[The Doggfather]

I've just purchased a 12" 4000 watt RMS competition subwoofer for my car. Problem is because of the massive amount of power it's putting out, I'll need to upgrade my alternator to feed it.

Is it poissible to modify my existing alternator to put out more power?

Or does someone know of a replacement that would be suitable?

This is the sub if anyone's curious... the almighty STROKER !

 

[markusfmeyer]

Couple of options. I chose one of the more "affordable" ones, which is the Saab alternator, 115amps. Search the archives for the exact model. Or, you can get one built, again, search the archives, I believe Mike Ramay got one for his project car that might have been 150 or 200amps.

 

[mramay]

There is a guy on eBay selling 150 amp units and I had one made here in Las Vegas that is a 140 amp alternator. Both are around $200 USD. That said, I'd suggest talking to your local alternator rebuilder to see if he can custom make you one. The guy that did mine here in Las Vegas started with a Delco alternator for a Tacoma truck, put a new front housing on it that was pretty close to the MB front housing, a v-belt pulley instead of a serpentine belt pulley, and a single-post regulator in it. It took some minor modification to the adjusting mount plus some 5mm shims on the back of the "mounting bosses", and I have a great alternator.

The guy here in Vegas said he could make me a 200 amp unit but I didn't need that much power.

Mercedes 380 420 500 560 Alternator 150 Amp 85-91 W126: eBay Motors (item 350372757120 end time Nov-05-10 15:50:31 PDT)

 

[Abdullah2009]

This may help:

http://www.benzworld.org/forums/w126-s-se-sec-sel-sd/1456410-upgrqading-mb-560sel-alternator.html

Good luck

 

[The Doggfather]

Thanks guys, appreciate the help.

 

[NordRhein]

Is it poissible to modify my existing alternator to put out more power?
------------------
You could reduce the pulley diameter to spin it up faster at idle. Because can you be sure a 200A alternator will put out more at idle than a 100A?

 

[wilson1010]

You wind it with bigger wire. But you have to know something about the electronics. Best plan is take it to an electric motor rebuilder. Try your diesel truck service place they will know who rewinds motors.

 

[Benznoob26]

You wind it with bigger wire. But you have to know something about the electronics. Best plan is take it to an electric motor rebuilder. Try your diesel truck service place they will know who rewinds motors.

There is a guy on eBay selling 150 amp units and I had one made here in Las Vegas that is a 140 amp alternator. Both are around $200 USD. That said, I'd suggest talking to your local alternator rebuilder to see if he can custom make you one. The guy that did mine here in Las Vegas started with a Delco alternator for a Tacoma truck, put a new front housing on it that was pretty close to the MB front housing, a v-belt pulley instead of a serpentine belt pulley, and a single-post regulator in it. It took some minor modification to the adjusting mount plus some 5mm shims on the back of the "mounting bosses", and I have a great alternator.

The guy here in Vegas said he could make me a 200 amp unit but I didn't need that much power.

Mercedes 380 420 500 560 Alternator 150 Amp 85-91 W126: eBay Motors (item 350372757120 end time Nov-05-10 15:50:31 PDT)

+1. My brother had his 80amp rebuilt and taken to 130 or 140 for $90 and it was plenty enough.