PEWTRESS, NATHAN JAMES III City/State: St George / UT PCF Number: 195766 Arrest Date: 19:22:00 02/01/18 Agency: St George Police Department RELEASED FROM CUSTODY
then you need a little more rpm to get the alternator to charge above the battery voltage. About 13.5 volts. The average alternator is now between 1,300 to 2,100 rpm. I set up an old 35 amp alternator to run off a 1/3 hp 1,750 rpm washing machine motor at a 1:1 belt ratio. Using the stock regulator would stall the 1/3hp motor. I put a large adjustable resister on the field connection of the alternator.
This is a function of the ratio between the crankshaft pulley and the alternator pulley. Certain modified engines can have engine idles ranging between 600 to 1,500 rpm and red lines of over 8,000 rpm. These rpm, along with the pulley ratio, directly affect an alternatorâs performance and life expectancy. An alternator has a normal range of operation. Most alternators need to spin at about 2,400 rpm at idle, have their maximum output above 6,000 rpm, and should never exceed 18,000 rpm. So, how do you know how fast your alternator is spinning? The first step is to understand how the pulley ratio affects the alternator.