A Classic - Reinvented
2005 Chevrolet Corvette Z06 - David Kimble IllustrationClose
For 2001 the hardtop Corvette offered some exciting performance upgrades and GM dipped into the past for a suitable nameplate: the Z06. Z06 was the designation for a special option package for race destined Corvettes in 1963 and was the brainchild of engineer Zora Arkus-Duntov.
The new Z06 was equipped to be a dual purpose car: one that is at home on both the race track and public roads. Track days for amateur race car drivers had become popular and the Corvette lineup now featured a worthy participant.
2005 Chevrolet Corvette Z06 LS6 Engine - David Kimble IllustrationClose
The star of the new Z06 was the LS6 engine which was named in honor of the 454 cu in. 425 hp motor available in 1971. It is based on the LS1 that powers the convertible and coupe Corvettes; both engines have 5.7 liters (346 cu in) of displacement. The increase is due to higher compression cylinder heads (LS6 > 10.5:1; LS1 > 10.1:1) with improved porting, larger fuel injectors, a more aggressive camshaft, stronger valve springs and better crankcase pressure management along with speedier oil return. Backing up the improvements (pun intended) was a less restrictive lighter weight titanium exhaust system. Red engine covers gave the LS6 some visual distinction.
2005 Chevrolet Corvette Z06 LS6 EngineClose
Worth noting is the 385 hp rating of the LS6, which is 10 hp more than the LS5 found in the 1990 ZR-1. The simpler and less pricey two valve single camshaft design had conclusively proved itself over the complex and expensive four valve / four cam concept.
2005 Chevrolet Corvette, 2001 LS1, Z06 LS6 Engine HP and Torque CurvesClose
The LS6 equipped Z06 is rated at 385 hp @ 6,000 RPM and the LS1 is 350 hp @ 5,600 RPM.