As with the modern versions the idea is the rest of the cylinders
would engage as soon as the accelerator pedal was depressed in order to ensure
the additional power would be there and any perception of the change from 4-8
cylinders would be slight.
Problems with the engine came from the start, the fact this
6ltr engine only produced 140bhp on all 8 cylinders was just the first when put
in some very heavy metal. The next was the micro-computer technology that was
needed to control it, a new and challenging technology at the time, that controlled
the solenoids that lifted the rockers to shut the cylinder off. The problem was
the reaction time to reopen them up was slow and not very smooth. In addition it didn’t shut off the
injectors that just continued to provide the cylinder with fuel. Which really didn’t
add credence to the GM claimed 30% reduction in fuel used!!!!!
Due to the complexity of the engine, the poor delivery of
power and lack of actual fuel efficiency increases the engine was dropped in
1982 replaced with a 4cylinder unit.
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