Street Demon or Edelbrock AVS2 or ?

Q16? Is that a type of fuel. Sure you can flow more fuel. Not sure what you mean by cannot flow 25% more fuel. For reasons known only by Edel these large carbs [ 800 cfm ] come with small 0.093" n/seats. In contrast, the smaller Carter 625 cfm Comp Series came with 0.101" n/seats & there are two larger sizes available, 111 & 120. Increasing jet size is self explanatory. Get bigger jets or drill them to a larger size.