after a lot of searching i see there are a lot of options so, i say we make a thread ( this one ) that has them all listed and the things need to complete the installs. ......and......go!

 

alternator upgrade?

well a simple one is use the s5 alternator instead of the s4 alternator. needs some things swapped over but its better than the original one i had.

other people have made write ups using alternators from other vehicles or having their alternator rebuilt to handle more amps.

 

FD alt swap is pretty damn easy and a very good upgrade over the s4.

You need... the alt, a new pulley (japan2la has a great one) and some very basic rewiring skills.
There's a pic in the FAQs I think of how to rewire it, but I'm too lazy right now to find it.

 

^^^ x2 this was pretty much the first thing i did to my 7 (except the tune-up) it's hella easy, you can find cheap FD alts if you search around. then the only question is two belts or yoohoo?

 

only need the yoohoo or second belt if ya ditch the air pump. not much to do with the alt upgrade

 

What about S5 ? Is it easy to swap over to FD alternators?

I did some research before, 80amp is barely enough juice for even stock system + I dont even know how old is the Alternator in my car + Im planning to install a NAV to the 7 so ... I need at least 100 amp.

 

I had my alternator upgraded by IRP, its now 140 amps. They specialize in rebuilding FD ones, but can do FC ones too. Great business to deal with. http://irperformance.com/

 

Did you have the FD alternator upgraded, and what was the cost to do so?

 

No, stock FC s4 alt. I can not rememer what exactly what it costs, its the same price as they charge to do the FD ones...

 

had a local shop rebuild my s4 alternator to 120 amps I believe. saves the hassle of cutting, rewiring, and chasing down parts.

 

I bought a new FD alternator, it came tested at over 120amps IIRC, the wiring is not that bad.

I would advise you get your alternator rebuilt and upgraded at any local alternator/starter rebuild shop over buying a used FD alternator, the money saved in shipping can be used towards this.