CAM LOBE PROFILE CATALOG - Crane Cams Australia

PROFILE CODE
DUR. AT .050”/
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG. IN.
30 cranecams.com | 866.388.5120
DUR. AT
.200”
TAPPET LIFT
MECHANICAL ROLLER PROFILES
MECHANICAL ROLLER PROFILES
TAPPET LIFT AT
TOP DEAD CENTER
104 DEG.
INTAKE
114 DEG.
EXHAUST
GROSS VALVE LIFT WITH ZERO LASH AT
THEORETICAL ROCKER RATIO SHOWN
DESIGN
LOBE SIZE
CODE
1.50 1.60 1.70 1.76 SEE PAGE 3
4467 Continued from previous page.
R-264/4467 296 .0202 187 .152 .112 .670 .715 .759 .786 B C F G
R-266/4467 298 .0202 189 .156 .115 .670 .715 .759 .786 B C F G
R-268/4467 300 .0202 191 .161 .120 .670 .715 .759 .786 B C F
R-270/4467 302 .0202 193 .165 .124 .670 .715 .759 .786 B C
R-272/4467 304 .0202 195 .170 .128 .670 .715 .759 .786 B F
R-274/4467 306 .0202 197 .174 .132 .670 .715 .759 .786 F
R-276/4467 308 .0202 198 .178 .136 .670 .715 .759 .786 B C
R-278/4467 310 .0202 200 .183 .140 .670 .715 .759 .786 B
R-280/4467 312 .0202 202 .187 .144 .670 .715 .759 .786 B C
R-282/4467 314 .0202 204 .191 .149 .670 .715 .759 .786 B
R-284/4467 316 .0202 206 .195 .153 .670 .715 .759 .786 B
R-288/4467 320 .0202 210 .203 .161 .670 .715 .759 .786 B
R-292/4467 324 .0202 214 .212 .170 .670 .715 .759 .786 B
4541
4541 roller, stable high RPM series (when ground on 55 mm jourmal, or larger, core)
created for oval track and drag racing that gives a .726”+ net valve lift when used with a
1.6:1 or greater rocker ratio. Recommended lash is .020" intake and .022" exhaust.
R-262/4541 293 .0200 182 .136 .108 .681 .727 .772 .799 F G
R-264/4541 295 .0200 184 .140 .111 .681 .727 .772 .799 C G
R-264/4542 297 .0200 183 .140 .108 .681 .727 .772 .799 F
R-264/4543 296 .0200 184 .146 .107 .681 .727 .772 .800 B
R-266/4541 297 .0200 185 .143 .115 .681 .727 .772 .799 B F
R-268/4541 299 .0200 187 .147 .118 .681 .727 .772 .799 B
R-270/4542 303 .0200 188 .151 .118 .681 .727 .772 .799 F
R-272/4542 303 .0200 190 .158 .124 .681 .727 .772 .799 C
R-274/4541 305 .0200 196 .172 .128 .681 .727 .772 .799 B C
R-278/4541 309 .0200 199 .181 .136 .681 .727 .772 .799 B
R-282/4541 313 .0200 203 .189 .145 .681 .727 .772 .799 B
R-284/4541 315 .0200 205 .193 .149 .681 .727 .772 .799 B
R-294/4541 328 .0200 205 .188 .159 .681 .727 .772 .799 C
R-304/4541 339 .0200 212 .203 .174 .681 .727 .772 .799 C
471
471 roller series created for sprint car and drag racing applications that give .750"+ lift with 1.6
or greater rocker ratios. Also, large CID bracket racing engines and high torque Engine Masters
Challenge type of applications. Recommended lash is .020" intake and .022" exhaust.
R-252/471 284 .0200 177 .122 .090 .707 .754 .801 .829 C
R-256/471 288 .0200 180 .130 .098 .707 .754 .801 .829 C
R-260/471 292 .0200 183 .138 .105 .707 .754 .801 .829 B
R-264/471 296 .0200 186 .145 .112 .707 .754 .801 .829 B
R-268/471 300 .0200 188 .150 .117 .707 .754 .801 .829 G
R-274/471 306 .0200 193 .161 .127 .707 .754 .801 .829 G
R-280/471 312 .0200 198 .173 .138 .707 .754 .801 .829 C E G
Continued on next page.