I think he just wanted someone to say it was ok… and didn’t care about the source. So he could buy what he wanted…
in actually that 13% will probably (with increased pressures, and all that other thermo crap) be around the 6-8% region. Being that its a turbo (beating the dead horse) smaller is gonna restrict the flow, decreasing airflow… Heres a Question… Who thinks this would be enough difference to have to goof up the A/F ratio (not turbo person, so idk how crucial this is). with the pressure in the exhaust slowing the turbo down slightly and getting less air in the motor, and flooding the motor (yes i know its not gonna flood the motor, but you know what i’m talking about). Maybe even a RETUNE! Of course thats all exagerated to prove a point… and the difference probably wont be noticeable. But Hey its His money let him use it his way
anyway… from a scientific stand point, I go with a thumbs down to the smaller exhaust cause the .14 difference DOES make a difference