Autoblog

It was only a matter of time before the first consumer-owned Nissan GT-R in the U.S. made its way onto a set of dyno rollers. Edmunds Inside Line made the call to Harman Motive, Road Race Engineering (RRE) and Daryl Alison of JSpec Connect to organize a day of data collecting recently for the import from Japan. Harman and RRE happen to each house all-wheel-drive-capable dynos, with a Mustang and Dynapack, respectively. The two units were chosen because they each utilize different means of measuring vehicle power output, making for a range of results that can be more readily used for comparison purposes. And compare they do as a 997 Porsche 911 Turbo and 2008 BMW M3 happened to show up at the testing facilities that very same day, fancy that. Follow the jump to get a handle on the results.

click the image above for the gallery

Here's Top Gear's cure for their idiot dyno test that proved nothing. As much as we love Top Gear, their derision of the GT500 for producing a "mere" 447 horespower on a chassis dyno is pure BS. A 10-percent loss through the drivetrain is stellar, yet the spin from our snarky British friends was that it was somehow subpar. Kenne Bell has the antidote, and it's available in several stages of tune, from streetable to antisocial.

Since the GT500 is factory-equipped with a supercharger, the engine internals have been beefed up for boost, and a water to air intercooler is in place. The Kenne Bell system replaces the stock Eaton blower with its trademark Twin Screw system. The throttle body is also upsized to 75 millimeters versus the stock 60, but the rest of the intake tract remains stock. Rounding out the Stage 1 tuning is an ECU flash, and the end result is 606 horsepower at the rear wheels. Take that, Hamster and Clarkson! Changing out a few other intake components and fiddling with the drive pulley's diameter will net you Stage 2 or 3 tuning, delivering up to 692 horsepower on the rollers. Maybe this kit will serve to quiet some of the carping from the Top Gear pundits, but we think they just don't understand muscle cars. It's a different flavor of performance, that's for sure, and the Kenne Bell upgrades add even more spice.

Thanks for the tip, Drew

[Source: Mustang Life]