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What alternator is bigger and better than the FD and compatible with our cars

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Old 01-30-08, 01:23 AM
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What alternator is bigger and better than the FD and compatible with our cars

just like the title says what is the next upgrade in alternator for our cars past the famous FD alt upgrade? and also if you run a fd alt and do not have problems, what all exactly are you running

thanks
stan
Old 01-30-08, 01:46 AM
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gm 130 amp..i think
Old 01-30-08, 02:15 AM
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Dont want to thread steal. But do FC alternators really suck? If so maybe ill get a new one also. haha
Old 01-30-08, 04:40 AM
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People recommend the FD alternator if you (for example) have a stereo-system with an amp., or if you're running an E-fan... I have the FD alternator on one of my FC's, and it's nothing too special 'in and of' itself.
Old 01-30-08, 05:09 AM
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Originally Posted by danamezjohn
well with FD alternators they produce more power then a FC one which could possible lead to more issues down the road.
Er, no...
Old 01-30-08, 04:01 PM
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The nice thing about the FD Alternator is that it is a direct plugin to the S5 harness.....S4 requires a little bit of wiring.

GG
Old 01-30-08, 04:06 PM
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Just do what I did. Take it to a REPUTABLE alternator shop and have them do a custom alternator for you built from your original one. I took my s4 alternator to one and they built me a 100 amp, plug and play alternator so I wouldn't have to deal with the bs of the pulley and wiring.
Old 01-30-08, 04:37 PM
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How much did it cost to get your alternator rebuilt with upgraded windings?
Old 01-30-08, 05:46 PM
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care to elaborate on that NZConvertible ? Are you referencing the more power statement or the more troubles down the road ?
Old 01-30-08, 07:20 PM
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Originally Posted by danamezjohn
well with FD alternators they produce more power then a FC one which could possible lead to more issues down the road. just get another fc one to be safe(NEW one)
Nothing is going to be harmed if you install an alternator with a higher current capacity. The alternator only produces as much power as your accessories are drawing.
Old 01-30-08, 08:00 PM
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why do you need so much power and just how big are you looking for?
Old 01-30-08, 08:23 PM
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1.3L is not that small

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i just wanted a good alternator upgrade, im not cheaping out and between a black magic 150 and maybe in the future some stereo stuff i wanted a very reliable charging system. the alternator on the car now took a crap right after the efan installation
Old 01-30-08, 08:24 PM
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Fd Alternator All The Way

FOR my seven i have a efan and an amp when i put the fd alternator on i had 14.8 at idle when my lights and my efan on it goes down to 14.5 it is beutifull
Attached Thumbnails What alternator is bigger and better than the FD and compatible with our cars-jse_fd_alt_1.jpg   What alternator is bigger and better than the FD and compatible with our cars-jse_fd_alt_2.jpg   What alternator is bigger and better than the FD and compatible with our cars-jse_fd_alt_3.jpg  
Old 01-30-08, 09:03 PM
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the fd alternator is capable of putting out more, but current draw is exactly that, a draw. because its capable of doing so does not mean that it will put out full current all the time, unless there is an electrical load that calls for it.

so yes, it does produce more power
but no, it will not cause more problems down the road.
Old 01-31-08, 05:22 AM
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Originally Posted by boostedfc3s
care to elaborate on that NZConvertible ? Are you referencing the more power statement or the more troubles down the road ?
Basically what they said. The extra capacity does not cause any problems. The comment was just a silly one...
Old 01-31-08, 08:48 AM
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Originally Posted by cwsttu
just like the title says what is the next upgrade in alternator for our cars past the famous FD alt upgrade? and also if you run a fd alt and do not have problems, what all exactly are you running
thanks
stan
There are no "direct" bolt on units. Even the FD alternator requires a pulley and wiring change to make it work.

