" " "Number of intake valves per cylinder (usually 1, 2 for 4-valve) p 19" "Outside diameter of one intake valve in inches p 19" "Avg dia of port & runner (enter 'C' to calc from CCs or width/ht) p 20" "Length of port & runner from plenum to valve stem in throat, inches p 20" "Port/valve flow efficiency (enter 'C' to calc from flow bench data) p 20" "Flow efficiency of runner (enter 'C' to calc from flow bench data) p 22" "Single plane, dual plane, etc (enter 'C' to view options) p 24" "Blocked crossover, heat shields, etc = N; full heat to intake = Y p 25" "CFM flow of all carbs/throttle bodies @ 1.5''Hg (enter 'C' to calc) p 26" "Enter 'Y' if carb secondaries only open at high flow demand p 27" " " "Enter 'Y' or press to accept values and return to MAIN MENU" " " " " " "