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Charge Cooler
A Charge Cooler and a Charge Air Cooler (CAC) serve similar purposes but are not exactly the same. Both are used in turbocharged engines to cool compressed intake air before it enters the engine. However, the key difference is in how they transfer heat.
Charge Air Cooler (CAC): Air-to-Air Cooling
Uses ambient air to cool the compressed intake air.
Works like a radiator: Hot charge air flows through a network of tubes while outside air passes over them, dissipating heat.
Commonly found in trucks, diesel engines, and high-performance vehicles due to its simplicity, reliability, and efficiency.
Charge Cooler: Air-to-Liquid Cooling
Uses coolant (water or a water-glycol mix) instead of ambient air to remove heat.
Functions like a small radiator with a heat exchanger, where coolant absorbs heat from the charge air and is later cooled by a secondary radiator.
Often used in high-performance sports cars, marine engines, and industrial applications where space is limited or where air-to-air cooling is less effective.
Sometimes referred to as a Water-to-Air Intercooler.
Which One is Better?
Air-to-Air Charge Air Coolers (CACs): More durable, lower maintenance, and work well for continuous, high-load applications like trucks and diesel engines.
Charge Coolers (Air-to-Liquid Intercoolers): More compact, better for high-performance applications, and provide faster cooling, but require a coolant system and pump.
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