C Conventional shaped nose on the lobe D Dwell nose. Dwell lobes are often used when there is a lift rule, such as NHRA stock classes. Dwell lobes are usually not well suited for higher RPM applications.
R RPM for lobes suited for higher RPM applications or motors with numerically high rocker ratios,
T Torque for lobes suited for lower RPM or motors with numerically low rocker ratios.
S Symmetrical lobes opening and closing ramps the same. A Asymmetrical lobes usually have a slower closing rate to help prevent valve bounce.
Valve lash numbers are given at the lobe and have to be multiplied by the rocker ratio to give the valve lash at the valve. Lobe lash numbers of less than .012" are considered "tight lash" and tend to be more aggressive lobes.
Master Adv 050 200 Lift Lash Type
HR235/290 235 180 099 .290 .000 CRS
HR247/306 247 192 112 .306 .000 CRA
HR255/256 255 195 094 .256 .000 CRA
HR254/275 254 195 103 .275 .000 CRA
HR253/231 253 198 076 .231 .000 CRA
HR253/305 253 200 117 .305 .000 CRA
HR262/280 262 203 110 .280 .000 CRA
HR260/290 260 203 112 .290 .000 CRA
HR268/290 268 204 112 .290 .000 CRS
HR259/314 259 204 122 .314 .000 CRA
HR254/288 254 206 114 .288 .000 CRS
HR258/320 258 206 127 .320 .000 CTS
HR262/333 262 206 127 .333 .000 CTA
HR262/345 262 206 128 .345 .000 CRA
HR266/360 266 208 131 .360 .000 CRA
HR267/282 267 210 115 .282 .000 CRA
HR262/300 262 210 124 .300 .000 CRA
HR262/312 262 210 129 .312 .000 0
HR266/312 266 210 125 .313 .000 CRA
HR277/319 277 210 126 .319 .000 CRA
HR266/333 266 210 130 .333 .000 CTA
HR268/271 268 211 112 .271 .000 CRA
HR268/277 268 211 116 .277 .000 CRS
HR268/297 268 211 119 .297 .000 CRS
HR260/340 260 212 135 .340 .000 CTS
HR272/288 272 213 119 .288 .000 CRA
HR276/273 276 214 110 .273 .000 CRA
HR268/304 268 214 121 .304 .000 CRS
HR266/325 266 214 135 .325 .000 CTA
HR271/312 271 215 129 .313 .000 CRA
HR275/360 275 216 138 .360 .000 CRA
HR270/313 270 218 132 .313 .000 CRA
HR272/320 272 218 135 .320 .000 CRA
HR270/330 270 218 138 .330 .000 CTS
HR270/340 270 218 139 .340 .000 CTS
HR270/363 270 218 142 .363 .000 CTS
HR279/288 279 220 124 .288 .000 CRA
HR276/301 276 220 130 .301 .000 CRA
HR272/311 272 220 128 .311 .000 CRS
HR276/311 276 220 133 .311 .000 CRA
HR278/340 278 220 138 .340 .000 CRA
HR278/320 278 222 136 .320 .000 CRA
HR274/325 274 222 141 .325 .000 CTA
HR274/335 274 222 141 .335 .000 CTA
HR279/338 279 222 140 .338 .000 CTA
HR273/340 273 222 144 .340 .000 CTA
HR285/283 285 224 124 .283 .000 CRS
HR275/330 275 224 143 .330 .000 CRS
HR276/335 276 224 145 .335 .000 CTS
HR276/340 276 224 144 .340 .000 CTA
HR284/360 284 224 143 .360 .000 CRA
HR281/311 281 225 137 .311 .000 CRA
HR280/338 280 225 144 .338 .000 CRA
HR283/345 283 225 143 .345 .000 CRA
HR280/350 280 225 145 .350 .000 CRA
HR283/350 283 225 143 .350 .000 CRA
HR283/360 283 225 145 .360 .000 CRA
HR280/320 280 226 141 .320 .000 CRA
HR284/325 284 226 138 .325 .000 CRA
HR276/360 276 226 149 .360 .000 CRS
HR285/278 285 228 127 .278 .000 CRA
HR285/301 285 228 136 .301 .000 CRA
HR281/312 281 228 134 .312 .000 CRS
HR280/325 280 228 145 .325 .000 CTA
HR283/335 283 228 143 .335 .000 CRA
HR280/340 280 228 148 .340 .000 CTA
HR285/342 285 228 145 .342 .000 CRA
HR282/288 282 230 140 .288 .000 DRS
HR286/311 286 230 140 .311 .000 CRA
HR282/312 282 230 133 .312 .000 CRS
HR286/320 286 230 143 .320 .000 CRA
HR282/328 280 230 149 .328 .000 DRS
HR288/350 288 230 148 .350 .000 CRA .350 X 1.6 = .560
HR281/353 281 230 153 .353 .000 CTA
HR288/360 288 230 150 .360 .000 CTA
HR286/375 286 230 152 .375 .000 CRA
HR287/310 287 232 142 .310 .000 CRA
HR290/340 290 232 145 .340 .000 CRA
HR299/343 299 232 146 .343 .000 CRA
HR299/360 299 232 148 .360 .000 CRA
HR288/378 288 232 154 .378 .000 CRA
HR289/329 289 233 148 .329 .000 CRA
HR291/278 291 234 130 .278 .000 CRA
HR292/340 292 234 146 .339 .000 CRA
HR284/355 284 234 157 .355 .000 DTS
HR292/378 292 234 152 .378 .000 CRA .378 X 1.6 = .605
HR290/350 290 235 154 .350 .000 CTA
