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
LS9 12605227 CAM CARD INFORMATION:
122 INTAKE CENTERLINE, 122.5 LOBE
DISPLACEMENT ANGLE
1.70 ROCKER RATIO |
| Valve Lift: |
| | @Cam | @Valve | |
| | EXHAUST: 0.328 | 0.558 = 14.2 mm | |
| | INTAKE: 0.331 | 0.562 = 14.3 mm | |
| Cam Timing@0.004-inch Tappet Lift: |
| | Open | Close | Adv. Duration |
| | EXHAUST: 84 BBDC | 31 ATDC | 295 |
| | INTAKE: 8 BTDC | 89 ABDC | 277 |
| Cam Timing@0.050-inch Tappet Lift: |
| | Open | Close | Duration |
| | EXHAUST: 56 BBDC | 6 BTDC | 230 |
| | INTAKE: 18 ATDC | 49 ABDC | 211 |
PART NUMBER 12603844
LS3 CAM CARD DATA:
120 INTAKE CENTERLINE, 117.5 LOBE DISPLACEMENT ANGLE *LDA*
1.70 ROCKER RATIO |
| Valve Lift: | | | |
| | @Cam | @Valve | |
| | Exhaust: 0.306 | 0.522 = 13.3 mm | |
| | Intake: 0.324 | 0.551 = 14.0 mm | |
| Cam Timing@0.004-inch Tappet Lift: |
| | Open | Close | Adv. Duration |
| | Exhaust: 66 BBDC | 29 ATDC | 275 |
| | Intake: 7 BTDC | 80 ABDC | 267 |
| Cam Timing@0.050-inch Tappet Lift: |
| | Open | Close | Duration |
| | Exhaust: 38 BBDC | 7 BTDC | 211 |
| | Intake: 19 ATDC | 43 ABDC | 204 |
PART NUMBER 12480033
LS SERIES HOT CAM
109 INTAKE CENTERLINE 112 LDA
1.71 INTAKE ROCKER RATIO |
| Lift: |
| | @Cam | @Valve | |
| | EXHAUST: 0.308 | 0.525 | |
| | INTAKE : 0.308 | 0.525 | |
| Cam Timing@0.004-inch Tappet Lift: |
| | Open | Close | Adv. Duration |
| | EXHAUST: 75 BBDC | 32 ATDC | 287 |
| | INTAKE : 27 BTDC | 71 ABDC | 278 |
| Cam Timing@0.050-inch Tappet Lift: |
| | Open | Close | Duration |
| | EXHAUST: 46 BBDC | 0 ATDC | 226 |
| | INTAKE : 1 ATDC | 39 ABDC | 218 |
Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!