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SOLID ROLLER<br />
42<br />
SOLID ROLLER<br />
CR SERIES ROLLERS<br />
The CR Series profiles are excellent for high rpm, high rocker ratio applications where good valve train components<br />
can be used. The smaller profiles work well in restricted applications where extended life is required and the<br />
larger profiles are excellent in high rpm open applications.<br />
CAMSHAFT TYPE<br />
CR Series<br />
Rated Duration @<br />
.020” Tappet Lift<br />
LOBE RATED DURATION IN LOBE TAPPET LIFT @ THEORETICAL VALVE LIFT<br />
NUMBER DURATION DEGREES LIFT TDC @ “0” LASH ROCKER ARM RATIO<br />
@ .050” @ .200” 106° 110° 1.7 1.75 1.8<br />
4345 CR281 250 168 .395 .111 .096 .672 .691 .711<br />
4346 CR283 252 170 .395 .115 .100 .672 .691 .711<br />
4347 CR285 254 172 .395 .119 .104 .672 .691 .711<br />
4348 CR287 256 174 .395 .123 .107 .672 .691 .711<br />
4349 CR289 258 176 .395 .127 .111 .672 .691 .711<br />
4382 CR291 260 178 .395 .131 .115 .672 .691 .711<br />
4383 CR293 262 179 .395 .135 .119 .672 .691 .711<br />
4384 CR295 264 181 .395 .139 .123 .672 .691 .711<br />
4385 CR297 266 183 .395 .143 .127 .672 .691 .711<br />
4386 CR299 268 185 .395 .147 .131 .672 .691 .711<br />
2486 299 268 186 .420 .147 .131 .714 .735 .756<br />
4387 CR301 270 186 .395 .150 .134 .672 .691 .711<br />
4388 CR303 272 188 .395 .154 .138 .672 .691 .711<br />
2488 303 272 190 .420 .156 .139 .714 .735 .756<br />
4389 CR305 274 190 .395 .158 .142 .672 .691 .711<br />
4390 CR307 276 192 .395 .161 .146 .672 .691 .711<br />
2490 307 276 194 .420 .164 .147 .714 .735 .756<br />
4391 CR309 278 193 .395 .165 .149 .672 .691 .711<br />
4682 CR311 280 195 .395 .169 .153 .672 .691 .711<br />
2492 311 280 198 .420 .172 .155 .714 .735 .756<br />
4683 CR313 282 197 .395 .172 .157 .672 .691 .711<br />
4684 CR315 284 199 .395 .176 .161 .672 .691 .711<br />
2494 315 284 201 .420 .180 .163 .714 .735 .756<br />
4685 CR317 286 200 .395 .180 .165 .672 .691 .711<br />
4686 CR319 288 202 .395 .183 .168 .672 .691 .711<br />
4687 CR321 290 204 .395 .187 .172 .672 .691 .711<br />
CR LIFT RULE ROLLERS<br />
These low lift designs are based on the CR Series rollers and are specifically designed for lift rule application, such<br />
as Hooters Cup. Typically they will be used with either 1.65:1 or 1.7:1 rocker ratios but would be stable with up<br />
to 1.8:1 ratios.<br />
CAMSHAFT TYPE<br />
CR Lift Rule .367"<br />
Rated Duration @<br />
.020” Tappet Lift<br />
CR Lift Rule .378"<br />
Rated Duration @<br />
.020” Tappet Lift<br />
LOBE RATED DURATION IN LOBE TAPPET LIFT @ THEORETICAL VALVE LIFT<br />
NUMBER DURATION DEGREES LIFT TDC @ “0” LASH ROCKER ARM RATIO<br />
@ .050” @ .200” 106° 110° 1.6 1.65 1.7<br />
4427 279 248 165 .367 .107 .092 .587 .606 .624<br />
4428 283 252 168 .367 .115 .100 .587 .606 .624<br />
4429 287 256 172 .367 .123 .107 .587 .606 .624<br />
4430 291 260 175 .367 .130 .115 .587 .606 .624<br />
4431 295 264 179 .367 .138 .122 .587 .606 .624<br />
4432 299 268 182 .367 .146 .130 .587 .606 .624<br />
4433 303 272 186 .367 .153 .137 .587 .606 .624<br />
4436 275 244 161 .367 .100 .085 .587 .606 .624<br />
4438 307 276 189 .367 .159 .145 .587 .606 .624<br />
4445 283 252 168 .378 .115 .100 .605 .624 .643<br />
4447 287 256 172 .378 .123 .107 .605 .624 .643<br />
4449 291 260 175 .378 .131 .115 .605 .624 .643<br />
4451 295 264 179 .378 .138 .123 .605 .624 .643<br />
1 . 8 0 0 . 9 9 9 . 0 8 5 3
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