HR288/288 288 236 146 .288 .000 DRS
HR291/300 291 236 137 .300 .000 CRA
HR294/342 294 236 149 .342 .000 CRA
HR290/343 290 236 154 .343 .000 CTA
HR288/347 288 236 157 .347 .000 CTS
HR288/355 288 236 155 .355 .000 CTA
HR288/355 288 236 156 .355 .000 CTA
HR288/355 288 236 156 .355 .000 CTA
HR286/380 286 236 159 .380 .000 CTS
HR294/365 294 237 154 .365 .000 CRA
HR295/300 295 238 140 .300 .000 CRA
HR291/312 291 238 141 .312 .000 CRS
HR296/325 296 238 148 .325 .000 CRA
HR296/350 296 238 151 .350 .000 CRA
HR296/356 296 238 153 .356 .000 CRA
HR289/360 289 238 161 .360 .000 DTS .360 X 1.6 = .576
HR291/360 291 238 158 .360 .000 CRS
HR296/378 296 238 156 .378 .000 CRA
HR293/341 293 239 152 .341 .000 CRS
HR292/311 292 240 139 .311 .000 CRS
HR296/311 296 240 155 .311 .000 DRS
HR308/311 308 240 144 .311 .000 CRA
HR298/340 298 240 153 .340 .000 CRA
HR307/343 307 240 152 .343 .000 CRA
HR307/360 307 240 154 .360 .000 CRA
HR298/332 298 242 153 .332 .000 CRS
HR300/342 300 242 154 .342 .000 CRA
HR292/350 292 242 164 .350 .000 DTS
HR300/350 300 242 154 .350 .000 CRA
HR294/360 294 242 164 .360 .000 CTS
HR295/368 295 242 160 .368 .000 CRS
HR300/370 300 242 159 .370 .000 CRA
HR306/360 306 243 157 .360 .000 CRA
HR296/288 296 244 153 .288 .000 DRS
HR298/300 298 244 152 .300 .000 DRS
HR302/342 302 244 156 .342 .000 CRA
HR296/360 296 244 163 .360 .000 CTA
HR296/360 296 244 163 .360 .000 CTA
HR296/360 296 244 163 .360 .000 CTA
HR302/375 302 244 162 .375 .000 CRA
HR297/276 297 245 145 .276 .000 DRA
HR303/316 303 245 151 .316 .000 CRA
HR303/327 303 245 154 .327 .000 CRA
HR298/358 298 246 164 .358 .000 CTA
HR303/365 303 246 162 .365 .000 CRA
HR297/370 297 246 168 .370 .000 CTS
HR303/378 303 246 164 .378 .000 CRA
HR304/403 304 246 166 .403 .000 CRA
HR306/339 306 247 157 .339 .000 CRA
HR301/234 301 248 144 .234 .000 DTS
HR300/288 300 248 157 .288 .000 DTS
HR299/290 299 248 145 .290 .000 CRS
HR304/300 304 248 152 .300 .000 DRS
HR305/300 305 248 147 .300 .000 CRA
HR300/305 300 248 160 .305 .000 DRS
HR316/311 316 248 150 .311 .000 CRA
HR304/312 304 248 163 .312 .000 DRS
HR303/317 303 248 164 .317 .000 DRS
HR306/340 306 248 159 .340 .000 CRA
HR301/350 301 248 165 .350 .000 CTS
HR302/353 302 248 168 .353 .000 CRA
HR300/360 300 248 168 .360 .000 CTA
HR315/360 315 248 161 .360 .000 CRA
HR306/378 306 248 165 .378 .000 CRA
HR302/292 302 250 160 .292 .000 DRS
HR307/311 307 250 152 .311 .000 CRA
HR302/323 302 250 165 .323 .000 DRA
HR302/328 302 250 169 .328 .000 DRS
HR303/331 303 250 162 .331 .000 CRA
HR308/342 308 250 160 .342 .000 CRA
HR313/365 313 250 164 .365 .000 CRA
HR303/375 303 250 168 .375 .000 CRS
HR***/306 0 251 .306 .000 0
HR305/276 305 252 151 .276 .000 DRA
HR307/280 307 252 148 .280 .000 DRS
HR306/290 306 252 158 .290 .000 DRS
HR308/300 308 252 156 .300 .000 DRS
HR306/303 306 252 160 .303 .000 DRS
HR305/316 305 252 162 .316 .000 DRA
HR304/317 304 252 170 .317 .000 DTS
HR304/328 304 252 170 .328 .000 DTS
HR314/341 314 252 162 .341 .000 CRA
HR304/342 304 252 172 .342 .000 DTS
HR304/360 304 252 171 .360 .000 CTA
HR317/360 317 252 165 .360 .000 CRA
HR302/365 302 252 173 .365 .000 CTS
HR304/365 304 252 168 .365 .000 0
HR304/365 304 252 168 .365 .000 CRS
HR304/365 304 252 168 .365 .000 0
HR309/382 309 252 170 .382 .000 CRA
HR307/395 307 252 173 .395 .000 CRA
HR305/280 305 254 144 .280 .000 CRS
HR305/290 305 254 148 .290 .000 CRS
HR306/292 306 254 163 .292 .000 DTS
HR308/303 308 254 162 .303 .000 DRS
HR306/305 306 254 164 .305 .000 DRS
HR307/315 307 254 175 .315 .000 DTS
HR307*317B 307 254 175 .317 .000 DTS
HR307/317 307 254 170 .317 .000 DTS
HR307B 307 254 175 .317 .000 DTS
HR307/322 307 254 175 .322 .000 DTS
HR312/328 312 254 160 .328 .000 CRA
HR308/350 308 254 171 .350 .000 CTS
HR321/368 321 254 167 .368 .000 CRA
HR307/290 307 255 166 .290 .000 DTS
HR306/311 306 255 157 .311 .000 CRS
HR306/316 306 255 159 .316 .000 CRS
HR306/320 306 255 161 .320 .000 CRS
HR306/325 306 255 161 .325 .000 CRS
