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Honda getting in on the Daytona Prototype racing action

Racing fans at Sebring are plenty used to seeing Honda powering into the winner's circle, the Japanese motor company having claimed class victories at the endurance race in Florida in 2007, 2009, 2011, 2012 and 2013. Those were all in the LMP2 category, but with the Twelve Hours of Sebring now part of the combined United SportsCar Championship, Honda is branching out into another class: Daytona Prototypes.
The purpose-built racing machinery that were once part of the Grand-Am series are now racing alongside the LMP2 prototypes from the American Le Mans Series under the united championship. So far Ford and Chevy have signed on to power the Daytona Prototypes, and now Honda's joining their ranks as the only manufacturer to field entries in both categories of the championship's Prototype class.
The competition-spec 3.5-liter twin-turbo V6 revealed last month is based on the same J35 engine that powers everything from the Honda Accord to the Acura RLX and MDX. Now it will power the Riley chassis fielded by Starworks Motorsports, competing alongside the pair of Honda Performance Development (HPD) ARX-03b chassis which Extreme Speed Motorsports will campaign under LMP2 regulations, giving Honda a two-pronged, three-car assault on the top class of the new American sports car racing series.

Bisimoto's 911 and Honda Odyssey each pack 1,000 hp

There aren't a lot of vehicles on the road that pack a thousand horsepower. The Bugatti Veyron and McLaren P1 are in rare company, but there have been a handful of aftermarket tuners that have managed to extract that much power out of lesser vehicles. Bisimoto is responsible for more than its fair share, so Matt Farah and the team at Drive stopped by the workshop in Southern California to check out the craftsmanship for the latest episode of Tuned. What they found is two vehicles with that astronomical four-figure output that otherwise couldn't be more different from each other. First up is the vintage, stripped-out 911 that company founder Bisi Ezerioha built for himself. It's based on a 1976 Porsche 911 Carrera with a widebody kit and a pair of turbochargers hanging off the back. The result is that thousand-horsepower output and, as Farah found out, one of the scariest, hairiest, and squirliest automobiles ever devised. As if that weren't enough, there's a thousand-horsepower minivan on the docket, too. This one is based on a Honda Odyssey, rebuilt on an air suspension and a six-speed manual gearbox conversion out of an Acura TL. And of course the engine's been tuned to deliver that headline output figure. Honda and Bisimoto showcased the vehicle at the SEMA show a couple of years ago, where Farah says he didn't think it could possibly hold together. But as he discovered in the video above, it actually does, and accelerates with tenacity... and plenty of room for the kids.

Honda patents engine with different cylinder displacements

A basic rule of engine design states that the displacement of a cylinder is equal to the engine's total displacement divided by its cylinder count. Honda, according to a recently surfaced Japanese patent, is looking to break that rule with an engine containing cylinders of different sizes. We've done our best to translate it from patent-ese. The idea is that different-sized combustion chambers give more flexibility when any combination of cylinders are deactivated, or rested. Because the different numbers can be combined in various ways, it provides more and smaller increments than would an engine with equal-displacement cylinders. Take a 2.0-liter four-cylinder, for example. Following the golden displacement rule, each of the four cylinders has a volume of 500 cc, giving displacement increments of 500 cc when any cylinder is deactivated. But suppose instead that the four cylinders displace 300, 425, 600, and 675 cc, respectively. This would give the engine 15 available displacements instead of just four, and the spacing between each option would be far less than 500cc. As a result, those different virtual displacements would provide more adjustment between power and efficiency than a cylinder-deactivation system can on a conventional engine. Honda's patent describes cylinders with equal bore size, with the displacement from cylinder to cylinder varying based on the crank throw radius – the longer the throw, the longer the stroke and the larger the displacement of that particular combustion chamber. The patent describes how the cylinder sizes would need to be arranged to spread the load on the crankshaft and presumably limit vibration that would be introduced by the different pulse magnitudes. If we're interpreting things correctly, the largest cylinder (the one with the longest crank throw radius) sits in the middle of the bank with the smaller ones alternating on either side as they decrease in displacement. This concept is described for multi-cylinder inline and V-type engines of various sizes. The patent was filed in March of 2014 and published in January of this year. Whether or not this arrangement will reach production is of course unknown, but the advantages in terms of both efficiency and power seem promising. Related Video: News Source: Japan Patent Office via Auto Guide Green Honda Fuel Efficiency Technology patent