How to add a second alternator?

Question

I have a 1992 Buick Roadmaster Limited Sedan and the engine is a 5.7L 350ci 1987-1993 VIN# 7 with a CS 130 alternator stock. I would like to add a second alternator for my sound system without removing my A/C compressor. Once the second alternator is in I know how to connect the second battery and ground it properly. I just don’t know where to mount a second alternator and how I would run the belt and stuff in that area of the job.

How is this done and is this a job for a do it yourself type?

If not, then what would be a ball park price for a job like this?

Does anyone know of a shop that can do this type of work in the Metro Detroit area?

Thanks for any help you can offer.

Answer 1

I'd look into a bigger alternator instead, and maybe a capacitor.

A second alternator in that tight of a spot would be expensive to fabricate.

Answer 2

I was also looking to add a second alternator.  There are a few places that make the kits, but nothing for B-body cars.  I have a Roadmaster Limited myself so I know you're hard pressed to find ANYTHING made specifically for your car.  I was running 4 2400watt amps and one 800watt on the stock alternator.  A will 250 amp alternaotr (which I'm about to get) will be enough for you.  I also recommend at least a 5 farad cap and an extra battery.  Don't expect your alternator to charge batteries, run your stereo, and run the car at the same time though.  Turn the beats down for a while sometimes to let those batteries get caught up.

Answer 3

wouldn't you use a higher output alternator? I think that would be easier to do, than to fabricate another setup for a pulley into the engine compartment

that's my 2 cents

Answer 4

find a spot where an altenator can fit and still line up with the belt then you have to fabricate a mounting bracket that is tough then buy a bigger belt or you could just buy an upgrade altenator and use a capacitor and proper wiring add acouple marine grade batteries and you should be good my friend runs four 18s at 12000 watts in an expedition

Answer 5

Would would be doing much better and it would be cheaper to replace your stock alternator with a high output alternator.   That would be the best solution.   If you vehicle has a external voltage regulator,  which I doubt cause just about all alternators now have the internal voltage regulator.   but if it does have one,  replace it with the alternator and be sure that you get the right one to match the alternator.  

Answer 6

Are you sure it wouldn't be cheaper to upgrade your existing alternator? Emergency vehicles use larger units to run all their equipment. You might want to look into that first. Sometimes it's as easy as upgrading your rectifier and voltage regulator.