Porsche 911 High Output 150A Alternator

Porsche 911 High Output 150A Alternator

SKU: 85115000



The Classic Retrofit's upgrade high-output alternator for the classic Porsche 911


Full product information below 


  • Product Information

    This is Classic Retrofit's upgraded high-output alternator for classic Porsche 911s. 


    Tested at over 145A amps on the standard 911 pulley and belt and with a simple installation process, this UK-manufactured upgrade is the highest output alternator available for your classic Porsche 911.  The idle output is in excess of 75A!


    This is a brand new unit, not reconditioned and there is no core charge or exchange.  Based on the Denso 6 phase 'hairpin' alternator, the casing has been custom designed to fit all 911 fan housing from 1965 to 1989.  The alternator offers superior efficiency and produces less heat than the original units.


    This is not a 'rewound' Bosch or Valeo unit.


    With so many electrical upgrades pushing old-school charging technology to the limit, Classic Retrofit's upgraded alternator for classic Porsche 911s is the perfect addition to a modern-day classic. 


    Used in conjunction with our electric A/C, this alternator offers higher levels of cooling without compromising battery voltage.


    Fitting to our 911SC demonstrator led to an instant increase of almost 10% in charging voltage. This may not sound like much, but it is huge in voltage terms: even half a volt can transform headlamp brightness, starter efficiency and battery health. For cars running additional electrical items such as bigger stereos and additional lighting, this is a game changer. 


    The alternator is a direct fit for early cars up to 1973.  Mid-year and later 911s require a machined spacer, sold separately.


    Alternators come complete with heavy duty cables.


    Download Alternator Installation Guide