proper power upgrades but voltage drops

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seismicburban

Member - Posts: 18

Joined: July 05, 2009

Posted: July 07, 2009 at 11:45 PM / IP Logged

Room is not an issue it is a 454 in suburban, and like my sig states I have done the big 3, so one more 295 amp alt and i should be good?

AVIC F90BT

4 15L7s

4 ZX 1000.1s

BIG 3

295 AMP ALT

2/0

2 KINETIK HC 2000

STILL GETTING VOLT DROPS

wth???????

seismicburban

Member - Posts: 18

Joined: July 05, 2009

Posted: July 07, 2009 at 11:51 PM / IP Logged

Sorry, I guess I did not put the Big 3 in my sig, thought I did. But yes that was one of the first things I did.

AVIC F90BT

4 15L7s

4 ZX 1000.1s

BIG 3

295 AMP ALT

2/0

2 KINETIK HC 2000

STILL GETTING VOLT DROPS

wth???????

daboss593

Copper - Posts: 154

Joined: March 29, 2008

Location: Florida, United States

Posted: July 08, 2009 at 1:23 AM / IP Logged

alt may be the issue but how long before your volt drops? may be your alt dsnt have a big enough heat sink on it? which you will lose alt charging power due to it getting hot etc.

OWWWWWWWWWWW you said you discharged the cap!

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: July 08, 2009 at 8:24 AM / IP Logged

Whats your engine speed when this happens?

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haemphyst

Platinum - Posts: 5,054

Joined: January 19, 2003

Location: Michigan, Bouvet Island

Posted: July 08, 2009 at 10:22 AM / IP Logged

I'm confused by the title of the thread...

If the proper power upgrades were done, then the voltage CAN'T drop... can it?

The PROPER upgrades dont just include underhood wiring, but installation technique as well. Did you crimp and solder all of your connections? Did you clean every chassis ground point and weather-protect it after termination? WHERE did you obtain your chassis grounds? Are you certain you are using adequate gauge wiring throughout the system? Who sourced the alternator? Are THEY reputable? Is the alternator built AS AN HO UNIT, or is it just a re-hashed, off-the-shelf, GM large-case unit? 300A from even a large case GM is still a BUNCH of power. If you don't have at LEAST a 1/2 inch connection stud on the alternator, you don't even have output capacity for 300A.

It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

aznboi3644

Gold - Posts: 2,600

This member consistently provides reliable information

Joined: May 01, 2006

Location: United States

Posted: July 08, 2009 at 8:38 PM / IP Logged

thread title should be changed to "unproper power upgrades and voltage drops..wth??"

Custom Enclosure Design

seismicburban

Member - Posts: 18

Joined: July 05, 2009

Posted: July 08, 2009 at 9:52 PM / IP Logged

Wow a lot of ?s. Here we go, all connections are crimped and soldered. I do not know what you mean by weatherproofing at termination. The grounds are the engine block, fender, and the amps are grounded on a ground down to bare metal rear seat mounting hole. The wire is all 2/0 except for the 1/0 that runs into each amp pos and grnd. The alt was from nations out of missouri. The stud is 1/4 inch. the voltage only drops when I am banging on it real hard for a while and if i am just cruising with the ac on and bumping .

thanks for all the info possible

AVIC F90BT

4 15L7s

4 ZX 1000.1s

BIG 3

295 AMP ALT

2/0

2 KINETIK HC 2000

STILL GETTING VOLT DROPS

wth???????

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: July 08, 2009 at 10:05 PM / IP Logged

https://www.the12volt.com/installbay/forum_posts.asp~TID~114878~PN~0~TPN~1#557106

seismicburban

Member - Posts: 18

Joined: July 05, 2009

Posted: July 09, 2009 at 5:31 PM / IP Logged

SO you are saying that I definately need another alt

AVIC F90BT

4 15L7s

4 ZX 1000.1s

BIG 3

295 AMP ALT

2/0

2 KINETIK HC 2000

STILL GETTING VOLT DROPS

wth???????

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: July 09, 2009 at 6:12 PM / IP Logged

Earthquakes take a lot of power to duplicate. You may need to UpSeis your alternator. Your bass amps WILL pull around 100 amps each.

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