2015 M3 specs released

[MoneyTron]

BMW went HAM.

INE

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

 

[MoneyTron]

M4 Concept (production will look the same)

 

[BlvdBrawler]

Dat curb weight... .
Dat reduction in emissions.... .
Dat redline .
Dat torque ... but .

This could be the one, brehs..

Edit: Oh and "automatic throttle blips on downshift" dat Nissan innovation .

 

[Mordith]

Dat curb weight... .
Dat reduction in emissions.... .
Dat redline .
Dat torque ... but .

This could be the one, brehs..

Edit: Oh and "automatic throttle blips on downshift" dat Nissan innovation .

And most importantly the engine deck is closed..... This car is going to be a fukking problem. If this engine turns out anywhere near as moddable as a N54 and can up power by 50% with tune plus bolt-ons..We are looking at over 600hp with ~ 3300lb curb weight....

This will definitely be my next car. I have no doubt in my mind.

 

[BlvdBrawler]

And most importantly the engine deck is closed..... This car is going to be a fukking problem. If this engine turns out anywhere near as moddable as a N54 and can up power by 50% with tune plus bolt-ons..We are looking at over 600hp with ~ 3300lb curb weight....

This will definitely be my next car. I have no doubt in my mind.

What significance is a closed engine deck, breh?

With two monoscroll turbos, the potential is definitely there.

For me it's either gonna be this or an Audi S7. But that's at least 5 years away.

 

[King Sun]

 

[unit321]

What significance is a closed engine deck, breh?

An open deck engine has more gaps between cylinders in the engine block. This allows for lighter weight and more cooling. A closed deck engine does not have these gaps between the cylinders in the engine block. The block will be stronger but will be heavier than an equivalently sized open deck engine. What this means is that they won't have to reinforce or sleeve the cylinders because of the extra power generated by the turbos.
People who modify open deck engines for more a lot more power have to reinforce the cylinders because of these gaps in the block. If they didn't do it, there would be the potential for the cylinder wall to get blown out.

With two monoscroll turbos, the potential is definitely there.

For me it's either gonna be this or an Audi S7. But that's at least 5 years away.

 

[posterchild336]

torque is kinda garbage but I am sure the modders will be cooking up something to change this real quick

 

[Ice Water]

That's an impressive curb Weight.

 

[Uncle Kingpin]

I'm usually a sucker for M-series cars, but this is the first i'm not considering. The specs sound great, i just don't like how this 2015 looks. All the M's in the past looked like they had muscles, this shyt look anorexic compared to an R5 or an AMG.

 

[unit321]

That amount of torque for a twin turbo is sad. A modified Subaru Impreza WRX STi with a single turbo is tens of thousands less than the future price of this M3 and almost has that amount of torque. But for the decreased weight, it's not bad. I'm guessing, they don't want to push for more boost for street reliability. CAI, higher-flow exhaust, and ECU tune/remap will easily get this car into the 400+ lb/ft of torque.

 

[BlvdBrawler]

torque is kinda garbage but I am sure the modders will be cooking up something to change this real quick

I'm guessing they wanted to keep the high-revving nature of the engine intact, but give folks enough daily-driveability that you don't need to rev to 6k just to go to work.

If the curb weight turns out to be legit, it should be enough.

 

[posterchild336]

I'm guessing they wanted to keep the high-revving nature of the engine intact, but give folks enough daily-driveability that you don't need to rev to 6k just to go to work.

If the curb weight turns out to be legit, it should be enough.

and for segmentation as well...they want to leave enough room for the m5/6 specs to be greater on paper

 

[Malta]

An open deck engine has more gaps between cylinders in the engine block. This allows for lighter weight and more cooling. A closed deck engine does not have these gaps between the cylinders in the engine block. The block will be stronger but will be heavier than an equivalently sized open deck engine. What this means is that they won't have to reinforce or sleeve the cylinders because of the extra power generated by the turbos.
People who modify open deck engines for more a lot more power have to reinforce the cylinders because of these gaps in the block. If they didn't do it, there would be the potential for the cylinder wall to get blown out.

Case in point, the 2jz-gte is closed deck (94-98 Supra), and people have hit over 1000hp on stock blocks.

That curb weight is CRAZY by the way.

 

[Mordith]

and for segmentation as well...they want to leave enough room for the m5/6 specs to be greater on paper

You hit the nail on the head. BMW has purposely underrated all of their turbo cars for this very reason. I would say that torque will be around 400 ft/lbs stock.

Closed deck = More boost = Race Car...