Not only do the PMGR starters work hard and long...they require less amperage from the battery to do it.
The bigger, "High Torque" direct-drive starters would pull 190--200 amps, as much as 225 on certain Big Block engines (Olds 455, for example.) These are "stock" engines, not high-compression monsters.
The PMGR starters pull about 150 amps, more-or-less.
The higher RPM of the electric motor makes for more back-EMF, and there's no electric current going through field coils, because the "field" is now a permanent magnet not an electromagnet. Both factors reduce amperage draw.
The bigger, "High Torque" direct-drive starters would pull 190--200 amps, as much as 225 on certain Big Block engines (Olds 455, for example.) These are "stock" engines, not high-compression monsters.
The PMGR starters pull about 150 amps, more-or-less.
The higher RPM of the electric motor makes for more back-EMF, and there's no electric current going through field coils, because the "field" is now a permanent magnet not an electromagnet. Both factors reduce amperage draw.