High Output alternators

[blownC6]

Ok, this should probably be in the Technical Overview section, but it looks like this section gets the most traffic....sorry.

Does anyone know the output of the factory alternator on an 04 22V with Vortec 335hp 5.7L? My guess is somewhere in the 50-60 amp area but that's just a guess. I run about 1400watts of audio and even with my 2 battery setup I'd like to be closer to 90-100 amps to handle the draw of the amplifiers. Any thoughts on High Output alternators and where I might get a marine grade HO alt would be appreciated.

I know you're out there Kevin, what would the Pros there at Tige' Performance Boats recommend?

[Matt Garcia]

Take a look at this thread for some ideas and potential problems:

http://www.tigeowners.com/forum/show...ght=alternator

IMO, it seems like it would cause more problems then its worth.

[flackpack]

Try www.Skidim.com They are a discount inboard shop, and they carry parts like this. You can also try calling Teague marine in Santa Clarita CA. They are a high performance boat shop. http://www.teaguecustommarine.com/home.html

[Tige M.D.]

the alternator is a 65 amp.

if you change to a 100+ amp alternator be sure to upgrade your charging harness. i've seen them melt due to the extra current. this wire is harnessed with alot of other wires and if it melts they all melt.

also, the bigger alternator will void warranties.

[blownC6]

Thanks for the great information everyone. I hadn’t considered the need to upgrade the gauge of the output wiring, but it makes perfect sense. I’ve made some upgrades to the stereo recently and haven’t had the boat out long enough to see if the extra draw on the electrical system is going to be a problem or not. I live in Arizona where heat in the summer becomes an issue so I was anticipating the increased workload on the factory alternator might cause it to overheat and that a higher output alternator might run cooler. Looks like I ought to wait till it gets hot around here and see exactly how the system performs. Thanks again for the replies, they are very helpful.