The web is alive at the moment with technical details of the new V8 M3 engine, and we know many of you already have many of the details. If you don't, this is the full set of information realeased by BMW. If you want to hear the engine being worked hard, click on the links to hear what our man came back from BMW with...
- 3999cc
- 414bhp @ 8,300rpm
- 295lb ft @ 3,900rpm (251lb ft available from 2,000rpm)
- 8,400 max engine speed
- Engine weighs 202kg – 15kg lighter than old ‘six’
- Aluminium silicon alloy crankcase, iron-coated pistons run directly in the bores of hard silicon crystals
- Bedplate structure
- Crankshaft weighs 20kg – 5 main bearings
- Oil cooled pistons
- High-strength steel magnesium alloy connecting rods weighing 623g each
- Single piece alloy cylinder heads with 4 valves per cylinder
- Double Vanos variable camshaft control
- Double chain-driven cams
- Oil system works to 1.4G with 2 pumps
- 8 individual throttle bodies. Accelerator pedal position monitored 200 times per second. Take 120 milliseconds to reach maximum opening point.
- No air mass sensor – ecu does the calculations from the range of data available
- 2, 4 into 1 ‘fan type’ exhaust manifolds
- 4 cats
- MSS60 ecu – development of the one found in the V10 M engine. 3 32bit processors. Can handle more then 200 million individual operations per second.
New M3 V8 engine specs
Fuel RON 98 (95)
Max output bhp 414 at 8,300rpm
Max torque lb ft 295 at 3,900rpm
Max engine speed 8,400
Stroke mm 75.2
Bore mm 92.0
Displacement cm3 3,999
Distance between cylinders mm 98
Cylinder arrangement 8-cylinder V-engine
Valve plate diameter, intake mm 35.0
Valve plate diameter, outlet mm 30.5
Compression ratio 12.0:1
Fuel injection Intake pipe fuel injection
Fuel injection pressure bar 3–6
Average combustion chamber pressure bar 12.6
Maximum combustion chamber pressure bar 100
Engine weight to BMW standard kg 202
Output per litre bhp/litre 103.5
Crankcase Aluminium
Valvetrain Infinite camshaft adjustment and hydraulic valve clearance adjustment for intake and outlet (double VANOS)
Power and torque graph (outputs in metric HP and Nm)
M3 V8