so a 1:1 setup like that would be showing a fair amount of boost in the charge pipe at idle and low throttle eh, because apparently "At idle your V.E. might be as low as 15% to 20%" http://www.rbracing-rsr.com/calcinjpulse.html.
bourne out by my recent improved mpg figures with this current CG10+t i,m running atm, ie, i,m having to run more throttle @ cruise on the M6 lately (judging by my vacuum gauge readings)