Cam id
From the Comp Cams catalog. It's strange that there isn't an LSA scribed into the cam as well.
XTREME ENERGY™ XE-R FOR LS1 The XE-R designs are our most aggressive hydraulic roller ramps to date. They are quicker off and on the seat than the original Xtreme Energy™ Series, yet they are still stable with rigid valve train and optimized spring selection. These profiles provide even more area than the comparable Small Block Chevrolet designs that are often used by other companies to “grow” a more aggressive lobe for LS-1 applications.
LOBE RATED DURATION IN DEGREES LOBE LIFT TAPPET LIFT @ TDC THEORETICAL VALVE LIFT @ NUMBER DURATION ”0” Lash ROCKER ARM RATIO CAMSHAFT TYPE
@ .050 @ .200 106° 110° 1.5 1.6 1.7 XE-R for LS1
3720 269 220 143 0.342 .062 .049 .513 .547 .581
3721 271 222 144 0.342 .065 .052 .513 .547 .581
3722 273 224 146 0.342 .069 .055 .513 .547 .581
3723 275 223 147 0.344 .073 .059 .516 .550 .585
3724 277 228 149 0.346 .076 .062 .519 .554 .588
3725 279 230 151 0.348 .080 .065 .522 .557 .592
3726 281 232 153 0.350 .083 .069 .525 .560 .595
3727 283 234 155 0.352 .087 .072 .528 .563 .598
3728 285 236 157 0.354 .091 .076 .531 .566 .602
3729 287 238 159 0.356 .095 .079 .534 .570 .605
3730 289 240 161 0.358 .099 .083 .537 .573 .609
3731 291 242 163 0.359 .102 .087 .539 .574 .610
3732 293 244 165 0.360 .106 .091 .540 .576 .612
3733 295 246 167 0.361 .110 .095 .542 .578 .614
3734 297 248 169 0.362 .114 .098 .543 .579 .615
XTREME ENERGY™ XE-R FOR LS1 The XE-R designs are our most aggressive hydraulic roller ramps to date. They are quicker off and on the seat than the original Xtreme Energy™ Series, yet they are still stable with rigid valve train and optimized spring selection. These profiles provide even more area than the comparable Small Block Chevrolet designs that are often used by other companies to “grow” a more aggressive lobe for LS-1 applications.
LOBE RATED DURATION IN DEGREES LOBE LIFT TAPPET LIFT @ TDC THEORETICAL VALVE LIFT @ NUMBER DURATION ”0” Lash ROCKER ARM RATIO CAMSHAFT TYPE
@ .050 @ .200 106° 110° 1.5 1.6 1.7 XE-R for LS1
3720 269 220 143 0.342 .062 .049 .513 .547 .581
3721 271 222 144 0.342 .065 .052 .513 .547 .581
3722 273 224 146 0.342 .069 .055 .513 .547 .581
3723 275 223 147 0.344 .073 .059 .516 .550 .585
3724 277 228 149 0.346 .076 .062 .519 .554 .588
3725 279 230 151 0.348 .080 .065 .522 .557 .592
3726 281 232 153 0.350 .083 .069 .525 .560 .595
3727 283 234 155 0.352 .087 .072 .528 .563 .598
3728 285 236 157 0.354 .091 .076 .531 .566 .602
3729 287 238 159 0.356 .095 .079 .534 .570 .605
3730 289 240 161 0.358 .099 .083 .537 .573 .609
3731 291 242 163 0.359 .102 .087 .539 .574 .610
3732 293 244 165 0.360 .106 .091 .540 .576 .612
3733 295 246 167 0.361 .110 .095 .542 .578 .614
3734 297 248 169 0.362 .114 .098 .543 .579 .615
