What does SI mean in alternator?
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What does SI mean in alternator?
The “SI” in the model number stands for Systems Integrated, meaning that the voltage regulator is inside of the alternator.
What’s the difference between a 10 Si and a 12 Si alternator?
Out back, a 12SI has much larger cooling vents than a 10SI, and a 10SI has more cooling vents than an older DN-series alternator. Besides having a higher amp output, SI-series alternators also begin charging at much lower engine rpm (which is beneficial when cruising, for example) than older-style alternators.
What is a GM SI alternator?
The 10SI GM style alternators have a custom voltage regulator that lets the alternator be used as a 1-wire alternator or can be factory wired using the OEM plug. Available in a variety of finishes, these alternators output 100 or 140 amps. Every Tuff Stuff alternator is hand built and load tested in Cleveland, Ohio.
What are the 3 wires for on a alternator?
The circuit comprises three main wires: battery positive cable, voltage sensing wire, and ignition wire. The ignition input wire is attached to the engine. It conducts electricity from the engine to the alternator while the voltage detecting cable senses the voltage and is attached to the rectifier.
How do I tell what kind of alternator I have?
Look for a diagram under or near your fuse box cover. It will have individual amperage numbers (sometimes along with volts) already set by the manufacturer. Add up those numbers to find what amperage your alternator needs to feed the car’s electrical system. Verify this number with the part manufacturer, if necessary.
How do you size an alternator?
As a rule of thumb, 12-volt alternators use one horsepower for every 25 amps of output, or to put it another way, their ratio of output to horsepower load is 25:1. So, when selecting a new alternator, you need to size it for the limits of the capacity of its drive belt.
How many amps is a GM alternator?
JEGS 1-Wire GM Alternator | 140 Amps Output | Made In USA | Chrome Finish | Includes Single Groove V-Belt Pulley, And Turbo Fan | Internal Regulator | 12 Volt | GM 12si.
What does clock mean on an alternator?
Clocking refers to the posi on of the back alternator case to the front case. The 7127 10SI alternators can be clocked at 3, 6, 9 or 12. That means that the posi ve terminal, the OEM electrical plug and the various moun ng bracket bosses could be in one of 4 posi ons rela ve to the front case.
Is a higher amp alternator better?
That is, your alternator will only supply the amount of amperage a particular component demands—and no more. So high-output alternators will not harm your components or charging system, no matter how high you go with the amps.
How do I match my alternator to my battery?
Your alternator should be capable of delivering rated output equal to the maximum acceptance rate of your house battery bank. In other words, the alternator’s rating should be equal to 25 percent (lead acid) 30 percent (gel) or 45 percent (AGM) of your total battery capacity.
