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Originally Posted by Bighead  Come to think of it, I can't quite understand the entire series of 3-valves engines.
They can truly rev and run pretty smooth, but just can't deliver the torque.
Welcome back, 4-valves! |
3-valve technology allowed the catalytic converter to reach its optimum operating efficiency temperature 12 seconds earlier than in a 4-valve design, hence less emissions. That's the reason MB went with 3-valve technology. The addittion of twin spark plugs per combustion chamber had the added benefit of a cleaner combustion yielding more torque and decreasing fuel consumption.
I got this information from one of my many Mercedes-Benz Bibles at home.
