CNC Ported Heads for 318 Poly?

pittsburghracer said

For a how many cfm
Head.

Click to expand...

11/32 int/exh
.10 75/63
.20 158/105
.30 218/130
.40 241/171
.50 250/192
.55 256/198
.60 260/201
.65 264/205

5/16 int/exh
.10 79/67
.20 162/109
.30 222/134
.40 245/175
.50 254/196
.55 260/202
.60 264/205
.65 268/209

5/16 with valve work int/exh
.10 72/67
.20 141/104
.30 211/133
.40 248/175
.50 263/198
.60 266/211
.70 271/217