CAM LOBE PROFILE CATALOG - Crane Cams Australia

MECHANICAL ROLLER PROFILES
PROFILE CODE
DUR. AT .050”/
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG. IN.
DUR. AT
.200”
TAPPET LIFT
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
Continued on next page.
cranecams.com | 866.388.5120
DESIGN
LOBE SIZE
CODE
1.50 1.60 1.70 1.76 SEE PAGE 3
5401 Continued from previous page.
R-310/5401 340 .0200 231 .256 .207 .810 .864 .918 .950 F G
R-310/5601 341 .0200 228 .251 .201 .840 .896 .952 .986 G
R-310/600 340 .0200 233 .266 .213 .900 .960 1.020 1.056 G
R-312/615 342 .0200 236 .274 .220 .923 .984 1.046 1.082 G
R-314/530 344 .0200 235 .262 .216 .795 .848 .901 .933 E
R-314/5401 345 .0200 233 .259 .212 .810 .864 .918 .950 E
R-314/550 344 .0200 235 .266 .218 .825 .880 .935 .968 G
R-314/560 345 .0200 234 .262 .213 .840 .896 .952 .986 E
R-314/5601 345 .0200 232 .261 .211 .840 .896 .952 .986 G
R-314/580 345 .0200 234 .265 .215 .870 .928 .986 1.021 G
R-314/600 344 .0200 237 .277 .224 .900 .960 1.020 1.056 G
R-316/515 347 .0200 234 .258 .213 .773 .824 .876 .906 F
R-316/550 346 .0200 237 .271 .222 .825 .880 .935 .968 F
R-316/580 347 .0200 237 .271 .222 .870 .928 .986 1.021 G
R-318/580 348 .0200 241 .282 .232 .870 .928 .986 1.021 G
R-320/5401 351 .0200 240 .272 .225 .810 .864 .918 .950 F
R-324/5401 354 .0200 244 .284 .238 .810 .864 .918 .950 F G
555
555 roller series for engines with large cam journal diameters. This series provides
very good high speed stability. Will run to 10,000+ RPM with properly set up valve train.
Proven excellent performer. Recommended lash is .020" intake and .022" exhaust.
R-266/540 296 .0200 192 .156 .118 .810 .864 .918 .950 E
R-270/500 302 .0200 193 .158 .121 .750 .800 .851 .880 C E
R-270/5402 302 .0200 195 .162 .125 .810 .864 .918 .951 G
R-272/5003 304 .0200 194 .162 .126 .750 .800 .851 .880 F
R-274/5601 304 .0200 201 .177 .137 .840 .896 .952 .986 G
R-274/5602 304 .0200 201 .178 .136 .840 .896 .952 .986 G
R-276/5402 308 .0200 200 .175 .137 .810 .864 .918 .951 G
R-276/555 306 .0200 202 .181 .141 .833 .888 .944 .977 G
R-276/5601 306 .0200 203 .181 .142 .840 .896 .952 .986 G
R-278/5251 310 .0200 201 .177 .140 .788 .840 .893 .924 E
R-278/555 302 .0200 204 .185 .145 .833 .888 .944 .977 G
R-278/600 308 .0200 207 .192 .149 .900 .960 1.020 1.056 G
R-280/5202 313 .0200 202 .180 .142 .780 .832 .884 .915 G
R-280/555 312 .0200 204 .182 .148 .833 .888 .944 .977 G
R-280/6401 309 .0200 212 .205 .159 .960 1.024 1.088 1.127 H
R-282/5003 314 .0200 202 .181 .145 .750 .800 .851 .880 F
R-282/5402 314 .0200 205 .188 .149 .810 .864 .918 .951 G
R-282/555 314 .0200 206 .188 .152 .833 .888 .944 .977 G
R-282/565 313 .0200 207 .191 .156 .848 .904 .961 .994 G
R-284/5203 316 .0200 205 .188 .151 .780 .832 .884 .915 E
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