Flow Numbers BBC Oval Ports

Intake Valve    2.19        Exhaust Valve    1.88        Port Volume    260 cc

4.300" Bore @ 28" Hg

Intake           Stock                    Stage 1            Swirl ( rpm)

0.200                                                145                       

0.300                   175                       205                        1900

0.400                   218                       265                        2100

0.500                   236                       302                        2700

0.600                   251                       302                        3000

0.700                   255                       297                        3000

Exhaust

0.200

0.300                   128                    142

0.400                   140                    169

0.500                   149                    192

0.600                   153                    209

0.700                   154                    225

* Exhaust Ports flowed without a pipe --- with 2.0" X 5" Pipe, exhaust port flows 255 cfm