*DTM vozači Timo Glock i Bruno Spengler o BMW-u M3 i M4 Coupe na Nirburgringu.
*Zvanična premijera oba modela će biti održana u januaru 2014. na sajmu automobila u Detroitu, a u nastavku su i njihove specifikacije iz fabričkog press saopštenja.
Specifikacije:
ENGINE
Inline 6 cylinder engine with two mono-scroll turbochargers
Direct Injection
VALVETRONIC
Double-VANOS
closed-decked crankcase
twin-wire arc-spray coating (instead of liners) in cylinder bores reduce engine weight
430 HP (approximately)
369+ LB-FT (500 Nm)
See Dyno Chart
Higher than 7500 RPM redline
TURBOS
Two mono-scroll turbochargers
Impulse charging for optimized responsiveness
Flow-enhanced manifolds
Electric wastegate actuator
COOLING
Double-flow oil recirculation pumps
Turbocharger suction system
Main radiator plus additional radiators for the high- and low-temperature circuits, turbocharger and transmission,
Large indirect intercooler
Low-weight magnesium oil sump
Temperature-stabilizing electric water pump
WEIGHT
Under 3,306 lb (1500kg) weight (no mention if this is curb weight and no specifics provided as to what equipment included/not included in figure)
compare to E46 M3 at ~3,400 lb curb weight
compare to E92 M3 at ~3,600 lb curb weight
compare to C63 AMG at ~3,900 lb curb weight
compare to RS5 at ~4,000 lb curb weight
~ 7.68 lb/hp power to weight
compare to E92 M3 at 8.7
compare to C63 AMG at 8.7
compare to RS5 at 9.0
compare to E46 M3 at 10.25
Fuel consumption and emissions reduction of 25%
CARBON FIBER CONSTRUCTION
CFRP drive shaft
40% weight savings over previous M3
increased stiffness
reduced rotating mass for better acceleration and throttle response
CFRP roof for both M3 and M4
saves 11 pounds (5kg) on M3
saves more than 13.2 pounds (6kg) on M4
CFRP roof bow
Carbon fiber trunk for M4 (11 pounds (5kg) weight savings)
CFRP front strut brace standard (weighs just 3.3 pounds (1.5 kg))
TRANSMISSION
Standard 6 speed manual transmission
automatic throttle blips on downshift
more compact and quieter than predecessor E90/E92 M3 6 speed
26.4 pounds (12kg) lighter
carbon fiber friction linings in synchroniser rings
dry sump lubrication
Optional 7 speed M DCT (double clutch transmission) with launch control
Active M Differential (with constantly variable locking a la M5/M6)
Forged crankshaft
STEERING
Electric power steering specially tuned for M3/M4
Servotronic function electronically adjusts the level of steering assistance
Three modes: Comfort, Sport, Sport+
SUSPENSION / CHASSIS
Optional Adaptive M suspension (with Comfort, Sport, Sport+ modes)
CFRP front strut brace
Double-joint spring strut front axle (saves 11 pounds)
New five-link rear axle made from forged aluminum (saves 6.6 pounds)
Aluminum suspension
Aluminium stiffening plate
Rear axle subframe fixed directly to body (bolted joints between the axle subframe and the body sills, without use of elastic rubber elements).
WHEELS / BRAKES
Lightweight forged wheels standard
Staggered tire sizes
M compound brakes standard (in blue)
M carbon ceramic brakes optional (in gold)
EXHAUST
Exhaust features electrically controlled flaps just before rear silencer to minimize exhaust back-pressure as well as giving precise feedback on engine load.
AERO
50:50 weight distribution
Air Curtain
M gills with integrated Air Breather behind front wheels
Foto: Bimmerpost.com i BMWblog.com
