Electric Turbos Are Here — Is It A Good Thing?

Summary by Krater

A review and technical explanation of electric turbochargers in the Porsche 911 Turbo S (992.2), exploring how they work, their advantages and disadvantages, and what they feel like to drive compared to traditional turbochargers.

From the video

Answers: How do electric turbochargers work in the Porsche 911 Turbo S, and what are their pros and cons?

• Electric turbochargers
• Porsche 911 Turbo S (992.2)
• Turbo lag reduction
• Energy recuperation in turbochargers
• Emissions improvement with electric turbos
• Torque curve optimization

What it concludes

• Electric turbochargers significantly reduce turbo lag, reaching peak boost 2 seconds faster than previous variable turbine geometry turbos at 1500 RPM.
• eTurbos enable a wider, flatter torque curve across the entire RPM range by supplementing low RPM boost.
• eTurbos eliminate wastegates entirely by using the electric motor to act as a brake on the exhaust gas and regulate boost pressure.
• Energy recuperation allows the eTurbos to act as generators off-throttle, sending energy to the traction motor or high-voltage battery.
• Electric turbos increase maximum system power to 701 horsepower, adding 30 horsepower compared to the engine alone.
• The eTurbo system improves emissions by allowing the use of a larger, less restrictive turbocharger that maintains stoichiometric air-fuel ratios (Lambda = 1) across more driving scenarios.