Ulrich Baretzky: “The fans will enjoy hearing the sound a four-cylinder engine can produce”

  • The Head of Engine Development talks about the new DTM turbo engine
  • Compact dimensions, low weight and fascinating sound
  • Extremely low specific consumption in spite of high engine power

Ulrich Baretzky, Head of Engine Development at , is convinced that the new four-cylinder turbo engine is the right move for the DTM.

Did the development of the new DTM engine go smoothly?
The four-cylinder engine per se is not a simple engine. Above all, it’s very vibration-intensive. You have to rethink things that principally used to work without any problems. We did have a few concerns in that respect, but managed to get a handle on them by putting in a great effort and a lot of hard work.

Why is tuning a turbo engine more complex than tuning a naturally aspirated one?
You have more adjustment options such as charge pressure, charge air temperature and adaptation to the respective environment. Extracting the maximum from the engine is not more difficult, but more complex. In addition, the engine has a relatively high compression ratio, which makes it more susceptible to knocking.

For the first time, there will also be a push-to-pass function in the DTM. What impact did this function have on the development?
The engine was originally designed to deliver some 600 horsepower. Now, another 30 horsepower is added for a specified period of time. This massively increases the overall load, even though it’s just for a limited duration.

What can the drivers look forward to?
Drivers per se are always interested only in power and torque. The engine has plenty of that. However, they also immediately noticed that driving the turbo engine is slightly different from the naturally aspirated engine and that the car is more agile due to the lower vehicle weight. Plus, the engine is very spontaneous, quickly revving up to 9,500 rpm. I can well imagine that this is fun.

Will the fans have fun, too?
The fans will enjoy hearing the sound a four-cylinder engine can produce and not miss the eight-cylinder ones. In the first test in Estoril, I was immediately impressed about how good and aggressive the turbo engine sounds. It’ll be an absolute spectacle.

The new DTM engine has an anti-lag system (ALS). What is an ALS?
An ALS helps eliminate turbo lag. In the deceleration stage, in other words when the driver approaches a turn and brakes, the turbocharger is artificially kept spinning. When the driver accelerates again after the turn, he’ll immediately have charge pressure.