GSR Autosport M4
#1
06-17-2014, 06:07 PM
GSR Autosport M4
The GSR Autosport Team are eagerly awaiting our new M4. Thursday can't come soon enough! We got a sneak peak of it waiting for the PPI and last minute factory software updates.
GSR M4
GSR M4
#2
06-19-2014, 11:46 AM
Todays the day! We are traveling up Pacific Coast Highway to BMW Santa Barbara...
The M4 will be in our hands soon enough.
The M4 will be in our hands soon enough.
Last edited by GSR Autosport; 06-20-2014 at 05:50 PM.
#5
06-20-2014, 06:21 PM
The GSR Autosport M4 is finally here! After a nice leisurely drive down Pacific Coast Highway yesterday evening after picking the car up from Santa Barbara BMW, the M4 has arrived at GSR Headquarters.
This thing is sweet! It looks even better in person, very toned, aggressive, and well proportioned. The paint looks great with a pewter metallic flake that has a really cool effect in the sunlight.
Options List:
-Yas Marina Blue Metallic Paint
-Black Extended Merino Leather
-Lighting Package-
· Adaptive Full LED Lights
· Automatic High Beams
-Harman Kardon Surround Sound
-Enhanced B/T and Smartphone Integration
-M Double-Clutch Transmission
-Adaptive M Suspension
-19” Black 437 M Wheels
Driving impressions:
The first thing you notice is the engine. Tons of power accompanied by an almost equal amount of torque make this a completely different beast when compared to the outgoing S65 naturally aspirated V8 of the E9x M3. After getting past the neck snapping power delivery, the handling and dynamics are the next area of interest. One neat feature is that BMW has transitioned to solid subframe mounting on this generation of M3/4, and the results are noticeable. The new M4 is sharper than its predecessors, turning in aggressively with a good balance and lots of composure. The adaptive suspension does a great job of providing the best of both worlds. While the spring rates feel pretty firm, the dampers smooth out the ride well. The adaptive system tightens up the suspension when necessary and delivers responsive and flat cornering without feeling harsh.
One criticism we have found is that the stability/traction control can be a little overly aggressive, even in sport+ mode. With all the torque on tap, the system understandably it has its work cut out for it. This is something we will be looking into further and working to develop when we get into tuning the ECU.
We got to work right away with a quick photo shoot and then got it up on the lift to start assessing things underneath. As expected it is similar to the F30/F32 3-Series it is based on but with all the essential upgrades that make it an M car, and then some.
First thoughts are lots of extra bracing and more solid mounting of things like the subframes to increase the responsiveness of the chassis when compared to the previous M3.
Then we put it on the scales to check the starting weight. Pretty darn close to claimed weight, coming in at 3570 lbs with about half a tank of fuel.
We have lots planned for this new torch-bearer of the M name. First items on the list are suspension, wheels, brakes, and ECU tuning.
Stay tuned for lots more updates as we develop this new platform!
In the meantime, here are a couple more pics:
Last edited by GSR Autosport; 06-26-2014 at 12:31 PM.
#7
06-26-2014, 11:52 AM
GSR Autosport: AP Racing Radi-Cal Brake System
GSR Autosport's technical partner AP Racing/Stillen came by yesterday to spec out the M4, taking measurements to develop the prototype AP Radi-Cal Brake System for the car. We can’t wait to see 6 Pistons up front, 4 pistons in back paired with high thermal capacity 2pc. J-Hook Rotors all around!
We found several interesting BMW changes along the way, for example: the new wave style hub design and asymmetric brake rotor locating pins.
We found several interesting BMW changes along the way, for example: the new wave style hub design and asymmetric brake rotor locating pins.
Trending Topics
#8
06-29-2014, 01:16 AM
Can't wait to see what numbers are pulled from this car once the ECU is tapped into. Great looking car BTW!
#9
06-29-2014, 10:16 AM
If the 2 Series dynos (#228BMWRacing) are any indication, our M4 will be underrated from the factory. The biggest tuning challenges we anticipate are unlocking the increasingly complex BMW encryption technology and managing the engines thermal capacity once the power levels are increased. That said, there appears to be a lot of potential with this power plant.
#11
06-29-2014, 10:46 PM
Thanks Nola,
If the 2 Series dynos (#228BMWRacing) are any indication, our M4 will be underrated from the factory. The biggest tuning challenges we anticipate are unlocking the increasingly complex BMW encryption technology and managing the engines thermal capacity once the power levels are increased. That said, there appears to be a lot of potential with this power plant.
If the 2 Series dynos (#228BMWRacing) are any indication, our M4 will be underrated from the factory. The biggest tuning challenges we anticipate are unlocking the increasingly complex BMW encryption technology and managing the engines thermal capacity once the power levels are increased. That said, there appears to be a lot of potential with this power plant.
As far as the tuning challenges, its basically going to be the same thing as when the 335i came out, once you figure out BMWs software its game on or is their more to it with the M4?
#12
06-30-2014, 12:21 PM
