CAM LOBE PROFILE CATALOG - Crane Cams Australia

PROFILE CODE
DUR. AT .050”/
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG. IN.
24 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
CDS Continued from previous page.
R-285/4194 325 .0200 194 .172 .134 .629 .671 .713 .738 B
R-290/4200 330 .0200 200 .178 .143 .630 .672 .714 .739 B
TR
TR Track Roller series created for oval track and endurance racing applications with a proven
history. A benchmark from which other cams are measured. Recommended lash is .022".
TR-242/3867 282 .0195 158 .094 .071 .580 .619 .657 .681 B
TR-250/400 290 .0195 166 .110 .082 .600 .640 .680 .704 B
TR-252/4036 286 .0200 171 .117 .089 .605 .646 .686 .710 C
TR-256/4167 296 .0195 171 .123 .093 .625 .667 .708 .733 B
TR-260/4167 300 .0195 175 .129 .099 .625 .667 .708 .733 B
TR-260/4200 294 .0200 179 .134 .104 .630 .672 .714 .739 B
TR-262/4036 296 .0200 181 .137 .107 .605 .646 .686 .710 C
TR-266/4167 306 .0195 181 .141 .108 .625 .667 .708 .733 B
TR-270/4167 310 .0195 185 .152 .116 .625 .667 .708 .733 B
TR-270/4200 304 .0020 189 .155 .120 .630 .672 .714 .739 B
TR-274/410 314 .0195 186 .156 .117 .615 .656 .697 .722 C
TR-276/4167 316 .0195 191 .162 .126 .625 .667 .708 .733 B
TR-276/4200 310 .0200 195 .170 .132 .630 .672 .714 .739 B
TR-280/4167 320 .0195 194 .166 .134 .625 .667 .708 .733 B
TR-282/4200 316 .0200 200 .183 .144 .630 .672 .714 .739 B
TR-286/4167 326 .0195 200 .179 .142 .625 .667 .708 .733 B
395
395 Roller series created for oval track and endurance racing applications
with 55 mm journals, usually with 1.6, and up to 2.0, rocker arm ratios. Easy on
valve springs. Recommended lash is .020" intake and .022" exhaust.
R-252/3951 284 .0200 169 .117 .088 .593 .632 .672 .695 F
R-256/395 288 .0200 173 .125 .094 .593 .632 .672 .695 F
R-262/395 296 .0200 174 .129 .100 .593 .632 .672 .695 F
R-264/395 298 .0200 175 .132 .103 .593 .632 .672 .695 F
R-268/395 302 .0200 178 .138 .109 .593 .632 .672 .695 F
400
400 roller series created for oval track and endurance racing applications with 2.036" journals,
usually with 1.6 or higher rocker arm ratios. Recommended lash is .020" intake and .022" exhaust.
R-240/400 272 .0200 159 .092 .072 .600 .640 .680 .704 D
R-244/400 276 .0200 163 .099 .078 .600 .640 .680 .704 D
R-248/400 280 .0200 166 .107 .084 .600 .640 .680 .704 D
R-252/400 284 .0200 170 .138 .109 .600 .640 .680 .704 D
405
405 roller series created for oval track and endurance racing applications with 55 mm journals,
usually with 1.6 or higher rocker arm ratios. Recommended lash is .020" intake and .022" exhaust.
R-258/4051 290 .0200 177 .131 .099 .608 .648 .689 .713 E G
R-264/4051 296 .0200 182 .142 .112 .608 .648 .689 .713 E
R-266/405 298 .0200 184 .148 .116 .608 .648 .689 .713 E