HSV power-up signalled by '08 Corvette

The big-bore, powered-up new generation small-block V8 just debuted in the 2008 US-market Corvette could be on its way Down Under.

The new engine, debuted last month in the latest model of General Motors' all-American sportscar, produces around 320kW/590Nm -- a handy increase on the 307kW/550Nm output of HSV's current bespoke eight.

Dubbed LS3, it displaces 6.2-litre thanks to a mild bore job (103.25 v 101.62mm) but the main performance enhancements are better breathing via bigger valves and high-flow cylinder-heads sourced from GM's monster 7.0-litre LS7 racing 'Vette. Other changes include a new cam and a revised valvetrain to allow for the cam and valve changes.

In its Corvette installation the engine dumps into a two-mode exhaust system with uses vacuum-actuated valves to open a 'freeflow' route for extra power and noise. GM claims it frees up an extra 4kW and 5Nm.

Though such an exhaust system would be unlikely to make it Down Under, the engine itself is almost certain to under the bonnet of HSV products. The question is how soon.

Just as Holden's introduction of Active Fuel Management cylinder-deactivation-equipped V8s is expected to take place as part of its  VE 'Series IIs' upgrade (more here), the new LS3 engine would be a logical candidate for the first update of HSV's E Series VE-based cars.

The arrival of the LS3 engine would also further separate the HSV models from their home brand counterparts -- a stated aim of the Tom Walkinshaw owned organisation.

Though some pundits suggest that the LS3 engine will be used only to differentiate HSV's flagship GTS model, this is unlikely. The Carsales Network understands that HSV would require 40-60kW margin between engine types before it would follow that course of action.

One other feature launched in the 08 Corvette will likely accompany the new engine into the HSV line-up -- a new faster shifting six-speed auto complete with Euro-style paddle gearshift actuation.

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