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.
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DESIGN
LOBE SIZE
CODE
1.50 1.60 1.70 1.76 SEE PAGE 3
SR
SR Street Roller series created for late model engines running mechanical rollers requiring
quiet valve train operation, due to monitoring by knock sensors. Recommended lash is .020".
SR-212/314 262 .0150 123 .055 .034 .471 .502 .534 .553 B
SR-220/326 270 .0150 132 .066 .041 .489 .522 .554 .574 B
SR-228/338 278 .0150 140 .077 .050 .507 .541 .575 .595 B
SR-236/350 286 .0150 149 .090 .060 .525 .560 .595 .616 B
SR-240/356 290 .0150 153 .097 .065 .534 .570 .605 .627 B
SR-244/362 294 .0150 157 .104 .071 .543 .579 .615 .637 B
SR-248/368 298 .0150 162 .111 .078 .552 .589 .626 .648 B
SR-250/374 300 .0150 164 .115 .081 .561 .598 .636 .658 B
SR-252/374 302 .0150 166 .118 .084 .561 .598 .636 .658 B
SR-254/374 304 .0150 168 .122 .087 .561 .598 .636 .658 B
SR-256/374 306 .0150 169 .126 .090 .561 .598 .636 .658 B
SR-260/374 310 .0150 172 .133 .097 .561 .598 .636 .658 B
SR-262/374 312 .0150 174 .136 .100 .561 .598 .636 .658 B
SR-264/374 314 .0150 176 .140 .104 .561 .598 .636 .658 B
SR-268/374 318 .0150 179 .147 .111 .561 .598 .636 .658 B
SR-270/374 320 .0150 182 .150 .114 .561 .598 .636 .658 B
SR-274/374 324 .0150 185 .157 .121 .561 .598 .636 .658 B
SR400
SR400 Street Roller .400" lift series for mechanical rollers in serious street and marine
performance applications. Recommended lash is .020" intake and .022" exhaust.
SR-236/400 274 .0200 157 .089 .060 .600 .640 .680 .704 B
SR-240/400 278 .0200 159 .096 .066 .600 .640 .680 .704 B
SR-244/400 282 .0200 163 .103 .070 .600 .640 .680 .704 B
SR-248/400 286 .0200 167 .111 .076 .600 .640 .680 .704 B
SR-252/400 290 .0200 170 .119 .082 .600 .640 .680 .704 B
SR-256/400 294 .0200 174 .127 .089 .600 .640 .680 .704 B
SR-258/400 296 .0200 176 .131 .093 .600 .640 .680 .704 B
SR-260/400 298 .0200 178 .135 .097 .600 .640 .680 .704 B
SR-264/400 302 .0200 182 .143 .104 .600 .640 .680 .704 B
CDS
CDS Cam Dynamics roller series created for oval track and endurance racing applications.
Gentle valve motion with a proven history. Recommended lash is .030".
R-250/395 287 .0200 164 .112 .079 .593 .632 .672 .467 B
R-252/395 289 .0200 167 .117 .082 .593 .632 .672 .467 C
R-255/395 292 .0200 169 .121 .087 .593 .632 .672 .467 B
R-257/395 294 .0200 172 .126 .090 .593 .632 .672 .467 C
R-260/395 297 .0200 173 .132 .094 .593 .632 .672 .467 B
R-265/395 302 .0200 178 .140 .103 .593 .632 .672 .467 B
R-270/400 307 .0200 181 .148 .112 .600 .640 .680 .704 B
R-275/3987 315 .0200 182 .152 .116 .598 .638 .678 .702 B
R-280/400 320 .0200 188 .161 .125 .600 .640 .680 .704 B
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