GM To Launch LF3 Engine in 2013: 3.6-Liter Twin-Turbo V6
No matter, we still have it, and on it is mentioned a new engine called the LF3 and described as "ENGINE GAS, 6 CYL, 3.6L, SIDI, DOHC, VVT, ALUM, TWIN TURBO". So, the unit has a 3.6-liter aluminum block, direct injection, variable valve timing and two turbos.
The engine has not been mentioned rumored before, when it was said that it was a specially developed Camaro concept unit developed with Jay Leno for some sort of auto show. It was rumored to have 420 horsepower, which would put the Ford 3.5-liter EcoBoost to shame. There should be an even smaller 3-liter twin-turbo coming, based on the same block.
If we remember correctly, that’s the engine promised for the ATS-V, which would explain why the “LS3” isn’t shown anywhere else in the document. GM would have marketed that car as a brand new model, not a version of the ATS.
Story via Motor Authority