When factory engineers design an intercooler system for a turbo-charged engine, the main focus is supporting set horsepower and torque figures over a wide range of driving and environmental conditions. When boost levels are increased, such as by adding a chip, the stock intercooler becomes less efficient. In an effort to return the system to OEM or greater efficiency levels, we tested an aftermarket intercooler.

Baseline
Peak wheel-hp: 202 @ 4874 rpm/peak wheel torque (lb-ft): 242 @ 3030 rpm

Vehicle Data
Transmission: DSG
Mileage: 14,813
Testing Octane: 91

Current Modifications
Neuspeed P-chip
Milltek 70mm turbo-back exhaust with 200-cell metallic HJS catalytic convertor
Forge vacuum-operated bypass valve
Neuspeed High-Flow Turbo Discharge

Dyno Data
Dyno Type: Clayton chassis aka 'Mustang'
Temperature: 78 to 86 degrees F
Humidity: 24.7 percent
Transmission Test Gear: third

Notes: Graphs were compiled with data gathered from the factory sensors using VAG-COM diagnostic software from Ross Tech. As well as diagnosing problems, VAG-COM software allows the engine to be monitored. The 2007GTI requires a CAN interface, from $249.

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