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The GT-R/911 schoolyard scuffuffle continues, with Nissan looking at Porsche’s test and basically saying “yer doin it wrong” to the German automaker. Chief engineer Kazutoshi Mizuno has graciously offered remedial driving classes to the driver for Porsche’s lapping session where a GT-R was reportedly 25 seconds off Nissan’s torrid time of 7 minutes, 29 seconds. Porsche had concluded that special tires must have been quietly fitted in a quest for ‘Ring primacy. Porsche has yet to say anything other than “Ve don’t sink zee car can do it in schtock form.”

Not so, says Nissan. While a claim to the fastest production car on the Nürburgring might help prospective customers froth up some money, and owners are unlikely to try verifying the claim, Nissan is not interested in wasting time on one-offs, according to Mizuno. “For us, testing the car in standard production specification is far more relevant”, says the engineer. The very tires that carried driver Toshio Suzuki on the 7:29 run are in the hands of Sumitomo, and Nissan would encourage interested parties to STFU and go look at the rolling stock. It seems Nissan thinks Porsche needs a little help figuring out the GT-R, to which the company will be happy to help. “We are aware that several automakers have purchased the GT-R for their own testing and evaluation,” Nissan says in its most recent rebuttal, “we would welcome the opportunity to help any auto manufacturer with understanding the full capabilities of the GT-R.”

With all the news surrounding the Nissan GT-R V-Spec, the progress on the Godzilla tuning front has been largely overlooked. According to a recent article in Japan’s BestCar magazine, the Amuse team has broken the 600 hp mark (at the crank) with a combination of a high-flow exhaust and a tweaked ECU. There were no details on how the GT-R’s computer was hacked, but Amuse was able to up the boost to 18 psi, resulting in an increase in output to 602.73 hp and 576.95 lb.-ft. of torque.

However, tuners are beginning to question how the stock gearbox will hold up under the strain of additional output. MCR, which brought out its GT-R for filming of Hot Version 93, has been exacting its own brand of punishment on its tuned GT-R and is worried how long the transmission will last. It’s not clear if the tranny woes are due to the clutch plates or something else, but it’s been all but confirmed that dual-clutch gearboxes have an issue with additional torque since the friction surface is much smaller than on a stock (read: single plate) clutch. MCR’s best guesstimate is that the stock ‘box might only be able to hold up to the additional power for 12 months before problems begin arise. Now, we’re particularly interested in how Nissan is beefing up the tranny on the V-Spec to handle its rumored 600 hp.

[Sources: GTRBlog, NissanGTRProto]

 one of the engineers on hand mentioned that Godzilla’s suspension would be tweaked for the U.S. market. When asked why, the response wasn’t entirely clear, so we assumed that the changes would be made to adapt the GT-R to our less-than-perfect road surface. Apparently, that’s not the case.

The suspension revisions, which involved modifying the spring rate by 0.1kg/mm to make the GT-R’s coils a bit stiffer, will be accompanied by three harder engine mounts and a firmer transaxle mount that limits movement of the engine and gearbox under cornering forces. However, these changes aren’t just for vehicles bound for Stateside consumption. The tweaks have also been implemented on the latest batch of JDM vehicles and are going to be ported over to the UK models when they arrive next year. While the changes are minimal, it’s proof that Nissan’s engineers are dedicated to improving every facet of the GT-R to ensure that it remains on top. Or, to quote the GT-R’s chief vehicle engineer, Kazutoshi Mizuno, who spoke with Car, “The GT-R is my son… a son grows up and it’s my duty as father to keep improving it.”

[Source: Car]

The Nissan GT-R’s 7:29 lap record won’t stand for long if Chevrolet has anything to say about it. Speaking with InsideLine, Corvette Chief Engineer, Tadge Jeuchter, says that the ZR1, “will be able to take the production-car track record at any racetrack,” and that although Chevy doesn’t have a production version of the uber-Vette at the Nurburgring yet, they’re expecting a lap time of “seven minutes, twenty-something seconds.” That sounds like smack-talk to us. But while the ZR1 might have the potential to best the GT-R’s ‘Ring time, the 550-600 hp elephant in the room is the forthcoming GT-R V-Spec, which is already putting down (roughly-timed) laps around the North Loop in the 7:25 realm. Let the battle begin. We’re making popcorn now.

[Source: InsideLine]