2013 Nissan GT-R gets a tweak

Nissan has had a play with the GT-R for 2013 with suspension upgrades, sharper responses and a more comfortable ride. On the performance front, the 2013 model year Nissan GT-R gets a set of new high-output injectors which give more concise control to fuel for better mid range and high rev response, a new relief valve for the turbocharger bypass cuts the decrease of pressure to sustain response and a new oil pan baffle helps maintain oil pressure. On the handling front Nissan has revised dampers, springs and the front anti-roll bar to lower the centre of gravity, new cam bolts on the front suspension improve accuracy and the torque carrying capacity of the driveshaft to hub bearings has been increased to you can attack a track more reliably.

Porsche Panamera convertible plans uncovered

A series of European and U.S. patent applications obtained by AutoWeek show that Porsche remains committed to building a four-door convertible version of its flagship Panamera, despite recent comments from Zuffenhausen insiders indicating the car had been canceled. The new car, depicted in official drawings that accompany the latest Porsche patent applications filed in February, eschews the two-door route taken by all of its upmarket rivals for a practical four-door body.

Chevrolet Corvette ZR1 will be Indy 500 pace car

The 2013 Chevrolet Corvette ZR1 will be the pace car for this year's Indianapolis 500--a fitting victory lap as the current sixth-generation Corvette heads for the end of its production run and the end of this version of the ZR1. The Indy pace-car Corvette will wear the 60th-anniversary trim package--an arctic white exterior with silver stripes down the center of the car and a blue interior with suede leather coverings on the steering wheel, center console and in the seats. Changes for the pace car include only the addition of a light bar on the roof, some racing-safety equipment and race logos.