I don't understand your comment. I have a 30A Toyota (I think) alternator in my Lancair and it works fine at 12,500'. Should I be worried about something?You don't plan to fly over about 6000 ft?
Can anyone recommend a part number for an automotive one wire alternator that can fit on an O-320...
Toolbuilder, I am referring to an internally regulated alternator with the ability to shut the field. I guess it would more correctly be called a two wire alternator, but some people still refer to them as one wire. I just picked up a 10SI alternator, but the diameter is a bit too large. some of the others that people have given links to look like they might be a bit big also, but can't really find dimensions. Auto parts stores are not much help so I might wind up having to go to an alternator shop with somebody that knows more than just make and model of car and tell them I need this mounting style, this max diameter, V belt pulley, etc. If those types of alternator shops still exist...
I used this 40 Amp alternator on my RV for 11 years with no problems. Be sure to get the real ND and not a Chinese knock-off version. I asked Bob Knuckolls about using an automotive unit and he agreed there is some slight risk, but not very much at all. I ran mine as purchased with the internal regulator and never had a problem. YMMV however. I did have a larger pully put on to reduce the RPMs a bit to make it last longer.
I also have the paperwork from Bob Knuckolls on how to rewire the internal regulator for external control and safety. Can't figure out how to post it here, but email me and I'll send you a copy…. n eight zee dee a ya h oo. c
I used this 40 Amp alternator on my RV for 11 years with no problems. Be sure to get the real ND and not a Chinese knock-off version.
I agree with the reliability of the ND and other alternators, but everyone should be aware that they can and will fail. I did not have overvoltage protection external to the ND alternator that Van's supplied with my kit. At about 300 hours, it went overvoltage to 17.5 volts. By the time I got everything shut off and back on the ground, it had murdered my Odyssey battery, but luckily that was it. Whatever alternator you use, be sure you have the overvoltage protection somewhere in the circuit.
Can anyone recommend a part number for an automotive one wire alternator that can fit on an O-320. I am not real particular on the amperage and will take anything over 30A.