Gas mix was right at E60/E61 - when I mash the gas it took a second or so to feel the power come on - not sure if that's normal lag and I just haven't been noticing it. Car felt good, no breaking up noted at all - I am using B58 coils with NGKs gapped to .022. On a side note after the second pull I got a vanos code that pushed the engine to reduced power. I turned off and on and it was reset, third pull had no issues.