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do i need a high powered alt.


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still_walkin 
Silver - Posts: 644
Silver spacespace
Joined: April 18, 2007
Location: California, United States
Posted: November 05, 2012 at 5:54 AM / IP Logged  
Hi what I'm doing to my 78 Nova is I'm gonna use a 5 channel amp and add one CIG charger and a set of hid headlights and a KICKER ZX700.5 (11-ZX700.5) amp. do you think high powered amp is necessary or the stock 63 amp should do
1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: November 05, 2012 at 7:11 PM / IP Logged  
Only if the existing alternator voltage is insufficient during normal use.
still_walkin 
Silver - Posts: 644
Silver spacespace
Joined: April 18, 2007
Location: California, United States
Posted: November 05, 2012 at 7:22 PM / IP Logged  
True I known newer cars can handle 10% more than needed but this is such an old car so long story short I'm going to need a high output
1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: November 05, 2012 at 7:32 PM / IP Logged  
still_walkin wrote:
newer cars can handle 10% more than needed
Question #1 - where is that info from?
still_walkin 
Silver - Posts: 644
Silver spacespace
Joined: April 18, 2007
Location: California, United States
Posted: November 05, 2012 at 7:50 PM / IP Logged  
I read it on a forum on this site I'm guessing your saying its incorrect
1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"
lurch228 
Silver - Posts: 1,338
Silver spacespace
Joined: August 08, 2012
Posted: November 05, 2012 at 8:11 PM / IP Logged  
From my experience you can get away with up to 500w with a analog amp,that is driving a subwoofer, with the stock alt. if you are using a 1 farad cap to spread the amps load out. If you're usung a digital amp which are much more effecient you can use a highe wattage amp. But like oldspark said total draw while in use is the determining factor based on voltage under load. If you can't turn on and use what you would normally use and maintain at least 12.5v full load then bigger alt will be needed as a reference.
still_walkin 
Silver - Posts: 644
Silver spacespace
Joined: April 18, 2007
Location: California, United States
Posted: November 05, 2012 at 8:27 PM / IP Logged  
True however capacitor is to store power when you need it .but have can I store it if I didn't have to spare in the first place. Me personally I would do the Ho alternator and big 3 but I trying to keep the car original as possible and the big 3 under the hood is gonna be noticeable. But a high output factory bolt on won't be noticeable
1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"
lurch228 
Silver - Posts: 1,338
Silver spacespace
Joined: August 08, 2012
Posted: November 05, 2012 at 8:46 PM / IP Logged  
oldspark wrote:
Only if the existing alternator voltage is insufficient during normal use.
Once again follow above. If you're running a sub you will need a cap with whatever alt you choose to use as the are not designed to take large spikes. And caps are designed to store voltage yes, but for the purpose of smoothing spikes which kills alternators. A large amount of people don't and replace alts because of it. See it all the time. As long as you can matian 12.5 volts or above with normal use for you then it won't be a problem.
still_walkin 
Silver - Posts: 644
Silver spacespace
Joined: April 18, 2007
Location: California, United States
Posted: November 05, 2012 at 8:53 PM / IP Logged  
Understand what your saying here's another scenarioin my other car I was using 3 digital amps and no cap one high output and a red top w/ the big3 and the voltage stayed above 12.5 and the salt has been running fine going on 4 years . But this is a more esessive example that caps are not as good as they seem. I decided I just going to upgrade the charging system and get a high output but hide the big 3
1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"
lurch228 
Silver - Posts: 1,338
Silver spacespace
Joined: August 08, 2012
Posted: November 05, 2012 at 9:12 PM / IP Logged  
Key word "DIGITAL" which means less power draw per watt. The Amp you listed is a Class AB not D = digital. And Red Top Battery by design is simular to a cap and battery in design due to it's low internal resistence, unlike a standard battery. So to a point you can use a Red Top and no Cap.
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