1993 Chevrolet Corvette Owner's Manual - Page 76

lnsert the Engine Power Key into the slot and turn claclnvise to FULL. An indicat0r"lightwill come on when FULL power performanceis operating. To return to-NORMALpower, turn key countercloclnvise. The indicator light should stop glowing.The key returns to the center position when released. The key can be removed whenthe engine is inPULL or NORMAL power and only from the center position. The FULL power setting provides additional power for highway touring and off-road sports use as well as reserve power for passing. Both primary and secondary fuel intake runners and injectors can operate whenthe FULL setting is chosen. I When the ignition is shut off, the engine reverts to NORMAL power. Your ZR-1 is capable of operating at FULL power whenthe indicator light is on and u.nder the following conditions: The engine coolantand oil temperatures are greater than 68°F (200Cc)but less than 3OFF (150°C), and -The system voltage greater than 10 is volts, and There is no SERVICE ENGINE SOON light indicatedon the Driver Infomation Center. Switching from the NORMAL to the FULL setting andfrom the FULL to the NORMAL setting may be done at engine speeds up to 4,000 rpm. ZR-1 Toll-Free Number: If you have any questions or concerns about yourZR-1 Special Performance Coupe, call the following toll-free telephone number ,assistance: for 1-800-222-1020 (U.S. only). 75