1973-1976 Corvette Direct Fit® Brushless Combo

Radiator

The most powerful cooling combination available for the third generation Corvette, or C3. This radiator and fan pairing provides the highest heat rejection package ever created. A traditional DeWitts Pro-series aluminum radiator with two rows of 1.0" wide cooling tubes provides a 25% increase in radiator cooling performance alone. Then mate an industry exclusive 500-watt SPAL brushless fan to the radiator using DeWitts aero inspired injection molded shroud and you have unmatched cooling power and performance.

The new SPAL brushless fans were developed and designed with cutting edge technology, high energy ferrite magnets, and a state-of-the-art sine wave sensorless drive. These motors reach more than 82% electrical efficiency, placing the 500-watt power range products among the most efficient motors anywhere. The result is high air-side performance at minimum electrical load. These brushless motors are fully sealed to be IP68 and IP6K9K compliant and can operate in the presence of many aggressive or hazardous substances.

Fitment Note: Some late 1976 models use the 1977 style radiator. Please check prior to ordering. The core for the early 1976 radiator should be 27.5” wide and the inlet barb should have a curve in it.

Radiator/Fan Combos:

32-5139073M (Pro Series Direct Fit®, natural finish, manual trans)

32-5139073A  (Pro Series Direct Fit®, natural finish, auto trans)

32-5239073M (Pro Series Direct Fit®, Black Ice finish, manual trans)

32-5239073A  (Pro Series Direct Fit®, Black Ice finish, auto trans)

LS Swap Combos:

32-7139073M (Pro Series Direct Fit®, natural finish, no cooler)

32-7139073A  (Pro Series Direct Fit®, natural finish, auto trans cooler)

32-7239073M (Pro Series Direct Fit®, Black-Ice finish, no cooler)

32-7239073A  (Pro Series Direct Fit®, Black-Ice finish, auto trans cooler)

Radiator Specs

Fan

Brushless Fan Standard Features

• PWM and analog input for continuous adjustment of fan speed.
• Open collector diagnostic output.
• Meets EMC directives: 2006/28/EC.
• Low weight motor.
• Higher ambient working temperature.
• Protection against:
• Overheating
• Overheating
• Overcurrent and overvoltage
• Mechanical overload
• Locked rotor
• Load dump

Brushless Fan Advanced Features

• High efficiency and low power consumption.
• Low noise, vibration, and harshness.
• Electronic controls with on-board diagnostics.
• Motor with integrated electronics.
• Battery compensation system.
• Proprietary sine-wave sensorless drive (SPAL-patent).
• Low inertia inner rotor design.

Fan Specs