HR313/327 313 255 160 .327 .000 CRA
HR307/330 307 255 170 .330 .000 DRA
HR320/342 320 255 164 .342 .000 CRA
HR320/350 320 255 163 .350 .000 CRA
HR309/257 309 256 162 .257 .000 DTS
HR309/303 309 256 165 .303 .000 DRS
HR313/303 313 256 155 .303 .000 CRA
HR314/332 314 256 164 .332 .000 CRA
HR309/342 309 256 170 .342 .000 CRA
HR314/342 314 256 166 .342 .000 CRA
HR314/344 314 256 166 .344 .000 CRA
HR308/355 308 256 171 .355 .000 0
HR313/278 313 257 159 .278 .000 DRS
HR313/310 313 257 162 .310 .000 DRS
HR311/276 311 258 156 .276 .000 DRA
HR312/290 312 258 164 .290 .000 DRS
HR309/311 309 258 160 .311 .000 CRS
HR312/311 312 258 167 .311 .000 DRS
HR315/311 315 258 158 .311 .000 CRA
HR316/318 316 258 161 .318 .000 CRA
HR310/360 310 258 176 .360 .000 CTA
HR325/360 325 258 169 .360 .000 CRA
HR315/382 315 258 176 .382 .000 CRA
HR311/310 311 259 164 .310 .000 DRS
HR311/280 311 260 148 .280 .000 CRS
HR310/284 310 260 151 .284 .000 CRS
HR311/290 311 260 152 .290 .000 CRS
HR314/290 314 260 166 .290 .000 DRS
HR315/295 315 260 160 .295 .000 DRS
HR313/298 313 260 176 .298 .000 DTS
HR312/303 312 260 168 .303 .000 DRA
HR314/303 314 260 168 .303 .000 DRS
HR312/305 312 260 170 .305 .000 DRS
HR314/310 314 260 169 .310 .000 DRS
HR318/312 318 260 161 .312 .000 CRA
HR318/327 318 260 165 .327 .000 CRA
HR313/328 313 260 178 .328 .000 DTS
HR318/342 318 260 168 .342 .000 CRA
HR325/343 325 260 168 .343 .000 CRS
HR326/350 326 260 170 .350 .000 CRA
HR312/355 312 260 173 .355 .000 CRS
HR327/360 327 260 171 .360 .000 CRA
HR314/365 314 260 176 .365 .000 CRS
HR325/366 325 260 172 .366 .000 CRA
HR325/390 325 260 175 .390 .000 CRA .390 X 1.6 = .624 X 1.7 = .663 X 1.8 = .702
HR318/300 318 262 166 .300 .000 DRS
HR320/311 320 262 163 .311 .000 CRA
HR315/328 315 262 174 .328 .000 DRS
HR320/328 320 262 166 .328 .000 CRA
HR320/332 320 262 169 .332 .000 CRA
HR327/335 327 262 167 .335 .000 CRA
HR315/341 315 262 176 .341 .000 DRS
HR328/360 328 262 173 .360 .000 CRA
HR330/365 330 262 173 .365 .000 CRA
HR314B 314 262 179 .365 .000 DRS
HR319/382 319 262 170 .382 .000 CRA
HR324/410 324 262 180 .410 .000 CRS
HR318/341 318 263 176 .341 .000 DRS
HR327/350 327 263 170 .350 .000 CRA
HR317/318 317 264 173 .318 .000 DTS
HR322/344 322 264 172 .344 .000 CRA
HR316/370 316 264 179 .370 .000 CRS
HR327/380 327 264 179 .380 .000 CRA
HR320/382 320 264 181 .382 .000 CRA
HR319/385 319 264 180 .385 .000 CRA
HR316/280 316 265 151 .280 .000 CRS
HR321/280 321 265 169 .280 .000 DRS
HR318/284 318 265 154 .284 .000 CRS
HR319/303 319 265 173 .303 .000 DRS
HR321/310 321 265 172 .310 .000 DRS
HR316/311B 316 265 165 .311 .000 CRS
HR323/312 323 265 164 .312 .000 CRA
HR323/318 323 265 167 .318 .000 CRA
HR323/327 323 265 168 .327 .000 CRA
HR318/340 318 265 177 .340 .000 DRA
HR330/342 330 265 172 .342 .000 CRA
HR324/360 324 265 175 .360 .000 CRA
HR329/365 329 265 174 .365 .000 CRA
HR330/366 330 265 177 .366 .000 CRA
HR318/287 318 266 166 .287 .000 DRA
HR319/310 319 266 176 .310 .000 DRS
HR318/311 318 266 175 .311 .000 DRA
HR334/315 334 266 164 .315 .000 CRA
HR332/323 332 266 167 .323 .000 CRA
HR331/333 331 266 170 .333 .000 CRA
HR334/365 334 266 177 .365 .000 CRA
HR321/290 321 267 173 .290 .000 DRS
HR322/298 322 267 178 .298 .000 DRS
HR322/304 322 268 181 .304 .000 DRS
HR326/312 326 268 167 .312 .000 CRA
HR322/313 322 268 182 .313 .000 DRS
HR322/328 322 268 184 .328 .000 DRS
HR335/342 335 268 174 .342 .000 CRA
HR333/343 333 268 174 .343 .000 CRS
HR335/360 335 268 177 .360 .000 CRA
HR331/365 331 268 179 .365 .000 CRA
HR325/365 325 269 187 .365 .000 DRS
HR320/284 320 270 157 .284 .000 CRS
HR326/284 326 270 154 .284 .000 CRS
HR322/311 322 270 178 .311 .000 DRA
HR328/312 328 270 169 .312 .000 CRA
HR336/323 336 270 170 .323 .000 CRA
HR329/332 329 270 175 .332 .000 CRA
HR335/335 335 270 174 .335 .000 CRA
HR329/342 329 270 177 .342 .000 CRA
HR336/350 336 270 177 .350 .000 CRA
HR337/360 337 270 179 .360 .000 CRA
HR335/390 335 270 184 .390 .000 CRA
HR327/365 327 271 189 .365 .000 DRS
