taps

i have a tube chassis beretta with 871 blower,had 2 825 carbs,12psi boost car ran a best of 8.58 160 in 1/4.i saw a chart in the bds catalog to figure cfm requirments for blower engines and according to it i need about 2100 cfm.so heres my question,i changed to 2 1095 carbs and upped the boost to 18 psi,any ideas on how performance gain this may be worth with proper tune.tim mcamis site has a boost hp calculator it says just upping the boost is worth about 200 hp.any ideas or suggestions.