Engine of the Month: GM LT1 6,2-litre V8

  • The iconic small-block gets a big upgrade.
  • GM LT1 6.2-litre V-8
Date:17 February 2013 Tags:, , ,

To the delight of engine nerds everywhere, GM has unveiled its fifth-generation small-block V8, which will debut in the all-new seventh-generation Chevy Corvette (sadly, not available in South Africa). The all-aluminium 6,2-litre engine combines tradition – 112 mm between bore centres, 90-degree-angle, and in-block camshaft, pushrods, and overhead valves – and new features.

A hydraulic cam phaser adjusts cam timing relative to engine speed, which improves output across the rev range. Direct injection provides precise combustion control, which means (among other things) cooler piston heads – important now that the compression ratio is up to 11,5:1. And under cruising conditions, the engine conserves fuel by running like a 3,1-litre V4, shutting down four sets of valves and fuel injectors. To achieve cylinder deactivation, a solenoid turns off hydraulic pressure to the lifters, which then absorb the cam motion rather than transferring it to the pushrods. The new engine promises an estimated 335 kW, 610 N.m and a 0-to-100 km/h sprint time in under 4 seconds – all while delivering at least 9 litres/100 km fuel economy. That’s having your sports car cake and eating it, too. – Ben Wojdyla

Latest Issue :

Jan-February 2022