Car project
An Alpine White M4 CS, a twin-turbo S55 and a carbon rear wing. The story of a build.
01Key figures
Factory figures for the M4 CS. What the build changes is shown in the dyno section further down.
02The idea
The M4 CS is the most focused version of the F82 generation: less weight, more power, carbon wherever you look. BAVARIAN JET documents what this car becomes. Every part, every dyno session, every idea for the next step.
Bavarian Jet
03Build list
What is installed, what is in progress and what comes next.
The exposed-carbon rear wing is the defining detail of the project: more downforce over the rear axle and a silhouette you recognise instantly.
CFRP from the factory. Light, stiff and with visible weave.
The CFRP roof saves weight where it matters most: at the very top.
The CS carbon aero package, fitted as standard.
Distinctive rear light signature, part of the CS specification.
04Engine
The M4 CS straight-six, taken apart into its main assemblies. Scroll through the exploded view.
S55B30
Scroll to take the engine apart
Indirect charge cooling: a water-cooled charge-air cooler sits right on top of the engine. Short paths for the compressed air make for crisp response.
Luft/WasserSeals the valvetrain from above and carries the ignition coils for all six cylinders.
6 ZündspulenTwo overhead camshafts. Double VANOS varies the valve timing continuously while Valvetronic varies intake valve lift.
DOHC · 24 VentileHome to the valves, injectors and spark plugs. Direct injection delivers fuel precisely into the combustion chamber.
DirekteinspritzungSix 84 mm pistons transfer combustion pressure through the con rods to the crankshaft.
Ø 84,0 mmClosed-deck aluminium construction for high stiffness. The cylinder bores are thermally spray-coated instead of using liners.
Closed-DeckTwo mono-scroll turbochargers, each fed by three cylinders. Short exhaust paths build boost quickly.
2 × Mono-ScrollForged and weight-optimised. 89.6 mm stroke and a 7,600 rpm limit.
Hub 89,6 mmThe oil supply is designed for high lateral forces, keeping lubrication stable even in fast corners on track.
Track-tauglichSpecifications
05Dyno
Power and torque across the rev range. A new run is added after every dyno session.
Approximation based on factory figures (600 Nm at 4,000–5,380 rpm, 460 PS at 6,250 rpm). Not a dyno result.
06Chronicle
Milestone
BMW M unveils the M4 CS: 460 PS, carbon bonnet, roof and aero, 7:38 minutes around the Nordschleife.
From now on every step of the project is documented here: modifications, dyno runs, dates and ideas.
07Gallery
08Ideas & plans
An open board: from the first idea to the finished job.
Studio and rolling shots for the gallery, social media and partners.
First laps on track and a matching setup.
A run in the current state as the baseline for everything that follows.
All content can now be maintained directly.
09Sponsors & partners
Brands that make this project possible, and packages for anyone who wants to be part of it.
Open now: the first partner slots are available.
Packages
on request
on request
on request
Become a partner
BAVARIAN JET shows up at meets, on track and on social media. As a partner, your brand becomes part of a project where every detail matters.
10Contact
Sponsorship, collaborations, photo shoots or simply questions about the car.
Or simply by email
devo@m4cs.deFollow