With halogen headlamps and high power stereo amplifiers & Subs getting popular, I’m guessing there are many people out there with alternators that are just not keeping up in the old Mustangs, resulting in flat batteries. So I have some questions, and I hope the answers will be useful to all.
With city driving at 30-35mph (50km/h) the alternator is doing fairly low RPM and thus not providing much current (faster = more current). So with the stereo blasting or the lights on it’s a flat battery in the morning. So what is the answer?
A) To install a larger Alternator does the regulator also need to be up-rated? Are some regulators better than others?
B) A smaller alternator pulley may be a solution, but what is the max safe RPM for an alternator?
C) What is the benefit of a single wire alternator? My understanding is they don’t generate anything at low RPM?
D) I believe the 66 originally came with a 38Amp alternator (mine is now a 60A) what size is typical for a modern family car as they have more electronics and better headlights.
E) Maintenance? – this I can answer – Clean those battery, ground, alternator and starter cable connections – at both ends of the cable!!! and even consider larger cables between the battery, starter and alternator. In a 12 VDC system even a small amount of oil, dirt or corrosion costs a lot of power.
So answers to the above please….. Thanks.