A person by the identify of Lord Acton was well-known for saying, “Energy corrupts.” Does it, although? Is that all the time the case? What if extra energy didn’t corrupt—what if it simply made issues extra enjoyable for us all? That’s the case with what Steve Dinan’s Carbahn tuning firm has finished for us BMW fans. For these of you who don’t know, Steve Dinan is a legend among the many BMW tuning group. His unique firm, together with his namesake, he offered in 2013.
Who Is Steve Dinan? A Legend in BMW Tuning
Since then, he has began up Carbahn and continued on the trail of creating BMWs sooner. Steve has a novel philosophy on tuning: he prefers so as to add stability to the automobile, not simply energy. The automobile wants to have the ability to put the facility down and deal with higher in order that it isn’t simply quick on the straightaways however sooner getting from level A to level B—it doesn’t matter what observe or backroad which may be. Energy is nice, however with out correct suspension or dealing with modifications, it could possibly result in catastrophe. Simply search for any Mustang proprietor leaving a Automobiles and Espresso on YouTube.
Unpacking the CB3 Package deal: Powertrain and Suspension Upgrades
This brings us to the 2022 BMW M4 Competitors xDrive that was dropped off to me in November, outfitted by Carbahn with their CB3 bundle. What’s that? It’s a complete overhaul of the M4’s drivetrain and suspension. So to talk, it’s as in the event you wished to show your M4 as much as “11.” The bundle consists of powertrain modifications comparable to a revised engine software program tune, an extra air-to-water warmth exchanger to deal with the facility, a stainless-steel exhaust, and a carbon fiber chilly air consumption. The end result? 735 horsepower and 668 lb-ft of torque. Carbahn didn’t present a 0-60 time, however Automotive and Driver examined this actual automobile and recorded 2.6 seconds for the feat, together with a quarter-mile time of 10.6 seconds at 130 mph. These are very spectacular, supercar-rivaling numbers by themselves.
Carbahn was removed from completed with their work on this bundle. The CB3 bundle additionally consists of a number of suspension upgrades to enhance dealing with and suggestions for the motive force. The suspension upgrades embody coilovers, stiffer anti-roll bars, entrance moonball bushings, and a five-point carbon fiber strut tower brace. Whereas the carbon ceramic brake rotors and pads stay unchanged, metal brake strains have been added to enhance pedal really feel and guarantee constant brake fluid strain below heavy use when the fluid heats up.
Carbon Fiber Additions: Operate and Model Mixed
The remainder of the bundle consists of quite a few carbon fiber beauty items. Whereas they could shave off a couple of kilos total, they’re largely there to sign that there’s one thing a bit of bit completely different about this M4. These items embody a carbon fiber engine bay cowl, entrance grille, entrance splitter, brake ducts, canards, rear decrease skirt, fender vents, and spoiler. Curiously, the carbon fiber entrance grille, which is extra open than the usual grille, gives 40% extra airflow in keeping with Carbahn (and I additionally suppose it occurs to look higher).
There are a number of extra add-ons with the CB3 bundle provided by Carbahn that this automobile got here outfitted with. The primary is a full titanium exhaust. This not solely sounds considerably louder than inventory, nevertheless it additionally shaves off roughly 40-50 lbs (relying on G80 or G82 configuration) from the inventory exhaust and additional reduces again strain to enhance throttle response and energy. The 20” Carbahn-branded cast wheels shave off a number of kilos of unsprung mass per nook and, extra importantly, come outfitted with Michelin Pilot Sport Cup 2R tires in a wider 285 entrance, 305 rear width setup. These are Porsche-spec tires and among the many most aggressive compounds out there for a avenue automobile. They’re outstanding for time assault efficiency and assist management the automobile throughout launches.
Altogether, this bundle prices $20,600. Is that costly? It’s actually not an insignificant sum of money. Nevertheless, contemplating the elements individually, it’s really priced pretty moderately given the standard of the elements and the amount of modifications being made. However context is every little thing, and in the end it depends upon the way it makes the automobile drive and really feel. That is the place I used to be most shocked by the CB3 bundle. To summarize: I completely beloved the non secular expertise I had driving this automobile.
Actual-World Take a look at Drive: Angeles Crest Freeway Expertise
Early one Friday morning, I put Newcomb’s Ranch into my GPS and made my method towards Angeles Crest Freeway. Whereas there was almost no visitors in any respect on the street, I made a decision to start to see what this automobile was all about. It was chilly that morning, and there had been some rain. Steve Dinan arrange the M1 and M2 buttons to his liking: M1 for commuting and enjoyable avenue driving, M2 for pooping your pants—I imply, observe driving and extra spirited driving. I tapped the M1 button and instantly felt the extra throttle response and sensitivity.
The 502 hp from the unique M4 is already spectacular, however readjusting to 735 hp on faucet was virtually comical. The circumstances had been tough, and any probability to even consider making use of an excessive amount of throttle was met by the traction management gentle screaming at me and a few entertaining slip. Michelin Sport Cup 2R tires are unbelievable when heated and in dry circumstances however struggled in these circumstances. As soon as the street cleared and dried, and the tire strain/temperature readings on the M driver’s show confirmed the tires had been heat, it was time to lastly discover extra about the place the $20,600 went into this automobile.
