Welcome Offer : Use Code WELCOME5 for 5% OFF your first order!
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Welcome Offer : Use Code WELCOME5 for 5% OFF your first order!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF your first order!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF your first order!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF your first order!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF your first order!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF your first order!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF your first order!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF your first order!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF your first order!
Free Shipping Across USA
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 is the amperage rating of the Powermaster 77611 alternator?A: The Powermaster 77611 alternator has a rating of 140 amps, making it suitable for high-performance applications.
Q: How does the pulley ratio affect the performance of the alternator?A: The pulley ratio is crucial for ensuring optimal alternator performance, especially at idle speeds. A typical street-driven car should have a pulley ratio of at least 3:1 to maintain efficiency.
Q: Can I use this alternator with a custom pulley set?A: Yes, you can use a custom pulley set, but it is essential that the ratio does not deviate from the alternator's specifications to avoid performance issues.
Q: Is the Powermaster 77611 suitable for racing applications?A: Yes, the Powermaster 77611 is race-inspired, featuring a great output-to-weight ratio, making it a suitable choice for racing and performance vehicles.
Q: What should I consider when installing the Powermaster alternator?A: When installing the Powermaster alternator, consider the vehicle's idle speed and ensure the pulley ratio matches the alternator's power curve to ensure optimal performance.
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