No matter, Chevy decided to up the ante and tune the engine for a bit more than the measly 568 horsepower typically produced from the 6.2-liter LSA V8. Instead, according to LSXTV, the ZL1 will crank out something slightly north of 570 horsepower - coinciding with an earlier report in mid-June by Leftlane that confirmed the ZL1's horsepower would surpass that of the CTS-V.
So how did Chevy do it? The 556 horsepower LSA V8 utilizes a 1.9-liter supercharger and a 9.0:1 compression ratio in the CTS-V, while the LS9 derivative of the engine produces 638 horsepower thanks to a 2.3-liter supercharger and a 9.1:1 compression ratio in the range-topping Corvette ZR1. Chevy apparently decided to compromise and make use of the additional upper space under the hood of the Camaro and crammed in a larger intercooler and intake manifold, allowing for increased output.
The result, according to "extremely credible" sources speaking with the magazine was an SAE-verified horsepower number "north of 570 horsepower."
Given the incessant rumors Ford may enter the 600-horsepower+ realm with its next GT500, it's very likely Chevy will step up its game with the ZL1 in order to stay in the game.
1.'Rumor: Official 2012...' view
2.'Chevy Camaro ZL1...' view