Steve Dinan mentioned this was the quickest automobile to get from level A to level B of any automobile he had ever constructed. He wasn’t kidding. This automobile was magnificent on a backroad. What I shortly discovered was that the facility wasn’t one of the best half: it was the chassis and suspension tuning. Coming right into a nook, I might apply an infinite quantity of brake strain, expertise no dive because of the coilover suspension (nonetheless utilizing the inventory M dampers), load up right into a nook (because of the beefy sway bars), and start making use of throttle mid-corner to rocket out of the exit. The rear-biased xDrive system and great electronically limited-slip differential helped put the facility to the skin rear wheel and made the automobile an absolute pleasure to rotate.
Whereas the coilovers are almost an inch decrease than the usual automobile, they nonetheless allowed for good compliance when hitting undulations within the street and tough pavement. Typically a stiffer automobile isn’t all the time sooner, and Carbahn knew this. This automobile’s suspension is so nicely arrange as a result of it concurrently handles imperfections within the street to keep up the contact patch whereas additionally stopping physique roll and decreasing weight switch in corners. Suspension tuning is a darkish artwork, and so they nailed it with this bundle.
To help the already nice drivetrain, the brand new rear adjustable toe hyperlinks and extra aggressive alignment made the automobile really feel razor-sharp on turn-in. The moonball bushings really helped add again steering really feel that you just could be lacking in fashionable M vehicles. Altogether, these suspension upgrades didn’t simply make the automobile extra succesful in corners; in addition they added really feel and suggestions to the motive force, giving an unparalleled stage of confidence. Surefootedness and engagement don’t all the time go collectively within the automobile world, however on this automobile, they do. This isn’t only a drag strip or quarter-mile queen—this M automobile has been refined to be a fair higher sports activities automobile than its inventory model.
Then there’s the facility. For apparent causes, my attorneys have mentioned I can’t get into specifics, however is the automobile as quick as you’d think about an xDrive M automobile with 735 hp and 668 lb-ft of torque going by way of one of many world’s finest 8-speed automated transmissions? Sure, hypothetically, it’s. In case your mom ever tells you that it is advisable to do one thing to deliver you nearer to God, you might go to church, or you might purchase a Carbahn-tuned BMW M4. This automobile is sort of a big center finger to Isaac Newton as a result of it cheats physics. That’s all I can say in regards to the automobile’s pace.
Was Steve Dinan mendacity about this automobile being the quickest he’s ever constructed for driving on the road? Nope. I imagine him.
What’s humorous about all of this energy from the Carbahn tune is that they provide an identical manufacturing unit guarantee with it, and you’ll even go for an prolonged powertrain guarantee. The S58 is so unbelievably under-stressed in inventory kind that, even with the addition of greater than 200 hp and the following increase, they’re assured sufficient to supply a guaranty. There should not many tuning corporations that provide that stage of reassurance with their aftermarket tunes. Oh, and it’ll nonetheless move smog.
Each day Driving the Carbahn CB3 M4
After the enjoyable mountain driving, it was time to slug by way of LA visitors again residence. An hour and a half on the freeways and floor streets shocked me but once more. Again in consolation mode, the automobile felt like a traditional M4 once more. The coilover suspension nonetheless used the M adaptive dampers, and on the road, the trip is not any harsher. The moonball bushings and toe hyperlinks do add extra NVH because the rubber ends on the usual elements are changed with Teflon-coated aluminum for a extra direct really feel. Is the trade-off of a extra direct driving expertise value a barely rawer feeling M4? I might argue that it’s. The easiest way I can describe it’s that the automobile had 20% extra feeling however solely a 5% penalty for NVH. You may completely daily-drive this automobile and road-trip it with out a lot situation. I additionally nonetheless acquired 27 mpg on the freeway.
Pricing Breakdown: Is the CB3 Package deal Price It?
The weekend I spent with the automobile acquired me pondering. The sticker worth on the M4 Competitors Carbahn began with was simply over $95,000. The CB3 bundle is $20,600. The total titanium exhaust ($3,500) and cast wheel/tire bundle ($4,000) deliver the automobile’s complete to $123,100. Is that some huge cash? Sure, when the common worth of a automobile is just below $50,000, that is actually a substantial sum of money. However is it actually, for what you get? BMW M vehicles have by no means been identified to be low-cost, precisely, however this automobile punches nicely above its weight, particularly with these modifications.
Let’s take into consideration this. For roughly the identical energy, you at the moment are similar to a 992 Turbo S or a McLaren 750S. These vehicles price double, if not triple, the $123,000 out-the-door worth of this Carbahn M4. A C8 Corvette Z06 with a Z07 bundle presents much less energy and is a number of tens of 1000’s of {dollars} extra. On a backroad, I doubt you’d have any points conserving tempo with these supercars. All of the whereas, you’ll be able to road-trip in consolation with 4 folks and baggage—one thing these supercars may battle with.
I remorse loads of issues in my life, and handing again the keys to this Carbahn M4 was one in every of them. This was such an unhinged but surgically exact automobile to drive. I all the time want for a guide gearbox, however the pace and g-forces this automobile produces on a canyon street made me have probably the most enjoyable I’ve ever had in an automated. Carbahn completely nailed dialing this automobile in, taking away any slack from the M4 and including precision and much more pace.
Truthfully, the CB3 bundle is a good worth for what you get. If you need a non secular expertise or are affected by a deficiency in serotonin and oxytocin, you must get this on your automobile. Steve Dinan and the Carbahn engineers weren’t happy with the “Final Driving Machine,” however after you drive one in every of their tuned vehicles, I promise you may be.
