Porsche 911 GT3 RS User Handbook Manual page 13

An extremely lightweight titanium ratios, provides plenty of perfor-
connecting rod and lighter pistons mance.
reduce oscillating masses, thus
ensuring dynamic engine speed Added to this is a variable intake
development. The inlet and exhaust manifold with two resonance valves
valves are actuated by especially (page 38) which work together
lightweight tappets and hydraulic with the sports exhaust system to
valve clearance adjustment. ensure efficient cylinder charging
and high throughput rates. The
This enables a maximum engine large volume of the exhaust system
speed of 8,500 rpm which, to- supplements the low-resistance
gether with the short sporty gear intake manifold to improve cylinder
charging and increase perfor-
mance.
In brief, it is all about performance
– including driver performance.
We have simply provided the right
conditions for it.
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12
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19
1. VarioCam for inlet valves 10. Forged aluminium piston
2. VarioCam for outlet valves 11. Titanium connecting rod
3. Tappets with hydraulic valve 12. Nikasil-coated cylinder bore
clearance adjustment 13. Resonance valve
4. Inlet valves 14. Throttle valve (electronically
5. Valve springs actuated)
6. Crankshaft 15. Variable intake manifold
7. Intake camshaft 16. Separate engine oil reservoir
8. Camshaft drive chain (dry-sump lubrication)
9. Tensioner rail 17. Oil filler pipe
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18
3.8-litre Boxer engine 911 GT3
18. Oil scavenge pumps for
cylinder heads
19. Vacuum pump
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