HR325B 325 271 189 .365 .000 DRS
HR339/381 339 271 180 .381 .000 CRA
HR334/311 334 272 185 .311 .000 DRA
HR325/318 325 272 181 .318 .000 DTS
HR330/318 330 272 172 .318 .000 CRA
HR324/323 324 272 189 .323 .000 DTS
HR324/328 324 272 190 .328 .000 DRS
HR337/333 337 272 175 .333 .000 CRA
HR324/365 324 272 189 .365 .000 DRS
HR324/370 324 272 185 .370 .000 0
HR335/380 335 272 186 .380 .000 CRA
HR335/410 335 272 188 .410 .000 CRS
HR328/311 328 274 189 .311 .000 DRS
HR342/318 342 274 172 .318 .000 CRA
HR342/325 342 274 174 .325 .000 CRA
HR328/328 328 274 190 .328 .000 DRS
HR333/312 333 275 173 .312 .000 CRA
HR334/332 334 275 179 .332 .000 CRA
HR334/356 334 275 183 .356 .000 CRA
HR339/360 339 275 183 .360 .000 CRA
HR339/381 339 275 184 .381 .000 CRA
HR345/342 345 278 182 .342 .000 CRA
HR345/360 345 278 186 .360 .000 CRA
HR341/410 341 278 194 .410 .000 CRA
HR333/365 333 279 197 .365 .000 DRS
HR338/312 338 280 176 .312 .000 CRA
HR338/318 338 280 178 .318 .000 CRA
HR339/332 339 280 183 .332 .000 CRA
HR339/356 339 280 188 .356 .000 CRA
HR347/360 347 283 189 .360 .000 CRA
H245/270 245 195 103 .270 .000 CTA
H254/267 254 201 104 .267 .000 CRA
H255/267 255 202 103 .267 .000 CTA
H257/273 257 204 109 .273 .000 CTA
H270/280 270 204 110 .280 .000 CRA
H258/274 258 205 108 .274 .000 CTA
H255/285 255 205 114 .285 .000 CTA
H262/288 262 207 117 .288 .000 CTA
H274/280 274 208 115 .280 .000 CRA
H260/294 260 210 120 .294 .000 CTA
H262/280 262 212 119 .280 .000 CTA
H280/294 280 214 122 .294 .000 CRS
H266/308 266 214 126 .306 .000 CRA
H265/302 265 215 125 .302 .000 CTA
H283/272 283 216 114 .272 .000 CRA
H265/286 265 216 123 .286 .000 CRA
H264/310 264 216 128 .310 .000 CTA
H262/297 262 218 128 .297 .000 CTA
H272/305 272 218 125 .305 .000 CRA
H286/282 286 220 120 .282 .000 CRA
H270/307 270 220 130 .307 .000 CTA
H276/300 276 221 132 .300 .000 CRA
H276/300 276 221 130 .300 .000 CRA
H272/295 272 222 130 .295 .000 CRA
H284/260 284 223 121 .260 .000 DRS
H284/273 284 223 124 .273 .000 DRS
H279/260 279 224 125 .260 .000 DRA
H268/272 268 224 130 .272 .000 DTS
H290/273 290 224 118 .273 .000 CRA
H290/293 290 224 126 .293 .000 CRA
H270/300 270 224 133 .300 .000 CTA
H290/313 290 224 132 .313 .000 CRA
H276/323 276 224 136 .322 .000 CRA
H272/323 272 224 136 .323 .000 CTA
H269/278 269 225 131 .278 .000 DTS
H275/318 275 225 136 .318 .000 CTA
H281/262 281 226 117 .262 .000 CRA
H275/292 275 226 132 .292 .000 CRA
H269/296 269 226 136 .296 .000 DTS
H281/300 281 226 134 .300 .000 CRA
H276/307 276 226 135 .307 .000 CTA
H270/316 270 226 136 .316 .000 CTS
H270/326 270 226 138 .326 .000 CTS
H275/196 275 227 .196 .000 DTS
H272/260 272 228 128 .260 .000 DTS
H276/320 276 228 138 .320 .000 CTA
H277/233 277 229 112 .233 .000 DRS
H272/280 272 230 137 .280 .000 DTS
H272/290 272 230 138 .290 .000 DTS
H273/296 273 230 140 .296 .000 DTS
H285/300 285 230 133 .300 .000 CRA
H286/303 286 230 139 .303 .000 0
H285/308 285 230 138 .308 .000 CRA
H280/310 280 230 140 .310 .000 CTA
H282/323 282 230 140 .323 .000 CRA
H280/327 280 230 141 .327 .000 CTA
H286/328 286 230 139 .328 .000 CRA
H281/305 281 231 140 .305 .000 CTA
H288/323 288 231 143 .323 .000 CRA
H280/262 280 232 120 .262 .000 CRS
H287/262 287 232 120 .262 .000 CRA
H298/278 298 232 126 .278 .000 CRA
H297/280 297 232 129 .280 .000 CRA
H275/300 275 232 141 .300 .000 DTS
H282/316 282 233 142 .316 .000 CTA
H276/330 276 233 143 .330 .000 CTS
H282/338 282 233 145 .338 .000 CTA
H282/277 282 234 136 .277 .000 DTS
H300/325 300 234 141 .325 .000 CRA
H284/335 284 234 144 .335 .000 CTA
H279/225 279 235 110 .225 .000 DTS
H281/234 281 235 122 .234 .000 DTS
H285/305 285 235 142 .305 .000 CTA
H295/308 295 235 141 .308 .000 CRS
H285/316 285 235 145 .316 .000 CTA
H285/322 285 235 146 .322 .000 CTA
H285/324 285 235 146 .324 .000 CTA
H285/338 285 235 145 .338 .000 CTA
H278/262 278 236 135 .262 .000 DTS
H290/264 290 236 123 .264 .000 CRS
H284/290 284 236 138 .290 .000 CTA
H286/300B 286 236 143 .300 .000 CTA
