2010 Camaro LS3 M6 E38. All i have done to it is the cam essentially. Stock intake, stock engine(aside from the cam, pushrods, springs, and trunnions), tsp exh manifold, straight pipe. Since the compression ratio hasnt changed, cant i still run 87? Low octane spark tables are stock as well. 229/242 .600"/.600" 112 LSA 109 ICL