battery wires when its 
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Re: OOPs - Forgot factory alternator is 50A
[Re: DAYCLONA]
#840697
10/28/10 08:04 PM
10/28/10 08:04 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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100A at 13.8V is only 1380 watts.
Almost enough for you amps at max, anything else running will pull from the battery.
Ammeters ONLY measure current to or from the battery, if wired properly. Alternators will ONLY put out enough current to sustain the demand, if working properly.
I would run a heavy gauge wire from the alternator output stud, thru a fusible link or fuse to the amps, I would leave the normal car wiring hooked to the alternator as factory.
I know a bit about electricity and electronics.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: OOPs - Forgot factory alternator is 50A
[Re: Supercuda]
#840698
10/28/10 10:00 PM
10/28/10 10:00 PM
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Joined: May 2005
Posts: 4,734
Florida
BDW
master
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master
Joined: May 2005
Posts: 4,734
Florida
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Quote:
100A at 13.8V is only 1380 watts.
Almost enough for you amps at max, anything else running will pull from the battery.
Ammeters ONLY measure current to or from the battery, if wired properly. Alternators will ONLY put out enough current to sustain the demand, if working properly.
I would run a heavy gauge wire from the alternator output stud, thru a fusible link or fuse to the amps, I would leave the normal car wiring hooked to the alternator as factory.
I know a bit about electricity and electronics.
You definitely don't want to get your stero power source from under the dash. Any good installation will connect power directly to battery and use relays to switch on/off.
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Re: OOPs - Forgot factory alternator is 50A
[Re: Supercuda]
#840699
10/28/10 10:11 PM
10/28/10 10:11 PM
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Joined: Feb 2008
Posts: 30
Texas
GG1charger67
member
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member
Joined: Feb 2008
Posts: 30
Texas
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1400 watts is probable the rated output of the amplifier not the amount it draws.Amplifiers take a small amount of current and amplify it up to create something just this side of distortion.The better quality the amp the less distortion. Some of your better quality amps will be fused at 20 amps and produce 500 watts of power and lesser quality amps fused the same may produce a couple thousand watts of power albeit with plenty of noise (distortion).Subwoofer amps usually gobble up the most power due to the low bass notes.Jason
Last edited by GG1charger67; 10/28/10 10:18 PM.
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Re: OOPs - Forgot factory alternator is 50A
[Re: GG1charger67]
#840700
10/28/10 11:26 PM
10/28/10 11:26 PM
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Joined: Nov 2004
Posts: 7,647
Houston Texas
PAINT IT BLACK
Got a CHIP on my shoulder
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Got a CHIP on my shoulder
Joined: Nov 2004
Posts: 7,647
Houston Texas
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Run your stereo as a stand alone system. Big fused wire from the battery to a distribution block, and use relays for all your aftermarket stuff. Use in-line fuses as well on stuff like your head unit, eq, and any other gadgets you have. It can get complicated, but it feels good to have peace of mind and know it is wired up right.
These metal plates are bolted to magnets and the magnets hold it all to the underside of my Cuda's dash. I have a 4 channel and a 2 channel amp, a head unit, eq, electric cutouts, electric vacuum pump (brakes), roll control, my ammmeter, volt meter, and tach, as well as all the lighting for my gauges hooked up through this auxilary system.
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Re: OOPs - Forgot factory alternator is 50A
[Re: BDW]
#840702
10/29/10 09:07 AM
10/29/10 09:07 AM
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Joined: May 2003
Posts: 8,430
St Charles MO
70Coronet500Vert
OP
master
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OP
master
Joined: May 2003
Posts: 8,430
St Charles MO
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Quote:
You definitely don't want to get your stero power source from under the dash. Any good installation will connect power directly to battery and use relays to switch on/off.
Gents, I have done this before. I have a 2 gauge wire to the trunk from the battery. There is a 100A CB about 5 inches from the battery.
I have routed the amp turn on lead to control the amps. I need to check the dash, but I think this has already been converted to read voltage, not amps, so this may be much ado about nothing in my case, but very good info for those who do not have the conversion.
I went with a 100A alternator because I did not want to mess with all new brackets for a 140A alternator. Also, while max power is indeed 1380 watts w/o negatively affecting the battery, normal listening volumes are significantly lower so 100A should still let me charge the battery, which the 50A was not.
The 4 channel Audiobahn amp has 2 - 30 amp fuses and the 2 channel Audiobahn amp has a 30 amp fuse. I should be all good at 100A.
This is a great thread though. I had not thought about the ammeter on the dash til John mentioned it.
No matter how responsible he may seem, never give your gun to a monkey!
1970 Coronet Vert
1972 Charger
1974 Satellite Sebring Plus Sundance
2001 Ram 4x4
2002 Intrepid
2006 300C
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Re: OOPs - Forgot factory alternator is 50A
[Re: ahy]
#840704
10/29/10 10:16 PM
10/29/10 10:16 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Wiring an amp, or any load, to the battery is a great way to ensure that all the current draw will pass thru the ammeter all the time.
There is a reason the factory wired all normal loads to not pass thru the ammeter,. I suggest you rethink your plan and wire it to the alternator output stud.
One other point, input wattage will always exceed output wattage. It's a fact of efficiency, if your amp has a 20A fuse protecting it then it's maximum input wattage is 276W (13.8V x 20A). There is no way the output wattage can exceed that. In fact it's probably under 250W.
To be honest, a 1400W amp will probably draws in excess of 140A at max output.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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