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LS Engine Performance - LS Power For Less

GM Engineers Tell Super Chevy How To Build The Best Budget LS Combos With Factory Parts.

Photography by GM Corp, Jim McCraw
PART NUMBER 12565308
PRODUCTION 2002 LS6 5.7L CAMSHAFT.
117.5 LDA 120 INTAKE CENTERLINE.
1.70 ROCKER RATIO
Lift:
  @Cam @Valve  
  EXHAUST: 0.322 0.548  
  INTAKE: 0.324 0.551  
Cam Timing@0.004-inch Tappet Lift:
Open   Close Adv. Duration
  EXHAUST: 69 BBDC 33 ATDC 282
  INTAKE: 7 BTDC 80 ABDC 267
Cam Timing@0.050-inch Tappet Lift:
Open   Close Duration
  EXHAUST: 42 BBDC 4 BTDC 218
  INTAKE: 19 ATDC 43 ABDC 204
LS7:
1.8 ROCKER RATIO
120 INTAKE CENTERLINE, 120.5 LOBE
DISPLACEMENT ANGLE
Lift:
  @Cam @Valve  
  EXHAUST: 0.328 0.588  
  INTAKE: 0.331 0.593  
Cam Timing@0.004-inch Tappet Lift:
  Open Close Adv. Duration
  EXHAUST: 80 BBDC 35 ATDC 295
  INTAKE: 8 BTDC 89 ABDC 277
Cam Timing@0.050-inch Tappet Lift:
  Open Close Duration
  EXHAUST: 52 BBDC 2 BTDC 230
  INTAKE: 18 ATDC 49 ABDC 211
LSA 12605220 CAM CARD INFORMATION:
119 INTAKE CENTERLINE, 119 LOBE DISPLACEMENT ANGLE
1.70 ROCKER RATIO
Lift:
  @Cam @Valve  
  EXHAUST: 0.283 0.480 = 12.2 mm  
  INTAKE: 0.283 0.480 = 12.2 mm  
Cam Timing@0.004-inch Tappet Lift:
  Open Close Adv. Duration
  EXHAUST: 79 BBDC 34 ATDC 293
  INTAKE: 5 BTDC 86 ABDC 271
Cam Timing@0.050-inch Tappet Lift:
  Open Close Duration
  EXHAUST: 46 BBDC 10 BTDC 216
  INTAKE: 21 ATDC 39 ABDC 198
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