<p><a href="/images/old/6a00e5537d966288330148c778f626970c-800wi.jpg" rel="lightbox" style="display: inline;"><img alt="Lead-porsche-918-rsr-live" class="asset  asset-image at-xid-6a00e5537d966288330148c778f626970c" src="/images/old/6a00e5537d966288330148c778f626970c-500wi.jpg" style="width: 470px;" title="Lead-porsche-918-rsr-live" /></a> <br />Porsche has rolled out a race-bred version of the company&#39;s 918 Spyder Concept at this year&#39;s Detroit Auto Show. Packing the same drivetrain as the track-proven 911 GT3 R Hybrid race car, Porsche says that the 918 RSR will bring a whopping 767 combined horsepower to the party when it shows up in the paddock. A total of 563 of those ponies are provided by a 6.2-liter V8 that revs to an atmospheric 10,300 rpm. Porsche has partnered its beastly eight-pot with two electric motors capable of 75 kilowatts of juice positioned at each front wheel.</p> <p>The 918 RSR stores braking energy in a flywheel accumulator stationed where the passenger seat would traditionally rest, and the tech allows the driver to summon up an extra bump in power for passing or acceleration. The pilot can command the boost in grunt for up to eight seconds. Read and see the rest plus video at <a href="http://www.autoblog.com/2011/01/10/porsche-918-rsr-racer-detroit-2011/" target="_blank">autoblog</a>.</p> 