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Alternators and sound systems 

 

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 Post subject: Alternators and sound systems
Posted: Thu Jan 07, 2010 9:39 pm 
Oompa Loompa
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Age: 36

Posts: 33

Joined: 13th Jan 2005

Ride: XR6 EF

Location: Perth
WA, Australia

I've just killed my second alternator. Called RAC and the guy said a big amp can kill them quicker. Is this true? If not then what can make them wear quicker? This one was only like 5 years old.

Also I now need a new one. Are some better than others or are they all practically the same? I was just going to pick one up from repco or something. Is there a good manual on here on how to install them?

I knew I should have had that service earlier. :roll:
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 Post subject: Re: Alternators and sound systems
Posted: Thu Jan 07, 2010 11:14 pm 
Getting Side Ways
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Age: 28

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Ride: BA MKII Fairlane GHIA

Location: Berwick
VIC, Australia

what battery do you have?
what sound system?
power rating on amps and what rating fuses are on the sides?
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 Post subject: Re: Alternators and sound systems
Posted: Fri Jan 08, 2010 12:05 am 
Getting Side Ways
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Ride: Falcon EF Gli

Location: Melbourne
VIC, Australia

Alternator is pretty simple to replace. I found it easier removing the power steering pump first. Couple of bolts and unplug cables for the alt.

 

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 Post subject: Re: Alternators and sound systems
Posted: Fri Jan 08, 2010 9:05 am 
Oompa Loompa
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Age: 36

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Ride: XR6 EF

Location: Perth
WA, Australia

sorry. Forgot to put the details down.

It's a EF falcon. The battery is a megatron battery -530 CCA@ 18°C RC95 (don't know if that means anything)

The sound system is a pioneer DEH-P6550 deck, MB Quarts speakers all the way through. 2x 12" Kenwood subs and a Alpine MRP-F240 amp.

Don't know how to check for the fuses.
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 Post subject: Re: Alternators and sound systems
Posted: Fri Jan 08, 2010 12:00 pm 
Getting Side Ways
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Ride: BA MKII Fairlane GHIA

Location: Berwick
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its not the stereo... mayby the alt just wanted to let go, these things happen
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 Post subject: Re: Alternators and sound systems
Posted: Fri Jan 08, 2010 12:35 pm 
Technical Contributor
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Ride: Ford EB II Falcon

Location: Morphett Vale
SA, Australia

Yea i dont think it is the sound system i have an

Alpine 9887
2x Pioneers 12 Inch Woofers Being Fed 950wrms (so yea over kill)
JBL 60wrmsx4
Focal 165v2 Splits

and all of this is in an EBII Falcon so the Alternator isnt as good, the main issue is the voltage drops and spikes with my huge Mono Block capable of 1500wrms !

 

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 Post subject: Re: Alternators and sound systems
Posted: Fri Jan 08, 2010 1:07 pm 
Getting Side Ways
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yeah peeandham ive seen your thread on mea .. i should get around to making one as i think you would really like what i have done all i can say is
12"dual voice 3krms custom option audio hehe how does 141.5db sound
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 Post subject: Re: Alternators and sound systems
Posted: Fri Jan 08, 2010 1:15 pm 
Technical Contributor
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Sounds very nice would like to see it !

I need to upgrade my power cables though :(

 

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 Post subject: Re: Alternators and sound systems
Posted: Fri Jan 08, 2010 1:37 pm 
Oompa Loompa
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Age: 36

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Joined: 13th Jan 2005

Ride: XR6 EF

Location: Perth
WA, Australia

So just get a new one and don't change anything?

Are all alternators the same?

Just talked to some people. They said it could be the regulator. Something about checking if the brushes are worn down. The thing is I don't know what a worn down brush looks like.
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 Post subject: Re: Alternators and sound systems
Posted: Fri Jan 08, 2010 4:59 pm 
Getting Side Ways
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Ride: 92 EB s

Location: DORRIGO
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Kenay wrote:
yeah peeandham ive seen your thread on mea .. i should get around to making one as i think you would really like what i have done all i can say is
12"dual voice 3krms custom option audio hehe how does 141.5db sound

is that from a single 12?
3000wrms at what ohms?
what amp you running?
and who measured it.


on topic here
in my old 86 prelude i killed alts running amps.
but not to much problem in the falcon, the main problem is the alt pully squealing when i start it up after pumping trax.
or during a sweep when the voltage drops to much and it squeals some more.

12"cvr taking 800wrms from a OA mono.
plus the speaker amp.
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