[source: APR LLC]
The APR Intercooler System is a massive front mounted upgrade that dramatically reduces intake air temperature (IAT), minimizes heat soak, and provides increased performance! The system is an easy to install, direct bolt-on design, that is recommended at every stage of performance.
- Dramatically lowers intake air temp (IAT) – Increases HP while minimizing power-robbing heat soak!
Dynoed 26 AWHP over to the factory system (STG 1 93)!
Effective cooling for more than double factory horsepower levels!
- Massive frontal surface area and core volume
6.38″ x 25.33″ x 3.16″ – 161.6 in² frnt. & 510.67 in³ volume – OEM
11.7″ x 22.00″ x 3.50″ – 257.4 in² frnt. & 900.90 in³ volume – APR
- Highly effective core design – Bar-and-plate core with staggered and louvered fins.
Rigorous testing determined core style, fin density, and size.
Low pressure drop + highly effective cooling = high performance!
- Smooth cast end tanks – Engineered for low turbulence/restriction and maximum flow.
Organically shaped to promote airflow across entire core.
Pressure tested to prevent power robbing boost leaks.
- Easy to install – Simple plug-and-play design with no trimming or drilling necessary!
- Designed by engineers with lasers – With the best equipment and smartest engineers, it just works!
APR’s engineers tested each intercooler in a multitude of tests to show the impact the APR intercooler has on intake air temperature. The following tests were conducted with a 2018 RS3 using our APR Stage 1 ECU Upgrade, 93 octane fuel and no other modifications. Ambient conditions during the stock intercooler tests were 78.5°F and 98.06 kPa with 60.47% relative humidity. Conditions were far worse later in the day during during the APR Intercooler testing with 87.2°F and 98.03 KPa with 42.18% relative humidity. This gave the APR Intercooler no added advantage over the stock system during the tests.
First, six back-to-back dyno pulls were conducted with each intercooler. Each run was conducted in 4th gear, from idle to redline, with a cool down between runs. The stock intercooler failed to combat rising IAT’s and quickly exhibited power-robbing heat soak. IAT’s started at 42°C and quickly rose to 58°C by the end of the first dyno pull. This trend continued with the final dyno pull reaching a staggering 70°C! In contrast, the APR Intercooler started at the same temperature and only reached 44°C by the end of the first dyno pull. It was then able to continue rejecting heat, only reaching 54°C by the end of the final dyno pull. The APR Intercooler performed better after 6 back-to-back dyno pulls than the factory intercooler did on it’s very first dyno pull.
Next we tested a 15-second sprint through the gears. With the factory intercooler, IAT quickly rose from a starting temperature of 37°C to a blistering 64°C! However, as expected, the APR intercooler handled IAT’s extremely well. With a starting temperature of 38°C, IAT dropped to as low as 33°C before slightly climbing above the starting temperature to 40°C by the end of the sprint. A difference of 23°C was exhibited between the two units after only a single 15 second sprint. This directly translates to faster acceleration, and better performance in all conditions.
The temperature difference between the stock and APR intercooler directly translates to more horsepower. Comparing best vs best, worst vs worse, and average vs average dynos from both systems, the APR Intercooler laid down 26 AWHP over stock in every scenario. This is easily one of the best dollar-per-horsepower hardware modifications one can make on this platform and highly recommended for anyone at any stage!
Unfortunately, to the untrained eye, many intercooler designs appear the same. However, effectiveness of the system and overall performance are greatly determined by several key metrics. Alloy selection, end tank design, construction type, fin style, fin density and overall core dimensions must be analyzed and balanced accordingly to deliver class-leading performance. While the OEM’s goal is to create a lightweight, easy to manufacture and inexpensive to produce, cross-platform design capable of supporting factory power levels, APR’s intercooler must be capable of supporting more than double the factory output. Achieving this goal took a multi-step approach focused around intercooler core selection, end tank design and install location.