CAM LOBE PROFILE CATALOG - Crane Cams Australia

MECHANICAL FLAT TAPPET 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
MECHANICAL FLAT TAPPET PROFILES
FC18 Continued from previous page.
114 DEG.
EXHAUST
GROSS VALVE LIFT WITH ZERO LASH AT
THEORETICAL ROCKER RATIO SHOWN
Continued on next page.
cranecams.com | 866.388.5120
MINIMUM
TAPPET
DIAMETER
1.50 1.60 1.70 1.76 SEE PAGE 2
F-254/330 286 .0200 158 .117 .084 .594 .842
F-262/340 294 .0200 166 .131 .097 .612 .842
F4
F4 mechanical series created for NASCAR ® racing applications. This series has an excellent
racing history. Designed to make full use of .875” diameter tappets. Recommended lash is .018”.
F-262/3851 298 .0200 174 .137 .101 .578 .616 .655 .678 .875
F-264/388 300 .0200 176 .141 .105 .582 .621 .660 .683 .875
F-266/391 302 .0200 178 .144 .108 .587 .626 .665 .688 .875
F-268/394 304 .0200 180 .149 .112 .591 .630 .670 .693 .875
F-270/397 306 .0200 182 .152 .115 .596 .635 .675 .699 .875
F-272/400 308 .0200 184 .156 .118 .600 .640 .680 .704 .875
F-274/403 310 .0200 186 .159 .122 .605 .645 .685 .709 .875
F-276/406 312 .0200 188 .163 .126 .609 .650 .690 .715 .875
F-278/409 314 .0200 190 .167 .130 .614 .654 .695 .720 .875
F-280/4125 316 .0200 192 .171 .133 .619 .660 .701 .726 .875
F-284/4125 320 .0200 196 .179 .141 .619 .660 .701 .726 .875
F-286/4125 322 .0200 198 .182 .144 .619 .660 .701 .726 .875
F5
F5 mechanical series created for NASCAR ® racing applications.
Designed to make full use of .875” diameter tappets. Recommended lash is .018”.
F-246/370 278 .0200 158 .109 .076 .555 .592 .629 .651 .875
F-250/376 282 .0200 162 .116 .082 .564 .602 .639 .662 .875
F-254/382 286 .0200 166 .123 .088 .573 .611 .649 .672 .875
F-258/388 290 .0200 170 .130 .095 .582 .621 .660 .683 .875
F-260/391 292 .0200 172 .134 .098 .587 .626 .665 .688 .875
F-262/394 294 .0200 174 .137 .102 .591 .630 .670 .693 .875
F-264/397 296 .0200 176 .141 .105 .596 .635 .675 .699 .875
F-266/400 298 .0200 178 .145 .109 .600 .640 .680 .704 .875
F-268/403 300 .0200 180 .148 .112 .605 .645 .685 .709 .875
F-270/406 302 .0200 182 .152 .116 .609 .650 .690 .715 .875
F-272/409 304 .0200 184 .156 .119 .614 .654 .695 .720 .875
F-274/412 306 .0200 186 .159 .123 .618 .659 .700 .725 .875
F-276/415 308 .0200 188 .163 .126 .623 .664 .706 .730 .875
F-278/4181 310 .0200 190 .167 .130 .627 .669 .711 .736 .875
F-280/421 312 .0200 192 .170 .134 .632 .674 .716 .741 .875
F-286/430 318 .0200 198 .181 .145 .645 .688 .731 .757 .875
TLF2
TLF2 mechanical series created for NASCAR ® racing applications.
Designed to make full use of .875” diameter tappets. Recommended lash is .012”.
F-258/3642 294 .0160 170 .133 .094 .546 .583 .619 .641 .875
F-260/3821 296 .0160 172 .136 .098 .573 .611 .650 .672 .875
1.8
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