Technical Bulletin

Belt size and tension:

A smaller diameter pulley is normally supplied unless otherwise stated to ensure you receive the maximum idle output. A shorter belt is usually required unless your belt tension can accommodate. If you need to know what size belt, we recommend using a “kite string” and wrap string along belt path, then take this measurement to your local auto parts store where they can provide you the exact size needed for your vehicle.  Ensure you belt tension is tight as well. Slippage of a loose belt will cause alternator not to function properly.

Big 3:

Switch out or addition to the below 3 cables using 1/0 cables:

Alternator positive cable that runs to the positive terminal of the battery

Negative battery cable that runs from the battery to the vehicles chassis

Chassis grounding cable that runs to the engine block

Big 4:

We recommend adding a 4th ground cable which runs from the clean part of the alternator casing (aluminum exposed) to vehicles chassis for increased voltage output. Some powder coated units will see a low voltage or NO voltage until an extra ground cable is added. We have seen some cases where 2 ground straps to alternator have benefited some.

Powder coated units:

Powder coat on alternators is a “ground killer”. Most assume the alternator is not working if above has not been completed properly. Proof of voltage and amperage output was sent to show that we shipped you a functioning alternator. If your unit is not charging or has LOW voltage, you need to verify that you did the above steps correctly. Most of the time, we find that a step was skipped such as the extra ground from ALTERNATOR TO CHASSIS ground so added an extra ground option “S” = SECONDARY GROUND.

Charging low voltage or NOT Charging once installed:

See “Big 4” and Belt size and tension.


Testing your alternator to verify output:

If you do not have a Clamp meter for voltage or amperage testing, please purchase one. They are very inexpensive and safest way to test voltage and amperage of your alternator. Please DO NOT disconnect your alternator from battery while car is running to test your alternator. This is the quickest way to do damage to your newly installed unit (and we can tell).

Self Energizing Alternators / 1 Wire alternators:

If you ordered your alternator as a self energize or 1 wire, please remember that you no longer need to use the cars harness that was once plugged into your old alternator. This harness can be “tucked” away. Only connect positive battery cable to positive post on alternator and you are ready to go.

Voltage bypass or PCM/ECU bypass:

Unless otherwise quoted or instructed, our units come supplied with the maximum output for voltage and amperage built into the alternator. Voltage settings quoted are already built into the Voltage regulator inside the alternator. A reminder that PCM and ECU type vehicles means that your vehicles “brain/computer” controls the voltages. If you are looking to bypass your PCM or ECU control, those options are available for you to do with resistors and can find simple steps online or by emailing us for assistance.

Technical assistance:

If you need any technical assistance, please call us first. For some reason, people seem to want to ask total strangers on social media about others products for help. Let US help YOU. A simple telephone call, email or message helps us to work with you best.