H289/300 289 236 141 .300 .000 CRS
H286/320 286 236 147 .320 .000 CTA
H292/312 292 237 145 .312 .000 CRS
H288/310 288 238 147 .310 .000 CTA
H295/315 295 238 147 .315 .000 CTS
H288/316 288 238 147 .316 .000 CTA
H288/320 288 238 148 .320 .000 CTA
H280/330 280 238 149 .330 .000 CTS
H288/333 288 238 147 .333 .000 CRS
H291/266 291 239 139 .266 .000 DRA
H291/293 291 239 145 .293 .000 DRS
H296/328 296 239 147 .328 .000 CRA
H296/338 296 239 149 .338 .000 CRA
H291/340 291 239 149 .340 .000 CRA
H291/232 291 240 97 .232 .000 CRS
H282/245 282 240 135 .245 .000 DTA
H295/277 295 240 134 .277 .000 CRA
H285/278 285 240 143 .278 .000 DTA
H305/280B 305 240 134 .280 .000 CRA
H286/282B 286 240 147 .282 .000 DTS
H282/292 282 240 149 .292 .000 DTS
H290/296 290 240 146 .296 .000 DRS
H286/297 286 240 149 .297 .000 DTS
H282/300 282 240 149 .300 .000 DTS
H290/300 290 240 147 .300 .000 CTA
H290/312 290 240 147 .312 .000 CRS
H295/320 295 240 148 .320 .000 CRS
H296/330 296 240 147 .330 .000 CRA
H296/333 296 240 150 .333 .000 CRA
H290/340 290 240 152 .340 .000 CTA
H290/347 290 240 152 .347 .000 CTA
H290/316 290 241 150 .316 .000 CTA
H284/245 284 242 137 .245 .000 DTA
H287/251 287 242 142 .251 .000 DTS
H284/260B 284 242 128 .260 .000 CTS
H290/276 290 242 134 .276 .000 CRS
H288/281 288 242 149 .281 .000 DTS
H284/285 284 242 141 .285 .000 CTS
H305/287 305 242 135 .287 .000 CRA
H308/289 308 242 136 .289 .000 CRS
H286/300 286 242 151 .300 .000 DTS
H292/300 292 242 148 .300 .000 CTA
H286/307 286 242 152 .307 .000 DTS
H297/320 297 242 150 .320 .000 CRS
H285/340 285 242 153 .340 .000 CTS
H292/340 292 242 153 .340 .000 CTA
H286/232 286 244 161 .232 .000 DTA
H286/244 286 244 143 .244 .000 DTS
H289/278 289 244 146 .278 .000 DTA
H300/296B 300 244 147 .296 .000 DRA
H288/300 288 244 150 .300 .000 CTA
H299/304 299 244 145 .304 .000 CRS
H300/306 300 244 149 .306 .000 DRA
H300/334 300 244 153 .334 .000 CRA
H287/335 287 244 154 .335 .000 CTS
H301/338 301 244 154 .338 .000 CRA
H298/340 298 244 150 .340 .000 CRA
H302/270 302 245 142 .270 .000 DRA
H300/280 300 245 .280 .000 0
H300/286 300 245 141 .286 .000 CRA
H288/300B 288 245 153 .300 .000 DTA
H295/316 295 245 154 .316 .000 CTA
H299/320 299 245 153 .320 .000 CRA
H295/324 295 245 155 .324 .000 CTA
H295/356 295 245 156 .356 .000 CTA
H290/235 290 246 139 .235 .000 DTA
H292/235 292 246 128 .235 .000 DRS
H288/245 288 246 142 .245 .000 DTA
H291/251 291 246 146 .251 .000 DTS
H294/267 294 246 148 .267 .000 DRS
H302/300 302 246 146 .300 .000 CRS
H301/327 301 246 150 .327 .000 CRS
H301/327B 301 246 152 .327 .000 CRS
H293/261 293 247 146 .261 .000 0
H304/352 304 247 161 .352 .000 CRA
H289/232 289 248 132 .232 .000 DTS
H302/235 302 248 99 .235 .000 CRS
H298/240 298 248 111 .240 .000 CRS
H299/240 299 248 110 .240 .000 CRS
H290/242 290 248 142 .242 .000 DTS
H297/244 297 248 139 .244 .000 DRS
H294/265 294 248 148 .265 .000 DRS
H293/267 293 248 145 .267 .000 DTA
H293/273 293 248 148 .273 .000 DTA
H298/273 298 248 135 .273 .000 CRS
H290/293B 290 248 160 .293 .000 DTS
H304/306 304 248 147 .306 .000 CRS
H291/307 291 248 157 .307 .000 DTS
H303/312 303 248 154 .312 .000 CRS
H301/313 301 248 158 .313 .000 DRS
H303/314 303 248 154 .314 .000 CRS
H304/317 304 248 150 .317 .000 CRS
H304/334 304 248 157 .334 .000 CRA
H301/340 301 249 159 .340 .000 CRA
H292/366 292 249 162 .366 .000 CTS
H297/238 297 250 139 .238 .000 DRS
H292/250 292 250 148 .250 .000 DTS
H291/261 291 250 150 .261 .000 DTS
H290/266 290 250 154 .266 .000 DTS
H290/267 290 250 152 .267 .000 DTS
H305/280 305 250 138 .280 .000 CRS
H324/280 324 250 141 .280 .000 CRA
H332/280 332 250 141 .280 .000 CRA
H303/283 303 250 144 .283 .000 CRS
H305/286 305 250 144 .286 .000 CRA
H298/287 298 250 148 .287 .000 CRS
H299/287 299 250 142 .287 .000 CRS
H299/294 299 250 148 .294 .000 CRS
H299/304B 299 250 152 .304 .000 CRS
H303/310 303 250 155 .310 .000 CRA
H305/314 305 250 156 .314 .000 CRS
H296/315 296 250 160 .315 .000 DTS
H306/315 306 250 152 .315 .000 CRS
