blasterman87...when i first bought my blaster i put an fmf setup just like your on it, i have boyesen reeds and port and polish with the lid removed on my airbox, all the mods you have now right?
I went from stock jet to a 270 after i installed my pipe, all ran well, then i had my port job and reeds done and took the airbox lid off, i then put a 310 main in and it loaded up terrible...ran like sh*t !!! i put the airbox lid back on and went back down to a 270 and it run great again..I think a 310 is too big for you.
just put a high flow airbox on mine and have v force reeds on the way in the mail now so ill prolly have to screw around with it again ..lol..but i guess it sall trial and error i suppose.
good luck, i'd try the 270 or 280 imo
hope that helps