{"product_id":"high-output-alternator-for-mazda-rx-7-1984-1985-1-1l-1-3l","title":"High Output Alternator for Mazda RX-7 (1984-1985) 1.1L 1.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Output 130-Amp Alternator for 1984-1985 Mazda RX-7 (FB)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 130-amp high-output alternator replaces the low-output factory charging unit on the 1984-1985 Mazda RX-7 to eliminate idle voltage drop and supply consistent electrical current to demanding ignition and fuel components.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mazda RX-7 Charging System Limitation\u003c\/h3\u003e\n\u003cp\u003eFactory charging systems on the first-generation \u003cstrong\u003eFB\u003c\/strong\u003e RX-7 were engineered to supply a modest 50 to 60 amps. In modern driving conditions, upgraded electric radiator fans, aftermarket high-pressure fuel pumps on fuel-injected \u003cstrong\u003e13B\u003c\/strong\u003e setups, and auxiliary audio equipment quickly exceed the stock charging envelope. Operating near 100% duty cycle introduces severe rotor heat soak inside the compact Wankel engine bay. This thermal stress degrades internal OEM rectifiers and causes heavy voltage drops below 12 volts at idle, resulting in weak spark energy, inconsistent injector dead times, dim headlights, and battery drain.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eManufactured in the USA, this 130-amp upgrade delivers more than double the electrical capacity of original factory units like \u003cstrong\u003eN249-18-300\u003c\/strong\u003e and \u003cstrong\u003eN304-18-300\u003c\/strong\u003e. Built with heavy-gauge pure copper stators, premium avalanche diodes, and high-temp balanced rotor bearings, this alternator maintains steady 14.2 to 14.6-volt output across the entire rev range. The housing maintains direct bolt-in fitment to the factory brackets on both the carbureted \u003cstrong\u003e12A\u003c\/strong\u003e and EFI \u003cstrong\u003e13B\u003c\/strong\u003e platforms, restoring electrical reserve margin and keeping vital ignition components saturated under hard driving.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x 130-Amp High Output Alternator\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1984-1985 Mazda RX-7\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e12A, 13B \/ FB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e101 - 135 hp \/ 107 - 133 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e334-1759, RM3626, N249-18-300, N304-18-300, A5T40374, 14700N, 14700\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1984-1985 Mazda RX-7 1.1L (12A Rotary)\u003c\/li\u003e\n  \u003cli\u003e1984-1985 Mazda RX-7 1.3L (13B Rotary)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the FB RX-7?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1984-1985 Mazda RX-7 equipped with the \u003cstrong\u003e12A\u003c\/strong\u003e or \u003cstrong\u003e13B\u003c\/strong\u003e rotary engine.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to upgrade the primary charging wire?\u003c\/h4\u003e\n\u003cp\u003eInstalling a 4-gauge fused alternator-to-battery charge cable is strongly recommended to safely carry the increased 130-amp output without overtaxing original factory harness wiring.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mazda Rotary Caliber\u003c\/h3\u003e\n\u003cp\u003eHigh-RPM Wankel engines demand clean, uninterrupted electrical current to ensure uncompromised leading and trailing ignition firing intervals across the powerband.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67565744161016,"sku":"DS-E1INFP32B","price":317.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/high-output-alternator-for-mazda-rx-7-1984-1985-1-1l-1-3l-1.jpg?v=1791073292","url":"https:\/\/performancechiptuning.com\/fr\/products\/high-output-alternator-for-mazda-rx-7-1984-1985-1-1l-1-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}