H304/320 304 250 157 .320 .000 CRA
H299/333 299 250 161 .333 .000 CRS
H305/350 305 250 159 .350 .000 CRA
H300/360 300 250 161 .360 .000 CTA
H302/251 302 252 147 .251 .000 DRS
H308/285 308 252 144 .285 .000 CRS
H298/290 298 252 159 .290 .000 DTS
H301/300 301 252 158 .300 .000 DRA
H314/301 314 252 146 .301 .000 CRS
H304/305 304 252 155 .305 .000 DRS
H298/307 298 252 161 .307 .000 DTS
H308/317 308 252 156 .317 .000 CRS
H306/320 306 252 159 .320 .000 CRA
H304/251 304 253 148 .251 .000 DTS
H301/267 301 253 154 .267 .000 DRS
H310/338 310 253 163 .338 .000 CRA
H296/373 296 253 166 .373 .000 CTS
H296/234 296 254 147 .234 .000 DTS
H301/234 301 254 138 .234 .000 DRS
H296/250 296 254 152 .250 .000 DTS
H294/266 294 254 157 .266 .000 DTS
H299/270 299 254 151 .270 .000 DTS
H310/275 310 254 140 .275 .000 CRS
H309/277 309 254 142 .277 .000 CRS
H296/293 296 254 166 .293 .000 DTS
H310/296 310 254 150 .296 .000 CRS
H310/306 310 254 152 .306 .000 CRS
H309/314 309 254 160 .314 .000 CRS
H306/327 306 254 163 .327 .000 DRS
H298/344 298 254 166 .344 .000 CTS
H304/350 304 254 166 .350 .000 CRS
H307/241 307 255 140 .241 .000 DRA
H304/244 304 255 137 .244 .000 DRS
H295/253 295 255 153 .253 .000 DTS
H302/257 302 255 152 .257 .000 DRS
H304/262 304 255 152 .262 .000 DRS
H300/267 300 255 152 .267 .000 DTA
H296/280 296 255 162 .280 .000 DTS
H299/281 299 255 161 .281 .000 DTS
H299/282 299 255 162 .282 .000 DTS
H300/296 300 255 160 .296 .000 DTS
H299/300 299 255 163 .300 .000 DTS
H322/300 322 255 147 .300 .000 CRS
H309/320 309 255 161 .320 .000 CRA
H305/360 305 255 167 .360 .000 CTA
H305/365 305 255 166 .365 .000 CTA
H312/365 312 255 166 .365 .000 0
H297/254 297 256 160 .254 .000 DTS
H303/255 303 256 151 .255 .000 DRS
H303/260 303 256 152 .260 .000 DRS
H314/260 314 256 132 .260 .000 CRA
H299/262 299 256 137 .262 .000 CTS
H301/262 301 256 150 .262 .000 DTS
H301/273 301 256 155 .273 .000 DTS
H312/306 312 256 152 .306 .000 CRS
H308/310 308 256 160 .310 .000 CRS
H301/315 301 256 166 .315 .000 DTS
H309/328 309 256 163 .328 .000 CRA
H309/340 309 256 165 .340 .000 CRA
H310/345 310 256 164 .345 .000 CRA
H309/350 309 256 165 .350 .000 CRA
H303/275 303 257 157 .275 .000 DRA
H307/275 307 257 156 .275 .000 DTS
H312/302 312 257 160 .302 .000 DRS
H303/238 303 258 151 .238 .000 DTS
H310/244 310 258 138 .244 .000 DRA
H303/253 303 258 147 .253 .000 DTS
H304/253 304 258 154 .253 .000 DTS
H304/258 304 258 156 .258 .000 DTS
H303/262 303 258 155 .262 .000 DTS
H304/269 304 258 157 .269 .000 DTS
H304/270 304 258 156 .270 .000 DTS
H310/290 310 258 160 .290 .000 DRS
H312/290 312 258 151 .290 .000 CRS
H305/292 305 258 167 .292 .000 DTS
H304/293 304 258 161 .293 .000 DTS
H313/302 313 258 161 .302 .000 DRA
H307/304 307 258 158 .304 .000 CRS
H313/309 313 258 162 .309 .000 DRS
H305/310 305 258 167 .310 .000 DTS
H313/312 313 258 164 .312 .000 DRS
H310/315 310 258 164 .315 .000 DRS
H313/315 313 258 158 .315 .000 CRS
H313/322 313 258 164 .322 .000 DRA
H303/245 303 259 153 .245 .000 DTS
H310/240 310 260 117 .240 .000 CRS
H305/245 305 260 144 .245 .000 DTA
H305/262 305 260 153 .262 .000 DTA
H305/270 305 260 157 .270 .000 DTA
H305/271 305 260 157 .271 .000 DTA
H305/275 305 260 160 .275 .000 DTA
H307/280 307 260 159 .280 .000 DRS
H305/290 305 260 162 .290 .000 DTA
H309/290 309 260 153 .290 .000 CRS
H316/300 316 260 164 .300 .000 DRS
H308/304 308 260 164 .304 .000 DTA
H312/305 312 260 162 .305 .000 DRS
H316/306 316 260 156 .306 .000 CRS
H324/306 324 260 156 .306 .000 CRS
H308/308 308 260 164 .308 .000 DRS
H316/310 316 260 158 .310 .000 CRS
H313/312B 313 260 163 .312 .000 CRA
H325/315 325 260 155 .315 .000 CRS
H313/325 313 260 167 .325 .000 CRA
H313/338 313 260 169 .338 .000 CRA
H313/340 313 260 169 .340 .000 CRS
H313/350 313 260 169 .350 .000 CRA
H307/240 307 262 151 .240 .000 DTS
H309/252 309 262 156 .252 .000 DRS
H307/255 307 262 158 .255 .000 DTS
H308/258 308 262 160 .258 .000 DTS
H307/260 307 262 160 .260 .000 DTS
H304/267 304 262 160 .267 .000 DTS
