Lower cost alternates for high power alternators?
 

I'm planning on putting an amp/sub in my 911 -- I drive it on my long commute a couple days a week during the summer and I need tunes! And I just can't hear the Eclipse head unit over the engine, especially when I've got earplugs in :)

So the amp I have handy to put in the car is a Diamond Audio D7104... a 4x100 amp that can at peak draw 65-70 amps. I have to admit I don't know what the stock alternator puts out, but I'm guessing its around that.

I noticed Pelican sells a $550:eek: 95 amp alternator. I swear I remember reading a post last year where people listed low-cost alternatives to expensive Porsche parts, and I thought there was an alternator on that list. Does anyone know if there are any lower cost higher output alternators available?

I'm not going to be boomin' or anything, btu I don't want to worry about the alternator keeping up with the draw on the battery.

I refuse to mention a rebuilt 95amp only because you might go booming past me some time, I get enough booming from the ricers.

Keith Epperly 87 slant nose carrera cabriolet ( not a sound proof coupe)

Its an 10" sub, it won't boom :)

I would be almost certain that the 95 amp alternator won't fit your fan housing since it wouldn't fit in my '73 911's fan housing. But if you insist on trying I can make you a deal on a 95 amp alternator that is almost new........

Jim
'73 911

Jim, can you PM me with info about the part you have?

Still looking at options, and Pelican says it fits all models of 911...?

On a side note, does anyone know what the stock is on a '68? I've been told 55 amp, but a couple people told me it was 35. When I add up lights, etc, 35 doesn't make sense to me. Can it possibly be that low?

Re: Lower cost alternates for high power alternators?
 

I wouldn't worry about the amp load for routine ear damage volume. I'd bet that at 110db your drawing 10amps. 110db means leaning over to scream at your passenger... of course good deep organs will draw more.

maybe put a small amp meter to the amp after install before you spend big bucks on an alt ?
Warren mentioned a Sears unit that's around $50

I have to lean over and scream at my passengers for them to hear me over the engine/exhaust anyway. Music will have to be louder. :)

Seriously, though, just looking at alternatives for when it turns out to be a problem. Switching to HIDs helped some, as they draw half the power as the stock headlights.

OK.. I'll also try the serious act..

I went from external regulator to internal by shaving the plastic cowl that the alternator sits in.. I used a Valeo unit. Much cheaper than Bosch.
The Valeo is a good unit, although Bosch gets bigger praise.
I just changed the valeo regulator for entertainment because I was in there. The slip rings looked beautiful and I will use the old/good reg as a backup.

and not for nothing.. the external regulator is a better design than an internal reg design that sits in engine heat.

If you convert to the later alternator you will have to find a fan shroud that fits. Try a 4R casting number or later for a Carrera Alternator. I've never seen that 95 amp australian thing.

Also, you should probably upgrade the primary wires going from the alternator to the starter, and do something about the wires going from the B+ to the engine compartment. 68's don't have a 14 pin connector, right? So you need a way to get the juice from the uprated alternator to the car's main bus without cooking any 36-year-old wires. You are probably going to wire the amp and head unit directly to the battery, so make sure your cable connections are nice and tight all the way to the front of the car. 68's have a single battery, you might consider upgrading that also.