06:08PM - 18.09.'15
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News Source: autoblog.com |
The first rule you learn about playing hide-and-seek is to wait until the seeker is out of sight before you move on to your next position. That feeling comes back to us as we're sitting in the Dinan-tuned 2015 BMW M235i on the twisty stretch of Route 152 near Gilroy, CA. Construction restricts the road to one lane before opening up to five miles of uninterrupted switchbacks. A local tipped us off to pull over and wait for traffic to clear, guaranteeing an open road and no risk of law enforcement seeking us out. Our first turn behind the wheel of the Dinan M235i started just a few miles north at the tuner's engineering and development center, located in an unassuming office park south of San Jose. Dinan conversions are known for being simultaneously subtle and awesome; an enhancement of products that already stand out in their respective classes. Dinan obtains its R&D cars through consumer channels, unlike some tuners that get early access to BMW's engineering for their own development projects. The development process is "reverse engineering," as technical director Casper van der Schoot describes it. Some development cars also come to Dinan through the generosity of its owner fan base. Customers hand over personal vehicles in exchange for discounted products. An M2 is already on order, and the Dinan engineers are on the edge of their seats waiting to take it apart. As with other Dinan cars, the treatment on the M235i increases performance without reinventing the dynamically sound package. Approved dealers can install the Dinan parts, as can "anyone with a modest amount of technical aptitude," according to van de Schoot. Dinan's approach is to extract more of the best aspects of BMW products before supplanting stock parts with its own. That's why the M235i, like all Dinan products, comes with the eponymous Dinantronics engine control unit that remaps and finds more power from the stock inline-six-cylinder engine. A bespoke carbon-fiber cold air intake and stainless steel free-flow exhaust system add at least 15 more horsepower. The most significant alterations in the M235i's engine bay are a Dinan-rebuilt turbocharger and larger intercooler, which help increase total output beyond 440 horsepower. At this point you might wonder if all this untapped capacity is at BMW's disposal from the start, why does it take Dinan to release it? According to van der Schoot, it boils down to the average customer's need – or lack thereof – for raw, unadulterated power. Dinan is, "catering to a customer who doesn't necessarily drive a Mini unless he has an M5 alongside it." The same line of thinking explains why Dinan has yet to alter BMW's i products, including the exotic i8, though van der Schoot admits that it's "inevitable that we'll work on a hybrid BMW" at some point. The M235i in S3 trim was waiting outside of Dinan's ultra-clean facility, wearing gorgeous 19-inch wheels shod with track-ready Michelin Pilot Super Sports tires. S3 denotes the third and highest stage of the Dinan upgrade. In addition to the highest engine tune, S3 includes revised lower control arms, adjustable sway bars, performance springs, and a limited-slip differential. The interior remains stock, save for monogrammed floor mats and aluminum pedals. We expected the adjustments to the M235i to saddle it with the buckboard ride and raw emotion evinced in the 1-Series M Coupe, but to our surprise the ride and driving character remain smooth. Dinan does not change the BMW drive modes, from Eco Pro to Sport Plus, so the power upgrades apply to all driving situations. Switching on the Dinan M235i offers a surprising aural reward: a deep burble from the free-flowing exhaust pipes that makes the inline-six sound sweet and crackly. At idle the engine sounds lovely, but still loud enough to wake some sleeping neighbors. We hit the road in search of the coastline, about an hour west, until we hit the construction area on Route 152. Oh, and the aforementioned tip? It paid off. |
