I run two 100watt and four 55watt fog lights a 1000watt amp and two 10inch 800watt subs. When I run most or all of the extras and come to a stop light or stop sign the lights and stuff goes dim. but when I get going it crawls slowly up again on the volt meter. Smaller pulley on alternator to speed up alternator at idle maybe. or bigger alternator maybe????????

 

You need a WAY bigger alt. Those 6 lights alone are probably pulling a whole ton of current. Actually I would probably stop runing them till you get a bigger alt, wouldn't want to cause any unforseen electrical problems.

Try looking for an aftermarket 180-220 amp alt, that will handle your setup + more.