H307/273 307 262 164 .273 .000 DTS
H312/276 312 262 145 .276 .000 CRS
H310/294 310 262 158 .294 .000 CRS
H307/316 307 262 171 .316 .000 DTS
H315/330 315 262 169 .330 .000 CRA
H315/350 315 262 171 .350 .000 CRA
H308/220 308 263 114 .220 .000 DTS
H308/232 308 263 129 .232 .000 DTA
H311/262 311 263 156 .262 .000 DRS
H321/262 321 263 156 .262 .000 DRA
H311/265 311 263 161 .265 .000 DRA
H311/272 311 263 164 .272 .000 DTA
H315/283 315 263 165 .283 .000 DRS
H315/286 315 263 154 .286 .000 CRS
H315/290 315 263 165 .290 .000 DRS
H315/293 315 263 158 .293 .000 CRS
H318/310 318 263 167 .310 .000 DRA
H308/313 308 263 171 .313 .000 DTA
H320/319 320 263 168 .319 .000 DRS
H315/322 315 263 170 .322 .000 DRS
H318/330 318 263 169 .330 .000 DRS
H320/370 320 263 176 .370 .000 0
H308/265 308 264 162 .265 .000 DTS
H314/265 314 264 141 .265 .000 CRA
H308/268 308 264 164 .268 .000 DTS
H322/273 322 264 146 .273 .000 CRA
H309/275 309 264 163 .275 .000 DTA
H318/290 318 264 155 .290 .000 CRS
H324/296 324 264 167 .296 .000 DRA
H312/297 312 264 172 .297 .000 DTS
H324/306B 324 264 169 .306 .000 DRA
H320/310 320 264 228 .310 .000 CRS
H309/315 309 264 171 .315 .000 DTS
H311/260 31 265 165 .260 .000 DTS
H312/273 312 265 165 .273 .000 DRS
H314/274 314 265 162 .274 .000 DRS
H321/281 321 265 150 .281 .000 CRS
H318/330B 293 265 172 .330 .000 CRA
H317/365 317 265 175 .365 .000 CRS
H311/258 311 266 158 .258 .000 DTA
H313/270B 313 266 163 .270 .000 DTA
H313/272 313 266 166 .272 .000 DRS
H313/278 313 266 165 .278 .000 DRS
H313/287 313 266 170 .287 .000 DRS
H316/287 316 266 156 .287 .000 CRS
H312/293 312 266 169 .293 .000 DTS
H315/294 315 266 157 .294 .000 CRS
H315/304 315 266 163 .304 .000 CRS
H323/319 323 266 171 .319 .000 DRS
H319/267 319 267 161 .267 .000 DRA
H311/268 311 267 167 .268 .000 DTS
H324/294 324 267 168 .294 .000 DRS
H314/325 314 267 177 .325 .000 DTS
H313/230 313 268 132 .230 .000 DTA
H313/260 313 268 160 .260 .000 DTA
H320/268 320 268 131 .268 .000 CRS
H313/270 313 268 164 .270 .000 DTA
H313/271 313 268 160 .271 .000 DRA
H313/275 313 268 166 .275 .000 DTS
H320/280 320 268 168 .280 .000 DRA
H312/282 312 268 172 .282 .000 DTS
H324/283 324 268 152 .283 .000 CRS
H320/290 320 268 156 .290 .000 CRS
H313/294 313 268 171 .294 .000 DRA
H317/300 317 268 173 .300 .000 DTA
H322/302 322 268 159 .302 .000 0
H313/306 313 268 174 .306 .000 DTS
H323/307 323 268 170 .307 .000 DRS
H323/314 323 268 165 .314 .000 CRS
H333/315 333 268 158 .315 .000 CRS
H320/353 320 268 175 .353 .000 CRS
H316/360 316 268 178 .360 .000 CRA
H313/245 313 269 163 .245 .000 DTS
H312/275 312 269 169 .275 .000 DTS
H325/300 325 269 173 .300 .000 DRS
H331/301 331 269 159 .301 .000 CRS
H315/270B 315 270 166 .270 .000 DTA
H319/272 319 270 169 .272 .000 DTA
H319/276 319 270 168 .276 .000 DRA
H315/278 315 270 173 .278 .000 DTS
H315/282 315 270 171 .282 .000 DTA
H339/300 339 270 157 .300 .000 CRS
H318/308 318 270 173 .308 .000 DRS
H325/314 325 270 167 .314 .000 CRS
H323/330 323 270 175 .330 .000 CRA
H320/275 320 271 168 .275 .000 DRS
H318/287 318 271 174 .287 .000 DRS
H315/260 315 272 170 .260 .000 DTA
H315/262 315 272 171 .262 .000 DTA
H316/265 316 272 170 .265 .000 DTS
H316/268 316 272 171 .268 .000 DTS
H315/270 315 272 175 .270 .000 DTA
H316/270 316 272 172 .270 .000 DTS
H316/278 316 272 175 .278 .000 DTS
H328/290 328 272 159 .290 .000 CRS
H317/294 317 272 166 .294 .000 CTS
H317/305 317 272 181 .305 .000 DTS
H317/316 317 272 181 .316 .000 DTS
H319/230 319 274 138 .230 .000 DTS
H326/230 326 274 155 .230 .000 DRS
H319/243 319 274 150 .243 .000 DTA
H319/303 309 274 179 .303 .000 DTA
H322/365 322 274 184 .365 .000 CRA
H317/273 317 275 175 .273 .000 DTA
H322/275 322 275 175 .275 .000 DRS
H328/297 328 275 161 .297 .000 CRS
H322/327 322 275 185 .327 .000 DTS
H321/240 321 276 149 .240 .000 DTA
H320/270 320 276 172 .270 .000 DTA
H327/278 327 276 143 .278 .000 CRS
H321/280 321 276 170 .280 .000 DRA
H321/284 327 276 177 .284 .000 DTA
H321/294 321 276 179 .294 .000 DRA
