In a classic illustration of 'racing improves the breed' Nissan has applied the lessons learned from the Nismo GT-R entries in the GT3 class at this year's Nürburgring 24-Hour race to the road-going production GT-R, with a series of upgrades aimed at sharpening the throttle response of its 405kW, 3.8-litre twin-turbocharged V6 engine, and improving ride and handling.

New high-output injectors control fuel-injection more precisely to improve mid-range and top-end response, while a new relief valve in the turbocharger bypass prevents the sudden loss of boost pressure you get when a conventional wastegate 'pops its top'.

There's also a new sump baffle to reduce oil surge; Nissan says this helps keep the oil pressure stable - which is obvious - but also claims it will reduce rotational friction in high-performance driving.

And finally, they've beefed up the half-shafts front and rear, to improve reliability under racing conditions.

CHASSIS AND SUSPENSION

Reinforcements to the dash panel bar and instrument panel member have increased body-shell rigidity in the crucial area just below the windscreen, which Nissan says improves suspension control.

They also learned some interesting things at the 'Ring about just how much the tyres and suspension bushes flex under racing conditions, so they've revised the dampers, springs and front anti-roll bar to lower the centre of gravity.

Then they put in new cam bolts on the front suspension, so that the camber can be more precisely adjusted for improved stability in fast corners.

Nissan SA says the upgraded GT-R will be made available in South Africa, but exact specs, timing and pricing have yet to be decided.