They are ubiquitous in modern turbo engines: intercoolers. The working principle of this air/air or air/water heat exchanger can be neatly summarized in a few sentences: when the engine charge air is cooled, at a constant air volume, it contains a greater number of oxygen molecules which are available for exothermal reaction with the fuel.
They are ubiquitous in modern turbo engines: intercoolers. The working principle of this air/air or air/water heat exchanger can be neatly summarized in a few sentences: when the engine charge air is cooled, at a constant air volume, it contains a greater number of oxygen molecules which are available for exothermal reaction with the fuel. Thus the lower the temperature of the charge air, the greater the power that can be developed during combustion. This means that turbocharging efficiency can be optimized by more efficient intercoolers.
With the help of meaningful temperature, efficiency and torque diagrams, HG-Motorsport performance specialists with more than 20 years of experience in the development and manufacture of intercoolers under their belt now emphasize the efficiency of the air/air intercoolers they have developed for the in-house HF-Series. This series may use an HGIVVAG21/HGIVVAG21-V2 intercooler for 1.8 and 2.0 T(F)SI engines, for example, providing impressive propulsion for various models of the Audi, Seat, Skoda and VW brands.
Thanks to their flow-optimized construction and a production process based on high-grade Bar’n’Plate radiator blocks and shell tanks with WAY FIN TECHNOLOGY, HGIVVAG21 intercoolers in the HF-Series provide for a perfect flow and a uniform pressure distribution thanks to their outstanding cooling characteristics. They thus guarantee optimal performance even under “stress conditions”. The radiator block area works out to be around 70 percent more than in the case of directly comparable OEM intercoolers.
The result: when simulating a high-speed drive on the highway or a sustained burst on the race track, for example, using three sequential performance measurements on a roller chassis dynamometer, temperature curves demonstrate impressively that the charge air temperature after installation of a HGIVVAG21-V2 cooler remains well below 30 celsius throughout the course of measurements, while the charge air temperature in a vehicle equipped with an OEM intercooler increases sharply, going up to around 60.
A comparison of the test measurements for a performance-enhanced VW Golf 7 GTI with an OEM intercooler versus an HF-Series intercooler (HGIVVAG21) highlights the consequences of these temperature differences: in every third test run, the GTI with the HF-Series intercooler saw power of 407 hp at 6000 rpm as against 378 hp with the OEM cooler, an increase of 29 hp.
While the latter even loses power with further increases in speed, the 2.0 liter TSI engine with HF-Series intercooler continues to show improved performance, and its performance advantage even climbs to 46 hp at 7000 rpm. A similar picture emerges for torque: the increase in torque when using the HF-Series intercooler is 34 Nm at 6000 rpm and 51 Nm at 7000 rpm. An impressive proof of the performance advantage obtained using the HF-Series intercooler.