Usage:
3406C (3ZJ) Truck Engines
There have been some performance complaints on 1992 and 1993 model year 415 and 425 hp ratings. These complaints, in most cases, were tied to engine response rather than actual engine horsepower. Caterpillar now has new EPA certified FRC settings for the 425 hp standard torque rating for 1992. There are also new EPA certified FRC settings for the 1993 415 hp standard torque rating and the 425 hp standard and high torque ratings. These new settings are included in the chart that follows. These setting changes will improve the 1200 rpm engine speed turbocharger response by fifteen percent. Under some operating conditions, the setting changes will improve the 1000 rpm engine speed turbocharger response by thirty to forty percent. An engine with perceived low power or poor response may have the FRC settings changed to the new values.
