LS-6 Stock Flow Numbers
SF600 3.900 Bore - 1-7/8 pipe

- Lift – Intake – Exhaust - %
.100 –--- 62 ------ 59 -----
.150 ---- 94 ------ 86 -----
.200 --- 126 ---- 108 -----
.250 --- 156 ---- 128 -----
.300 --- 184 ---- 143 -----
.350 --- 206 ---- 154 -----
.400 --- 224 ---- 163 -----
.450 --- 239 ---- 170 -----
.500 --- 251 ---- 176 -----
.550 --- 256 ---- 180 -----
.600 --- 257 ---- 183 -----

LS-1 Stock Flow Numbers
SF600 3.900 Bore - 1-7/8 pipe

- Lift – Intake – Exhaust - %
.100
.150
.200 --- 136 ---- 108 -----
.250
.300 --- 196 ---- 145 -----
.350
.400 --- 217 ---- 170 -----
.450
.500 --- 224 ---- 186 -----
.550 --- 227 ---- 192 -----
.600 --- 230 ---- 198 -----
.650 --- 233 ---- 200 -----

LS6
Unknown testing

- Lift – Intake – Exhaust - %
.100
.150
.200 --- 137 ---- 116 -----
.250
.300 --- 188 ---- 153 -----
.350
.400 --- 233 ---- 175 ----- 75.1
.450
.500 --- 260 ---- 193 -----
.550 --- 245 ---- 199 -----
.600 --- 245 ---- 200 -----
.650 --- 245 ---- 202 -----


LS6 CNC Ported

- Lift – Intake – Exhaust - %
.100
.150
.200 --- 142 ---- 118 -----
.250
.300 --- 209 ---- 156 -----
.350
.400 --- 257 ---- 189 -----
.450
.500 --- 283 ---- 220 -----
.550 --- 286 ---- 227 -----
.600 --- 287 ---- 231 -----
.650 --- 289 ---- 233 -----

AFR 205

SF600 3.900 bore – 1-7/8 pipe
205 cc intake port – 2.020/1.600

- Lift – Intake – Exhaust - %
.100
.150
.200 --- 144 ---- 116 -----
.250
.300 --- 208 ---- 170 -----
.350
.400 --- 255 ---- 206 -----
.450
.500 --- 287 ---- 221 -----
.550 --- 296 ---- 227 -----
.600 --- 302 ---- 232 -----
.650 --- 304 ---- 236 -----


AFR 225

SF600 4.125 bore – 1-7/8 pipe (per AFR)
225 cc intake port – 2.080/1.600

- Lift – Intake – Exhaust - %
.100
.150
.200 --- 150 ---- 120 -----
.250
.300 --- 220 ---- 178 -----
.350
.400 --- 266 ---- 220 -----
.450
.500 --- 304 ---- 241 -----
.550 --- 313 ---- 246 -----
.600 --- 320 ---- 250 -----
.650 --- 245 ---- 202 -----



ET Performance 215 – 11*
SF600 – 3.900 bore – no pipe
215 cc intake port – 2.040/1.570

- Lift – Intake – Exhaust - %
.100 --- 74 ----- 57 ------
.150
.200 --- 152 ---- 106 -----
.250
.300 --- 219 ---- 150 -----
.350
.400 --- 266 ---- 190 -----
.450
.500 --- 301 ---- 204 -----
.550 --- 312 ---- 208 -----
.600 --- 320 ---- 211 -----
.650 --- 323 ---- 214 -----

ET Performance 225cc – 11*
SF600 – 4.000 bore – no pipe
225 cc intake port – 2.080/1.570

- Lift – Intake – Exhaust - %
.100 --- 71 ----- 57 ------
.150
.200 --- 153 ---- 114 -----
.250
.300 --- 208 ---- 164 -----
.350
.400 --- 265 ---- 204 -----
.450
.500 --- 308 ---- 224 -----
.550 --- 320 ---- 228 -----
.600 --- 328 ---- 231 -----
.650 --- 332 ---- 234 -----
.700 --- 320 ---- 236 -----

ET Performance 240 – 11*
SF600 – 4.000 bore – no pipe
245 cc intake port – 2.100/1.570

