Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
For Most People, The Only Alternator Rating They Are Familiar With Is The Amperage Rating. Alternators Are Spoken Of As A 65 Amp Or 100 Amp Alternator. When Replacing The Alternator On The Family Car, This Is Probably The Only Information That Is Necessary. After All, All One Needs Is An Alternator That Matches The Original. When Building A Custom Car From The Ground Up However, A Deeper Understanding Of The Power Curve Of An Alternator Is Required. Usually A Custom Pulley Or So-Called 'Power Pulley' Set Is Used With A Performance Alternator. A Mismatched Pulley Ratio And Alternator Will Spell Trouble, Especially At Idle Speeds Where Alternator Performance Is Critical. To Avoid This, It Is Important To Understand The Alternator'S Capability At Slow Speeds. An Alternator'S Output Is Dependent On Speed, But This Can Be Deceiving Because This Output Is Not Linear. Instead, It Follows A Curve. Each Alternator Has A Unique Curve, And At Idle Small Changes In The Alternator'S Speed Can Make A Big Difference In Its Output Capacity. Because Of The Preceding, Pulley Ratios Are Very Important, Especially When Using High Amperage Alternators. The Pulley That Are Supplied With The Alternator Are Matched To The Winding And Power Curve. It Is Important That Any Dress Up Pulley Sets Do Not Deviate From This Ratio. Typically, A Street Driven Car Should Have A Pulley Ratio Of At Least 3:1. If The Vehicle Has An Automatic Transmission With A Low Idle And The Vehicle Spends A Lot Of Time Cruising, Then A Higher Pulley Ratio - Perhaps 3.5:1 - Should Be Used. Alternators Can Take High Speeds Up To 20,000 Rpms For Short Periods, So Overdriving The Unit Is Not A Problem. The Output Of High Amp Alternators Can Drop Off Substantially Under 2400 Rotor Rpms. Therefore, Powermaster Does Not Recommend Power Pulleys With High Amp Alternators. Powermaster Uses A State-Of-The-Art Computer Alternator Dyno To Measure The Performance Of Each Alternator We Manufacture. Output Curves, Engine Idle Speeds, And Alternator Pulley Ratios Are Carefully Considered To Assure Good Drivability At Idle And Slow Cruising Speeds.
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
Frequently Asked Questions
Q: What are the dimensions of the Powermaster 682378 alternator?A: The dimensions are nine point zero two inches in length, seven point five two inches in width, and seven point five two inches in height.
Q: What is the amperage rating of the Powermaster 682378 alternator?A: The amperage rating is two hundred twenty amps, ideal for high-performance applications.
Q: What is the model number of this alternator?A: The model number is six eight two three seven eight, specifically designed for GM vehicles.
Q: How do I install the Powermaster 682378 alternator?A: Installation requires matching the pulley ratio to your vehicle's requirements, ensuring proper alignment and secure connections.
Q: Is this alternator suitable for custom car builds?A: Yes, it is designed for custom applications, especially where a better understanding of alternator performance is necessary.
Q: How do I maintain the Powermaster 682378 alternator?A: Regularly check the pulley alignment and ensure the connections are tight to maintain optimal performance.
Q: What should I do if my alternator stops working?A: If it stops working, check for loose connections and test the pulley ratio to ensure they meet specifications.
Q: Does this alternator come with a warranty?A: Yes, it typically comes with a limited warranty, but check the manufacturer's policy for specific terms.
Q: Can I use a power pulley with this alternator?A: Powermaster does not recommend power pulleys with high amp alternators like this one, to avoid performance issues.
Q: What is the output capacity at idle speeds?A: Output capacity drops significantly under twenty four hundred rotor RPMs; hence proper pulley ratios are crucial.
Q: Is the Powermaster 682378 alternator safe for high speeds?A: Yes, it can handle high speeds up to twenty thousand RPMs for short periods without issues.
Q: What materials is the Powermaster 682378 alternator made from?A: The alternator is constructed with durable materials designed to withstand high performance and temperature.
Q: How does this alternator compare to a standard one?A: This alternator offers a greater output-to-weight ratio and is race-inspired, making it superior for performance applications.
Q: What kind of vehicles is this alternator compatible with?A: It is primarily compatible with GM vehicles, tailored for performance upgrades.
Q: What if the alternator arrives damaged?A: If it arrives damaged, contact customer support immediately to initiate a return or exchange process.
Q: How can I ensure proper performance of the alternator?A: Ensure proper installation, maintain correct pulley ratios, and monitor the alternator's performance regularly.