CAM LOBE PROFILE CATALOG - Crane Cams Australia

PROFILE CODE
DUR. AT .050”/
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG. IN.
42 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
555 Continued from previous page.
R-284/525 316 .0200 206 .189 .152 .788 .840 .893 .924 G
R-284/555 316 .0200 208 .194 .155 .833 .888 .944 .977 E
R-288/5202 320 .0200 208 .196 .158 .780 .832 .884 .915 E
R-290/520 322 .0200 209 .200 .162 .780 .832 .884 .915 E
R-292/5001 326 .0200 208 .197 .161 .750 .800 .851 .880 G
R-292/525 326 .0200 211 .202 .164 .788 .840 .893 .924 G
R-294/5003 328 .0200 210 .201 .165 .750 .800 .851 .880 H
R-296/5001 330 .0200 212 .205 .168 .750 .800 .851 .880 E
R-296/5252 330 .0200 214 .210 .172 .788 .840 .893 .924 G
R-296/540 330 .0200 215 .213 .174 .810 .864 .918 .950 E
R-298/500 332 .0200 213 .208 .172 .750 .800 .851 .880 H
R-298/550 332 .0200 218 .219 .179 .825 .880 .935 .968 G
R-300/510 334 .0200 216 .214 .177 .756 .816 .867 .898 G
R-304/5502 338 .0200 222 .231 .191 .825 .880 .953 .968 G
R-306/5201 340 .0200 221 .227 .189 .780 .832 .884 .915 E
R-310/5302 342 .0200 225 .236 .198 .795 .848 .901 .933 E
R-310/5551 345 .0200 226 .247 .197 .833 .888 .944 .977 G
R-314/640 346 .0200 238 .277 .231 .960 1.024 1.088 1.126 H
PROFILE CODE
DUR. AT .050”/
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG. IN.
DUR. AT
.200”
TAPPET LIFT
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 1.80 SEE PAGE 3
ENGINE OR APPLICATION SPECIFIC MECHANICAL ROLLER PROFILES
HC
Originally designed for Hooters Cup type .625” lift rule, HC roller series. Also used in
other applications without lift rule. Recommended lash is .020" intake and .022" exhaust.
R-252/390 283 .0200 166 .116 .083 .585 .625 .624 .663 C
R-254/347 285 .0200 165 .118 .093 .521 .555 .555 .590 D
R-254/365 287 .0200 162 .115 .083 .548 .584 .584 .621 C
R-256/366 286 .0200 171 .124 .098 .549 .586 .586 .622 D
R-256/3661 286 .0200 171 .121 .101 .549 .586 .586 .622 D
R-256/390 287 .0200 170 .124 .089 .585 .625 .624 .663 C
R-258/347 289 .0200 168 .125 .099 .521 .555 .555 .590 B D
R-258/3471 286 .0200 170 .126 .102 .521 .555 .555 .590 B
R-258/3472 286 .0200 170 .126 .102 .521 .556 .556 .590 B
R-258/365 291 .0200 166 .121 .089 .548 .584 .584 .621 C G
R-258/3651 288 .0200 172 .133 .096 .548 .584 .584 .621 F
R-258/390 289 .0200 172 .127 .092 .585 .625 .624 .663 C
R-260/3901 292 .0200 172 .128 .094 .585 .625 .624 .663 C
Continued on next page.