BMW M is having a little bit of a renaissance; I’ve by no means seen a interval through which M automobiles have been this fascinating or ubiquitous on the common monitor day. Certain, they’ve all the time been widespread, however for the reason that last-gen automobiles bought reasonably priced and the present automobiles bought all-wheel drive, an M automotive with a number of mods has seemingly turn into the default selection—despite the fact that, who the hell would monitor a 4,000-pound sport sedan?
This conundrum is precisely why I borrowed the extra hardcore BMW M4 CS and mobbed as much as Buttonwillow Raceway Park in California’s Central Valley. I can’t stroll three ft at a monitor day with out working into one other trendy M automotive, so it’s time to determine why individuals love this stuff.
And, to be frank, there are a number of actually nice causes.
Not The Similar As Earlier than
For one, the outdated status of BMW M automobiles being finicky, unreliable issues is sort of totally extinguished. In some way, someway, BMW made an unbelievable change, nearly in a single day.
The trendy, turbocharged automobiles have one thing of a sterling status in monitor circles. Many skilled monitor fingers, my associates included, reward the reliability of the issues endlessly, whether or not it is the wonderful manufacturing facility brakes, the well-sorted suspension, and even the seemingly bombproof S58 engine.
However possibly most significantly: these automobiles are fucking fast. Take a look at any main nationwide time assault competitors collection proper now. Practically each podium and each win is one thing BMW engineered—together with the A90 Toyota Supra. I’d argue there are simply as many F80-generation BMW M3s and M4s making up these numbers, with the fashionable stuff catching up as resale values go down.
Picture by: Tirth Patel
What Is ‘Competitors Sport?’
This recognition is why a automotive just like the M4 CS exists. CS stands for “Competitors Sport”—not “Coupe Sport” or “Membership Sport.” Admittedly, it doesn’t stand for “Observe Particular” or “Observe Prepared,” both. However CS, for so long as BMW has used the identify, means elevated monitor efficiency in each sense.
Within the case of this M4 CS (G82, for the nerds), which means fairly a bit extra on your steep $124,675 base value. Energy is up by 20 over the M4 Competitors xDrive for a complete of 543 horsepower. Extra importantly, it loses 77 kilos with a CS-exclusive carbon fiber hood, heart console, roof, seats, and carbon ceramic brakes.
The M4 additionally will get CS-specific suspension and transmission tuning to compensate for that weight reduction and the stickier Michelin Pilot Sport Cup 2 tires. It additionally will get a bunch of CS aero bits—distinctive entrance grilles, lip, aspect skirts, rear spoiler, rear decrease bumper garnishes, and yellow daytime working lights.
Picture by: Tirth Patel
Taking On Buttonwillow
Beneath the blazing daylight of Buttonwillow Raceway, I did my pre-run monitor prep. BMW’s directions had been easy: Set tire pressures and go. Nevertheless it’s all the time prudent to present the automotive an in depth look earlier than any monitor session, and torque the wheels for good measure. The torque spec, by the best way, is a big 105 pound-feet.
Observe situations had been clear and heat at about 84 levels Fahrenheit. Observe floor temperatures learn at 101 levels. Total, a scorching day for any automotive, most of all a 543-hp twin-turbo inline-six.
But, the cooling package deal of the M4 CS, and certainly any M4, is kind of substantial. At least six warmth exchangers are packaged inside the nostril. There’s a fundamental central radiator for engine coolant, flanked by two auxiliary aspect radiators that additionally movement coolant. A devoted, flat-mounted oil cooler handles oil duties independently, whereas one other warmth exchanger for the water-to-air intercooler stacks atop the central radiator. The cooling stack is accomplished by a gearbox cooler for the ZF eight-speed automated transmission.
Picture by: BMW
That could be a massive a part of that aforementioned sturdiness. Most automobiles do not have cooling found out from the manufacturing facility, even most from Germany. Certain, they’ll take a monitor session or two, however that is it. What the M4 CS did was nothing wanting astonishing: It cooled down after I pushed more durable round Buttonwillow.
Whereas beginning temperatures hovered round 210 levels for each oil and coolant, after a tough session, coolant temperatures trended down towards 190 levels, whereas the oil remained a resolute 240 levels. Each temperatures are fairly ideally suited for prolonged monitor use. With no separate gearbox temperature readout, I couldn’t touch upon habits, however there have been no odd hiccups.
What did overheat was the Cup 2 tires. I bought them blazing scorching in simply three laps, with reported temperatures exceeding 200 levels—successfully boiling for a avenue tire. And admittedly, even when the tires had been cooled down, and I used to be gentler on the throttle, I discovered little or no pleasure in driving the CS round my dwelling monitor.
What the M4 CS did was nothing wanting astonishing: It cooled down after I pushed more durable round Buttonwillow.
The M4 CS’ dealing with steadiness was nothing wanting doughy. Nothing felt related or responsive. Even with all methods off, it refused to do something however understeer and grind its tires off, a giant purpose for these tire temperatures. Extra irritating was the shortage of choices. The CS didn’t need to be pushed in any type besides its type, and that simply means counting on its methods.
Its entrance tires had been so overwhelmed by the straightforward act of cornering that including brake stress to tuck the nostril merely elevated the understeer. And that’s if you happen to had been fortunate sufficient to not set off its intrusive anti-lock brakes that panic and instantly cut back yaw charge, inflicting extra understeer. Rolling any velocity on the apex is unwise and can lead to quite a lot of ready, ready, ready for rotation. In the meantime, no data in anyway travels up the steering column to the oddly thick steering wheel. At the very least, exits are unbelievable due to the xDrive.
However there was quite a lot of good beneath the floor, issues that gave me confidence within the potential of the automotive. The dampers had been unbelievable, absorbing Buttonwillow’s bumpy floor and curbing with one-and-done motions whereas additionally maintaining the CS mild on its ft throughout transitions. Even when it didn’t need to flip through the nook all that a lot, it certain cherished transitioning from nook to nook.
And the twin-turbo six is nothing wanting unbelievable, with gobs of low-end torque and rewarding top-end energy. The eight-speed gearbox matched the vibe with lightning shifts. And, if you happen to gave up on velocity and wished enjoyable, turning the xDrive off and going full rear-drive solely, the CS turned fairly the competent drift machine. Certain, I couldn’t provoke a swish drift with the brakes, but it surely certain did a pleasant powerslide.
Pushed considerably beneath the restrict, it might then be barely extra responsive. However hard-edged monitor automotive, this isn’t. Although it did a strong laptime round Buttonwillow CW13: 1:58.64. For a scorching day in a automotive that felt prefer it didn’t need to flip, I discovered it spectacular. But the cheaper, lighter Honda Civic Sort R did a 1:59.5–That automotive, nonetheless, overheated in mere laps.
Not The M You Need
Although it isn’t my favourite to drive, there isn’t any denying the competence of the M4 CS. And to be frank, all people modifies their track-bound Ms. It isn’t removed from greatness; a set of wheels and stickier, track-specific tires would repair practically all of my points. It already has the braking, cooling, seats, and total calibration to get the job completed, which is costlier than you suppose.
Nevertheless it turns into a query of worth. If you would like all of the particular CS stuff and also you’re a hardcore BMW nerd who will flippantly modify the automotive, that is your transfer. If you would like an distinctive dual-purpose avenue and monitor automotive that can take little or no to type out, I’d save the cash and purchase an M4 Competitors (which has all the similar cooling and cheaper metal brakes) and a few mods.