H321/300 321 276 181 .300 .000 CRS
H326/307 326 277 182 .307 .000 DRA
H319/273 319 278 179 .273 .000 DTA
H319/280 319 278 182 .280 .000 DTA
H325/355 325 280 184 .355 .000 CTS
H327/284 327 282 178 .284 .000 DTA
H327/300 327 282 187 .300 .000 CRS
HF266/310 266 218 129 .310 .000 CTA
HF277/315 277 223 137 .315 .000 CTA
HF285/330 285 240 152 .330 .000 CTS
HF295/338 295 242 153 .338 .000 CRS
HF296/338 296 242 153 .338 .000 CRS
HF299/355 299 245 157 .355 .000 CRA
HF296/330 296 246 158 .330 .000 CRS
HF297/350 297 246 160 .350 .000 CRS
HF298/340 298 248 162 .340 .000 CTS
HF303/347 303 248 159 .347 .000 CRS
HF291/330 291 250 164 .330 .000 DTS
HF305/347 305 250 161 .347 .000 CRS
HF291/355 291 250 166 .355 .000 CTS
HF294/377 294 250 167 .377 .000 CTS
HF290/365 290 252 186 .365 .000 CTS
HF309/347 309 254 165 .347 .000 CRS
HF309/365 309 254 165 .365 .000 CRS
HF309/345 309 256 169 .345 .000 CRA
HF311/347 311 256 167 .347 .000 CRS
HF312/360 312 257 168 .360 .000 CRS
HF314/325 314 258 168 .325 .000 DRS
HF313/343 313 260 172 .313 .000 CRS
HF315/350 315 260 170 .350 .000 CRS
HF304/395 304 260 177 .395 .000 CTS
HF308/297 308 263 175 .297 .000 DTS
HF308/303 308 263 176 .303 .000 DTS
HF318/360 318 263 173 .360 .000 CRA
HF310/312 310 264 175 .312 .000 DRS
HF322/325 322 266 176 .325 .000 DRS
HF323/335 323 266 174 .335 .000 DRS
HF321/343 321 268 179 .313 .000 CRS
HF314/318 314 268 179 .318 .000 DRS
HF331/335 331 274 182 .335 .000 DRS
HF325/345 325 278 191 .345 .000 DTS
HC239/270 239 189 102 .270 .000 CRA
HC254/288 254 206 120 .288 .000 CTA
HC260/296 260 212 126 .296 .000 CTA
HC267/320 267 214 131 .320 .000 CTA
HC268/326 268 220 136 .326 .000 CTA
HC273/330 273 220 137 .330 .000 CTA
HC272/336 272 224 140 .336 .000 CTA
HC270/335 270 226 142 .335 .000 CTS
HC281/325 281 228 144 .325 .000 CTA
HC275/333 275 230 148 .333 .000 CTS
HC276/340 276 231 147 .340 .000 CTS
HC275/350 275 231 149 .350 .000 CRS
HC276/334 276 232 147 .334 .000 CTS
HC282/335 282 234 149 .335 .000 CRS
HC284/340 284 234 148 .340 .000 CRS
HC278/360 278 234 152 .360 .000 CRS
HC285/322 285 236 151 .322 .000 CTA
HC285/325 285 236 152 .325 .000 CTA
HC283/350 283 236 153 .350 .000 CRS
HC287/350 287 237 153 .350 .000 CRS
HC284/335 284 238 152 .335 .000 CRS
HC282/360 282 238 156 .360 .000 CRS
HC287/360 287 240 157 .360 .000 CRS
HC283/320 283 242 159 .320 .000 DTS
HC292/325 292 243 158 .325 .000 CTA
HC294/350 294 244 159 .350 .000 CRS
HC294/360 294 244 159 .360 .000 CRS
HC288/365 288 244 161 .365 .000 CTS
HC287/323 287 246 163 .323 .000 DTS
HC290/340 290 246 162 .340 .000 CTS
HC292/355 292 248 166 .355 .000 CRS
HC307/360 307 250 164 .360 .000 CRA
HC303/353 303 252 166 .353 .000 CRS
HC302/360 302 252 167 .360 .000 CRS
HC298/375 298 253 170 .375 .000 CRS
HC315/360 315 258 172 .360 .000 CRA
HC310/350 310 260 174 .350 .000 CRS
HC309/305 309 264 180 .305 .000 DTS
HC317/312 317 272 188 .312 .000 DTS
http://www.bulletcams.com/Masters/Mastlist.txt
(662)893-8022 Bob
CAMSHAFTS:
STREET/STRIP 100 COMPETTITON 150
ADD: $15 FOR P55 CORE $50 FOR REAR DRIVE
ROLLER CAMS:
SM. CHEVY 275 BB. CHEVY 295 ALL OTHERS 310
1) The easiest way is to add the intake opening times to the exhaust closing time. Seat to seat times (advertised duration) must be used. .050" durations or timings will not give the correct overlap.
Example:
Comp Cams EX268H
Adv dur: int 268º, exh 280º
110 LSA, 106 ILC (4º advance)
Valve timing @ .006"
intake opens @ 28º BTDC
Intake closes @ 60º ABDC
Exhaust opens @ 76º BBDC
Exhaust closes @ 26º ATDC
In this example the overlap is 54º (28º+26º)
2) If the seat to seat opening and closing times are not known, the overlap can be calculated using the advertised duration and the Lobe Separation Angle (LSA). This formula works for both single and dual pattern cams.
Add the intake and exhaust adv durations
Divide the results by 4
Subtract the LSA
Multiply the results by 2
Using the example cam above:
268+280=548
548/4=137
137-110=27
27*2=54
The overlap is 54º
