help with alternator
09-02-2008, 07:48 PM
#1
1st Gear Member
Thread Starter
Join Date: Aug 2007
Location:
Posts: 141
help with alternator
i believe my alternator died recently due to my aftermarket radio installed. i was told my alternator could handle my amp and subs which were 1200 peak watts and 500 rms. but turns out i've had problems ever since installing my subs. so my question is what is the stock alternator rated at on our 2005 v6's and what alternator should i purchase to not have this problem. also how hard is it to change it out? any other info i would greatly appreciate it.
Thanks
Thanks
Last edited by dirtriderdrew77; 09-02-2008 at 07:58 PM.
09-02-2008, 08:16 PM
#3
1st Gear Member
Join Date: Jul 2008
Location: FL
Posts: 123
Mine is an 06 pony and my brother's is an 06 pony as well... my brother's alternator broke at 46k miles and my alternator broke a month after and the mechanic said that it was because of the battery that they come with only last for like 2 years or less... So i recommend to check your battery if you haven't change it. And I haven't heard of any aftermarket alternator... It only took me 20 minutes to change it by my self, really simple.
09-02-2008, 08:18 PM
#4
6th Gear Member
Join Date: Jul 2008
Location: Acworth, GA
Posts: 12,260
Mine is an 06 pony and my brother's is an 06 pony as well... my brother's alternator broke at 46k miles and my alternator broke a month after and the mechanic said that it was because of the battery that they come with only last for like 2 years or less... So i recommend to check your battery if you haven't change it. And I haven't heard of any aftermarket alternator... It only took me 20 minutes to change it by my self, really simple.
09-02-2008, 09:06 PM
#6
1st Gear Member
Join Date: Jul 2008
Location: FL
Posts: 123
it happened to me and to my brother..... all i say is have your battery check out at any autozone or autopart before you put your new alternator on.. I tell you this cause i had to replace it two times because of the battery was bad and broke the new alternator...
09-03-2008, 07:54 AM
#7
Site Moderator of Fury!
Join Date: Aug 2007
Location: Houston, TX
Posts: 5,104
I found this little snippet. Try and find out what size alternator you have factory and then use this to adjust accordingly.
Just to give you an idea...
If you have a 1000w RMS of output that means you will need 1000/0.8 (80% efficient amp) = 1250w input. So your car needs to deliver 1250w to your amp to freach full potential. Now take 1250w / 14.4 volts (running voltage of car) = 87A. So in order to fully run your system you would need about 87A. That is even an underestimate because the amp may not even be 80% efficient and the running voltage may not be 14.4 volts. But it will give you an idea of what you would need.
If you have a 1000w RMS of output that means you will need 1000/0.8 (80% efficient amp) = 1250w input. So your car needs to deliver 1250w to your amp to freach full potential. Now take 1250w / 14.4 volts (running voltage of car) = 87A. So in order to fully run your system you would need about 87A. That is even an underestimate because the amp may not even be 80% efficient and the running voltage may not be 14.4 volts. But it will give you an idea of what you would need.
09-03-2008, 04:40 PM
#8
Cut & Paste Expert
Join Date: May 2007
Location: NW Arkansas
Posts: 13,322
Go with a HI-Output aftermarket alternator 
Take the recommended fuse size
that the amp has and thats the
maximum amps it can possably draw.
Regardless of output wattage.
Most amps are overrated. The stock Alternator is 135Amps.
Add the fuse size to 135Amps qand
thats the size Alternator you need.
Take the recommended fuse size
that the amp has and thats the
maximum amps it can possably draw.
Regardless of output wattage.
Most amps are overrated. The stock Alternator is 135Amps.
Add the fuse size to 135Amps qand
thats the size Alternator you need.
Last edited by 157dB; 09-03-2008 at 04:48 PM.
Thread
Thread Starter
Forum
Replies
Last Post
Golfsito
GT S197 General Discussion
9
10-06-2015 11:02 AM
mrmrultimate
Texas Regional Chapter
2
09-10-2015 09:43 AM