In the sound-proof and bullet-proof test cell at Hirsch Performance, the Saab engines are taken to their extremes. The worst possible ambient conditions are simulated by regulating temperature and pressure of 
intake air to simulate desert heat or high altitude alpine passes. Computer-controlled water and charge air cooling systems are used to simulate poor cooling as enocuntered for example in traffic jams at high temperatures. During these extreme tests, the engines are closely monitored to ensure that no critical components such as cylinder head, catalyst or turbocharger become overheated, overstressed, or overspeeded, while keeping a close eye on emission levels so that they are not exceeded.
But it is not enough that an engine performs well under controlled conditions. All Hirsch performance upgrades are therefore test driven on the German Autobahn at steady state at top speed to ensure that the performance is really there when it matters, and that the integration in the car works as it should.
Then, to validate the durability, the upgraded engines are driven at full load at various RPMs according to a predefined test cycle. The durability test runs at full throttle around the clock for a month, stopping only to change oil at the regular service intervals. Thereafter, the engines are dismantled to check for fatigue, wear and other damage. So, as an owner of a Hirsch Performance Saab, you can rest assured that your engine has the durability it takes.
Meanwhile, the upgrades are driven by several test drivers to ensure that the driving experience, the torque curves and pedal response feel just right. Because in the end, a performance upgrade from Hirsch Performance is more than just added horsepower.
A Hirsch Performance upgrade is built for a reason – to give you the ultimate Saab driving experience.
