Porsche 911 GT3 Brochure page 11

VarioCam. control concept that distinguishes
between different load scenarios
For the first time, the engine in the and adapts to the corresponding
new 911 GT3 is equipped with power requirement.
enhanced VarioCam. This improved
system not only adjusts the The adjustment is performed
camshafts on the inlet side accord- seamlessly by the Motronic ME7.8.2
ing to engine speed and load, electronic engine management
it now also controls the exhaust system. This enables smoother
camshaft – for even more power running characteristics, better
and torque. The continuous valve fuel economy, lower exhaust
timing adjustment is performed emissions and, most importantly
by a rotary-type adjuster on each of all, added power and torque
camshaft. VarioCam is an engine across the entire engine speed
range.
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 extreme 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 and efficiently
back to an external reservoir.
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The oil pumps are designed so
that there is negative pressure
in the crankcase. This reduces
resistance to the movement
of the pistons to improve power
output and efficiency. Another
pump in the crankcase supplies
the lubricating points in the engine
from the external reservoir.
VarioCam
For the engine this means The new 911 GT3 is factory-filled
consistent lubrication of the with Mobil 1 high-performance
crankshaft assembly and fully synthetic oil. Its exceptional
the two cylinder banks, even lubricating properties ensure
under the extreme lateral reliable starting even in the
and longitudinal loads which coldest conditions and, importantly,
are possible with sport tyres. contribute to the long-term durability
of the engine.
The new 911 GT3 | Drive