Quote:

So if I uses those number for OOTB -1's 282/185 and he increased flow 42/12 it would be 332/197. Here are my flow numbers:

----- Intake -----
Lift OTB Ported Change
100 65 69 4
200 126 140 14
300 183 195 12
400 232 247 15
450 251 264 13
500 265 278 13
550 270 294 24
600 269 301 32
650 272 309 37
700 274 316 42


------ Exhaust ------
Lift OTB Ported Change
100 61 70 9
200 115 116 1
300 153 150 -3
400 182 181 -1
450 190 192 2
500 196 201 5
550 201 207 6
600 203 212 9
650 206 217 11
700 209 221 12

"Int / Exh %"
101%
83%
77%
73%
73%
72%
70%
70%
70%
70%



This is what my 440-1 heads (CNC 325 from Indy, fixed by Jim LaRoy in Idaho) flow. Before is as recieved, after is after his valve job. They could use bigger intakes to help the mid flows:

lift............before..........after

.100..........69/61.........80/68
.200........144/123......158/134
.300........215/172......226/183
.400........274/217......277/229
.500........321/251......320/265
.600........346/280......349/290
.700........362/301......368/307
.800........372/317......372/327