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Jay Leno puts carbon fiber wheels to the test on a Porsche 911 GT3 RS

Jay Leno's Garage usually focuses on looking at cars new and old, speaking to their owners and then Jay taking a drive to see what he thinks. However, Leno throws his usual shtick to the curb this week to do a full product test of the carbon fiber wheels from a company called Carbon Revolution. If you're not interested in hearing about wheels for 18 minutes, don't worry. They get mounted on a Porsche and are tested back-to-back with stock wheels, and Leno takes the 911 for a track test, too.
While carbon-fiber wheels aren't exactly a new idea, Carbon Revolution's goal is to create a lightweight, one-piece product that can be mass produced. The company even claims that it already has a deal with an OEM automaker to offer them on a vehicle in a few years. The key to the technology is that it doesn't need an expensive autoclave to be made.
In the meantime, the company's carbon fiber wheels are available as an aftermarket option for about $15,000 a set, according to the video. They weigh in at about 15.5 pounds each and offer OEM-levels of stiffness, so they could cut some unsprung mass off of a performance car. Watch here as Jay and his mechanic Bernard lap Willow Springs and give their feedback about what they think of this cutting-edge technology.

Porsche 918 Spyder with Weissach package does 0-62 mph in 2.6 seconds

Porsche marketers are having a field day with the 918 Spyder after some last-minute tuning improved the car's performance. They now say that it's so fast it's already beaten itself. Let us explain: Using a Weissach package-equipped 918 as an example (which reduces the plug-in hybrid supercar's weight through the deletion of some interior items, more generous use of carbon fiber and magnesium wheels), the car's previous official 0-62 miles-per-hour time of 2.8 seconds has been cut to 2.6. Additionally, 0-124 mph takes 7.2 seconds and 0-186 mph is dispatched in 19.9 seconds, times that were reduced by half a second and 2.1 seconds, respectively.
In all-electric mode, a non-Weissach pack 918 does 0-62 mph in 6.2 seconds (with the package, 6.1 seconds), down from 6.9 seconds. Efficiency is also improved thanks to the final tuning. The New European Driving Cycle (NEDC) rating of a Weissach pack-equipped car equates to 94 miles per gallon, up three mpg compared to before. That's pretty good for a car with 887 horsepower!
Check out the press release below for more details on how Porsche's final tuning measures improved its flagship supercar.

Porsche Cayman GT4 speeds back into view

We're all familiar with the succession of numbers that follow the letters GT on a hard-core Porsche 911: the GT1 that was Stuttgart's Le Mans contender in the late 90s, the GT2 that packs turbochargers but without the Turbo's all-wheel drive and excess weight, and the naturally aspirated GT3 that's the enthusiast's choice. But a GT4? That's something new, and exactly what Porsche has in store.
Spied testing in Germany once again is the upcoming GT4 version of the Porsche Cayman, set to supersede the existing GTS and take the place of the previous Cayman R at the top of Porsche's junior sports car range. This latest batch of spy shots doesn't show us much more than the last crop, but gives us a much clearer view at what promises to be the most hardcore Cayman to date.
As you can see, the Cayman GT4 packs a much more aggressive aero kit and rolling stock than any version we've seen to date. It's got a lip spoiler, big air dam and GT3-style vent in front of the hood, deep air scoops along the flanks, a set of spindly alloys packing oversized brakes, a diffuser with twin central exhaust tips around back and a rear wing that's likely to be replaced with a sleeker unit before the GT4 reaches production.