I would think the benefit wouldn't be very noticable. It does great for 93 gas because the octane is so low. Your high octane is enough to run high boost so alcohol isn't really needed. I think it will help a little in the fact that it will help cool the air charge and cylinder temps some. I'm sure some people here have tried both at once so hopefully they will chime in. I've only run 93 octane and a single nozzle SMC kit. It did give me 9 more pounds of boost with no knock with the 93 though.