Technical Data – HD Cooling System, SC627

The following includes an account of a test session conducted by Callaway engineers during validation of the Callaway HD Cooling System. This data illustrates the improved performance provided by the HD Cooling System, compared to the Chevrolet OEM cooling system configuration.

Test Conditions:
Date: 9/24/2020
Dry Bulb Temperature: 85º F
Wet Bulb Temperature: 72º F
Barometric Pressure: 29.43 in Hg
Test Vehicles: Production 2019 Callaway Corvette Stingray (2)
Test Facility: Thompson Speedway Motorsports Park, Thompson CT (1.7 mi road course)

Test Procedure:
All test data starts at T0, when the vehicle reaches 20 mph at the pit exit, entering the track.

The Callaway Corvette SC627 equipped with the stock Corvette cooling system configuration was driven until coolant and oil temperatures reached unsafe limits. At that point, the driver had to terminate the test. The vehicle was only able to be driven hard for less than six (6) minutes before having to stop the test and take cool-down laps. The engine coolant temperature became the limiting factor. It climbed so quickly that neither engine oil temperature nor manifold air temperature were able to reach acceptable operating temperatures before the test had to be suspended. The Callaway Corvette SC627 with the Level 2 (LV2) HD Cooling System could be driven for the full session without having to slow down or stop due to excessive engine operating temperatures. The graphs shown below illustrate that these temperatures stabilized early into the test and then remained at a steady, safe level for the entire duration of the session.

The slope of the ECT (coolant), EOT (engine oil), and MAT (manifold air) curves recorded with the stock Chevrolet cooling system configuration were much steeper than the graphs recorded with the the HD Cooling System, indicating how quickly the car without the Callaway HD Cooling System overheated.

The Manifold Air Temperature graph below illustrates the significant reduction in temperature of the air entering the engine when testing with the HD Cooling System. Cooler, consistent inlet air temperature allowed increased, non-diminishing power throughout the entire session.

The Vehicle Speed graph below shows the type of road course used, with a large variety of fast corners, slow tight sections, and a long high speed straightaway.

The Engine RPM graph indicates that each vehicle was loaded exactly the same during the test session, and driven equally as hard by the same, professional driver.

Technical Data – HD Cooling System, SC757

Engineering Test Report – SC757