If you want a direct bolt on, take an FC alternator to the local alternator shop and have them rewind it. A friend just did this at one of our local shops and they wound it for 150A. The cost was under $75.
Old 01-31-08, 09:15 AM
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What prevents the alternators with the higher than stock amperage from creating too much voltage. As a previous poster said, his reads 14.8 volts under draw(while certain components switched on). How close is this amount to being one which will do damage to the electrical components. What makes an alternator with 150 amps better than one which creates 125.
Old 01-31-08, 09:20 AM
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Originally Posted by satch
What prevents the alternators with the higher than stock amperage from creating too much voltage.
Basic principles of physics...

As a previous poster said, his reads 14.8 volts under draw(while certain components switched on). How close is this amount to being one which will do damage to the electrical components. What makes an alternator with 150 amps better than one which creates 125.
A 150A alternator can supply up to 150A of current, while a 125A alternator can supply up to 125A worth of current.

More current capacity gives you the ability to run more stuff. Lower amperage alternators will start to drop voltage if you pull too much current while a higher capacity alternator will not.

If someone is seeing 14.8V output from their alternator, something is wrong with the voltage regulator and it must be fixed immediately. Just around 14V is ideal.
Old 01-31-08, 11:29 AM
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but, isnt the voltage regulator internal with a stock alternator? atleast in a Series 4
Old 01-31-08, 12:01 PM
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the modofied alternators i sell are usally double the amperage rating they were before the mods..

the stator gets re-worked, diodes get swapped out, an hd voltage regulator is installed along with new bearings..
end result is a direct bolt in unit that pereforms as it should..

cost is between $200.00 and $300.00 depending on what model alt you choose, polished housing, etc.. there is never a core charge, it is cheaper if you send in a core to have built tho...

i have the FD and cosmo alternators with a v belt pulley on them too
Old 01-31-08, 12:02 PM
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Originally Posted by 311unity13B
but, isnt the voltage regulator internal with a stock alternator? atleast in a Series 4


its internal on all alternators 81 on up.. but there is a large selecion of aftermarket high performance oones available..
Old 01-31-08, 12:18 PM
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I've got an FC vert with a JDM swap, I've got an aftermarket stereo and 2 amps pushing a total of 8 speakers (when I turn the headrest speakers on), once I get a custom sub enclosure built I'll add a 3rd amp to power that. I've got one aftermarket electronic gauge will be adding more down the road. Without adding in the 3rd amp into the equation, at night with lights on, fan blowing (whether heat or a/c) and the stereo on my factory volt meter will sit around 12. So I definitely need to upgrade my alternator.
Old 01-31-08, 12:21 PM
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Originally Posted by JustJeff
I've got an FC vert with a JDM swap, I've got an aftermarket stereo and 2 amps pushing a total of 8 speakers (when I turn the headrest speakers on), once I get a custom sub enclosure built I'll add a 3rd amp to power that. I've got one aftermarket electronic gauge will be adding more down the road. Without adding in the 3rd amp into the equation, at night with lights on, fan blowing (whether heat or a/c) and the stereo on my factory volt meter will sit around 12. So I definitely need to upgrade my alternator.
good god! you definatly need an upgrade!

this is a perfect example of when you need an upgrade.. also most electronics are rated at 16 volts so they can get the best stats, so the closer you can get to 16 volts the better your electronics will work!


jeff, you have a pm
Old 01-31-08, 12:51 PM
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Originally Posted by JustJeff
I've got an FC vert with a JDM swap, I've got an aftermarket stereo and 2 amps pushing a total of 8 speakers (when I turn the headrest speakers on), once I get a custom sub enclosure built I'll add a 3rd amp to power that. I've got one aftermarket electronic gauge will be adding more down the road. Without adding in the 3rd amp into the equation, at night with lights on, fan blowing (whether heat or a/c) and the stereo on my factory volt meter will sit around 12. So I definitely need to upgrade my alternator.
Adding caps to each amp would help stabilize the power when the e-fan goes on. I added two to mine and it helped. Like you I have a 7 speaker system and 3 amps. Well, one amp is a 4 channel infinity amp. So it is like three amps. The caps really helped.
Old 01-31-08, 02:01 PM
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Originally Posted by YaNi
Nothing is going to be harmed if you install an alternator with a higher current capacity. The alternator only produces as much power as your accessories are drawing.
+1


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