- Lift – Intake – Exhaust - %
.100 --- 73 ----- 57 ------
.150
.200 --- 152 ---- 114 -----
.250
.300 --- 109 ---- 164 -----
.350
.400 --- 266 ---- 204 -----
.450
.500 --- 312 ---- 224 -----
.550 --- 327 ---- 228 -----
.600 --- 338 ---- 231 -----
.650 --- 346 ---- 234 -----
.700 --- 320 ---- 236 -----


ET Performance 255cc – 11*
SF600 – 4.000 bore – no pipe
255 cc intake port – 2.100/1.570

- Lift – Intake – Exhaust - %
.100 --- 71 ----- 55 ------
.150
.200 --- 147 ---- 113 -----
.250
.300 --- 227 ---- 159 -----
.350
.400 --- 285 ---- 213 -----
.450
.500 --- 324 ---- 229 -----
.550 --- 337 ---- 234 -----
.600 --- 349 ---- 236 -----
.650 --- 357 ---- 239 -----
.700 --- 360 ---- 242 -----

ET Performance 265cc – 11*
SF600 – 4.100 bore – no pipe
265 cc intake port – 2.100/1.570

- Lift – Intake – Exhaust - %
.100 --- 73 ----- 55 ------
.150
.200 --- 155 ---- 113 -----
.250
.300 --- 212 ---- 159 -----
.350
.400 --- 271 ---- 213 -----
.450
.500 --- 323 ---- 229 -----
.550 --- 338 ---- 234 -----
.600 --- 352 ---- 236 -----
.650 --- 365 ---- 239 -----
.700 --- 373 ---- 242 -----
.750 --- 376 ---- 243 -----

ET Performance 5.3– 15*
SF600 – 3.900 bore – no pipe
230cc intake port – 2.055/1.570

- Lift – Intake – Exhaust - %
.100 --- 82 ----- 58 ------
.150
.200 --- 162 ---- 115 -----
.250
.300 --- 210 ---- 154 -----
.350
.400 --- 265 ---- 187 -----
.450
.500 --- 297 ---- 209 -----
.550 --- 310 ---- 214 -----
.600 --- 320 ---- 222 -----
.650 --- 329 ---- 227 -----



ET Performance 5.7– 15*
SF600 – 3.900 bore – no pipe
224cc intake port – 2.020/1.570

- Lift – Intake – Exhaust - %
.100 --- 68 ----- 56 ------
.150
.200 --- 143 ---- 112 -----
.250
.300 --- 196 ---- 158 -----
.350
.400 --- 247 ---- 190 -----
.450
.500 --- 280 ---- 206 -----
.550 --- 292 ---- 210 -----
.600 --- 303 ---- 214 -----

ET Performance 5.7– 15*
SF600 – 3.900 bore – no pipe
224cc intake port- 2.020/1.570

- Lift – Intake – Exhaust - %
.100 --- 68 ----- 56 ------
.150
.200 --- 143 ---- 112 -----
.250
.300 --- 196 ---- 158 -----
.350
.400 --- 247 ---- 190 -----
.450
.500 --- 280 ---- 206 -----
.550 --- 292 ---- 210 -----
.600 --- 303 ---- 214 -----
.650 --- 307 ---- 216 -----
.700 --- 311 ---- 218 -----


Dart 225cc
Roll Clean up - 230cc
2.055/1.600 x 11/32 valve
Bret Bauer Racing Engines

- Lift - Intake - Exhaust - %
.200 --- 144 --- 112 ---- 78%
.300 --- 204 --- 151 ---- 74%
.400 --- 260 --- 193 ---- 74%
.450 --- 282
.500 --- 297 --- 214 ---- 72%
.550 --- 307
.600 --- 312 --- 225 ---- 72%
.650 --- 316
.700 --- 320 --- 232 ---- 72%

(thanks KMS)
Patriot Stage 1 Head
Stock valves (2.0 intake)
flowed on a stock bore
Exhaust was flowed with a pipe
64cc chamber
Intake runner at 227 +/- a couple

lift --- intake - exhaust
.100 -- 71.4 --- 59.1
.200 - 146.1 -- 118.1
.300 - 212.5 -- 159.7
.400 - 250.3 -- 190.9
.500 - 280.7 -- 206.7
.550 - 291.2 -- 214.2
.600 - 299.8 -- 219.2