Porsche 911 GT3 RS User Handbook Manual page 26

VarioCam.
Both engines in the 911 GT3
models are equipped with enhan-
ced VarioCam. This system not
only adjusts the camshafts on the
inlet side according to engine
speed and load, it also controls the
exhaust camshaft – for even more
power and torque. The continuous
valve timing adjustment is per-
formed by a rotary-type adjuster
on each camshaft. VarioCam is
an engine control concept that
distinguishes between different
load scenarios and adapts to the
corresponding power requirement.
The adjustment is performed seam-
lessly by the Motronic ME7.8.2
electronic engine management
system. This enables smoother
running characteristics, better fuel
economy, lower exhaust emissions
and, most importantly of all, added
power and torque across the entire
engine speed range.
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Dry-sump lubrication.
A consistent oil supply is funda-
mental to track and competition
driving. This is ensured by the
dry-sump lubrication system, even
during high lateral and longitudinal
acceleration.
Once it has passed through the
engine, two scavenge pumps in
each cylinder head and another
two in the crankcase take the
engine oil quickly back to an
external reservoir.
VarioCam