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
TAPPET LIFT AT
TOP DEAD CENTER
104 DEG.
INTAKE
114 DEG.
EXHAUST
GROSS VALVE LIFT WITH ZERO LASH AT
THEORETICAL ROCKER RATIO SHOWN
cranecams.com | 866.388.5120
DESIGN
LOBE SIZE
CODE
1.50 1.60 1.70 1.80 SEE PAGE 3
ENGINE OR APPLICATION SPECIFIC MECHANICAL ROLLER PROFILES
HC Continued from previous page.
R-260/3903 287 .0200 181 .141 .110 .585 .624 .664 .703 D
R-262/347 293 .0200 171 .132 .106 .521 .555 .590 .625 D
R-262/365 295 .0200 170 .129 .095 .548 .584 .621 .657 C
R-262/385 290 .0200 176 .140 .103 .578 .616 .655 .693 C
R-262/3901 295 .0200 172 .129 .095 .585 .624 .663 .702 C
R-264/365 297 .0200 172 .133 .099 .548 .584 .621 .657 C
R-264/3651 294 .0200 177 .143 .107 .548 .584 .621 .657 B D
R-264/378 295 .0200 177 .138 .108 .567 .605 .643 .680 C
R-264/3783 291 .0200 182 .147 .117 .567 .605 .643 .681 D
R-264/390 296 .0200 176 .135 .100 .585 .624 .663 .702 C
R-266/365 300 .0200 170 .134 .101 .548 .584 .621 .657 G
R-266/3651 296 .0200 178 .147 .110 .548 .584 .621 .657 F
R-266/366 297 .0200 177 .139 .112 .549 .586 .622 .659 D
R-266/390 298 .0200 178 .139 .103 .585 .624 .663 .702 C
R-266/417 295 .0200 188 .151 .120 .626 .667 .709 .751 C
R-268/365 302 .0200 173 .136 .103 .548 .584 .621 .657 C G
R-268/366 299 .0200 179 .143 .116 .549 .586 .622 .659 D
R-268/390 300 .0200 179 .143 .107 .585 .624 .663 .702 C
R-270/390 303 .0200 179 .143 .108 .585 .624 .663 .702 C
R-272/385 300 .0200 185 .157 .120 .578 .616 .655 .693 C
R-272/390 305 .0200 181 .147 .111 .585 .624 .663 .702 C
R-274/390 307 .0200 182 .151 .115 .585 .624 .663 .702 C
R-274/417 304 .0200 192 .161 .131 .626 .667 .709 .751 C
R-278/390 311 .0200 186 .159 .121 .585 .624 .663 .702 C
R-280/3901 313 .0200 188 .162 .125 .585 .624 .663 .702 C
R-286/390 319 .0200 194 .173 .136 .585 .624 .663 .702 C
RLDP
Chevrolet LS V8, RLDP mechanical roller series, stable lobes used in endurance
racing applications. Recommended lash is .020" intake and .022" exhaust.
R-242/353 273 .0200 157 .097 .074 .600 .635 F
R-248/353 279 .0200 162 .108 .083 .600 .635 F
R-254/353 286 .0200 165 .122 .087 .600 .635 F
R-260/353 292 .0200 169 .131 .096 .600 .635 F
RLS
Chevrolet LS1 V8, RLS mechanical roller series, used in high speed performance
applications. Recommended lash is .020" intake and .022" exhaust.
R-232/382 263 .0200 156 .091 .059 .649 .688 F
R-240/3821 269 .0200 161 .102 .068 .649 .688 F
R-244/382 273 .0200 164 .110 .074 .649 .688 F
R-248/382 277 .0200 167 .117 .081 .649 .688 F
R-252/382 281 .0200 171 .125 .088 .649 .688 F
R-260/382 289 .0200 177 .140 .102 .649 .688 F
R-276/382 302 .0200 190 .168 .130 .649 .688 F
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