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Honda unveils new 3.5-liter racing engine

Honda is following Ford's lead and debuting the second twin-turbocharged V6 to be used by Daytona Prototypes in the United Sports Car Championship. The wait won't be long to see it on track because the new engine will debut with the Starworks Motorsport team in a Riley Gen3 prototype chassis at the 12 Hours of Sebring from March 12-15.
The new HR35TT engine is based on Honda's J35 production V6 found in a variety of its models, including the current Accord. The racing version benefits from dry sump lubrication, but is still similar to the production version with an aluminum block, direct injection and single overhead camshafts. It is fueled by 100-octane E10 fuel, but like many racing engines, exact power figures have not been released.
Starworks has had a close relationship with Honda since it won the LMP2 class at the 24 Hours of Le Mans and in the FIA World Endurance Championship in 2012 with a Honda Performance Development ARX-03b chassis and Honda engine. We can't wait to see this new mill hit the track, and see how it fairs against Chip Ganassi Racing's EcoBoost-powered Riley. Scroll down to read the press release for the full details.

McLaren working on P15 supercar to slot between 650S and P1

McLaren has been busy these past few years. It launched the MP4-12C in 2011, the 12C Spider in 2012, the P1 in 2013 and (most recently) the 650S in 2014. But it's not about to stop there. It's got an "entry-level" model in the works, set to take on the Porsche 911, and - according to information reported by Car and Driver and confirmed by McLaren in correspondence with Autoblog - a new flagship model, too.
The project is internally codenamed P15, and it calls for a new flagship that will cap the company's lineup once the P1 finishes its limited production run, but carry a price tag in the neighborhood of $500k to slot in between the P1 and the new 650S.
Just how, you wonder, can McLaren possibly develop another supercar each year? Simple: underneath, they're all essentially the same. (Only we're sure it's anything but simple.) That is to say they're all based on the same carbon monocoque structure and powered by the same 3.8-liter twin-turbo V8 mated to a seven-speed dual-clutch transmission driving the rear wheels. What differentiates them is what the engineers in Woking build around that monocoque and how they tune the engine: +/- 600 horsepower in the 12C (depending on the year it was built), 640 hp in the 650S, or 727 hp in the P1 (with another 177 from the electric assist). The 911 fighter would likely develop in the 500hp range, and the P15 will probably land in the upper 600 (or lower 700) range.

eBay Find of the Day: Why this motorcycle's a deal at $135k

There can be no doubt that Soichiro Honda left a lasting legacy by lending his engineering talents to the company that bears his name. This can be said particularly of motorcycles, and the company outdid itself when it introduced the 1969 CB750. Widely considered the world's first superbike, it combined a then-powerful 67-horsepower, 736cc, inline four-cylinder engine and cutting edge tech for motorcycles at the time like an electric start and front disc brake. It is simply one of the most important motorcycles ever made, and now one of four handmade prototypes is up for auction on eBay Motors.
According to the seller, Honda had an idea that it had something special with the CB750 and built four preproduction models to be shown off to American media in 1968. Each one was hand-built by Honda technicians from bespoke components, and this blue/green model was photographed by magazines and for promotional material at the time. The seller believes that one of the four prototypes was destroyed, one is in Europe and one is unknown, which means this may be the only chance for collectors to get their hands on one.
The bike has prompted quite a bidding war with 97 bids registered as of this writing. With about seven hours left to go in the auction, the top big currently sits at $135,300. At this rate, things could get very exciting at the end. Although to own a prototype for the first super bike, it might be worth it.