The later gen MR2 electric power steering pump incorporates a motor controller that can vary the pump speed based on an ABS wheel speed sensor. And there isn't any reason you can't still use the OEM pulse width modulated steering rack solenoid to control the amount of power assist based on road speed
:If you want simplicity.. just get the manual rack.. it is geared differently and not like driving a ps car without ps. its alot more smooth. :flaming river has one that is used for our cars