LSR Rectangular Port 235/251 Hydraulic Roller Cam for GM LS GEN III/IV
HYDRAULIC ROLLER-Very strong from mid-range to high end torque and horsepower for LS engines with rectangular port cylinder heads.
54-470-11
Specifications
Engine Family: GM LS GEN III/IV 3-Bolt 8 Cylinder (1997-2015)
RPM Operating Range: 2,200-7,200
Grind Number: 285LRR HR-13
Cam Type: Hydraulic Roller
Lifter Style: Hydraulic Roller
Camshaft Series: LSR Rectangular Port All Out Power
Advertised Intake Duration: 285
Advertised Exhaust Duration: 301
Intake Duration at .050 Inch Lift: 235
Exhaust Duration at .050 Inch Lift: 251
Intake Valve Lift: 0.621
Exhaust Valve Lift: 0.624
Lobe Lift Intake: 0.365
Lobe Lift Exhaust: 0.367
Lobe Separation: 113
Intake Centreline: 109
Exhaust Close ATDC: 34
Intake Open BTDC: 32
Exhaust Open BBDC: 86
Intake Close ABDC: 72
Camshaft Gear Attachment: 3-Bolt