Engine Control
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
| Designation |
997 (MA.102) |
997 S (MA.101) |
| Valve lift of inlet |
Large lift: 10.5 mm |
11.00 mm |
| Small lift: 3.6 mm |
Small lift: 3.6 mm |
| Valve lift of outlet |
10.35 mm |
11.00 mm |
| Camshaft |
From the crankshaft directly via one timing chain per cylinder bank to the intake and outlet camshaft |
| Camshaft adjustment |
Porsche VarioCam Plus with 40° adjustment (vane adjuster and valve travel adjustment) |
| Valve clearance |
Hydraulic valve-clearance compensation |
| Timing: Inlet opens, large lift |
19° after top dead Centre (TDC) |
11° after TDC |
| Timing: Inlet closes, large lift |
62° after bottom dead center (BDC) |
59° after BDC |
| Timing: Inlet opens, small lift |
44° after TDC |
39° after TDC |
| Timing: Inlet closes, small lift |
14° after BDC |
19° after BDC |
| Timing: Outlet opens |
40° before BDC |
50° before BDC |
| Timing: Outlet closes |
3° before TDC |
4° before TDC |
| Engine control unit |
Siemens SDI 3.1 |
| Ignition |
DME, active ignition module, knock control |
| Firing order |
1-6-2-4-3-5 |
| Spark plugs |
Bosch FRG NQEO4 |
| Electrode gap |
1.6 ± 0.05 mm |
| Electronic throttle |
Electronic throttle actuator control via DME |
| USA LEV II version |
On-Board Diagnosis II (OBDII) |
| Euro 4 |
Euro-On Board Diagnosis (EOBD) |
| Euro 2 |
Customer service - OBD I |