I have a 1991 Miata and a one year old Westco Battery.
The Alternator has been replaced and everything appears to works fine, however, I checked for the Battery Voltage and it seems high.
(1) Voltage at Battery Treminals with MOTOR NOT Running is: 13.18 Volts.
(2) Voltage at Battery Treminals with MOTOR Running is: 14.58 Volts.
I called Westco Tech and they claim that 14.6 Volts, while engine is running, represents the High and is Acceptable.
I thought I'd ask Miata Group to see if there is any other opinion/ experience.
Also, if its too high, is there a way to adjuct the Voltage, from Alternator, DOWN?