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 12612273
2007 L92 6.2L CAM AT NOMINAL TIMING:
115.5 LDA 116 INTAKE CENTERLINE ‘NOMINAL’
(99 AT PHASER PARK)
1.70 ROCKER RATIO |
| Lift: | | | |
| | @Cam | @Valve | |
| | EXHAUST: 0.294 | 0.500 | |
| | INTAKE: 0.294 | 0.500 | |
| Cam Timing@0.004-inch Tappet Lift: |
| | Open | Close | Adv. Duration |
| | EXHAUST: 69 BBDC | 35 ATDC | 284 |
| | INTAKE: 8 BTDC | 90 ABDC | 278 |
| Cam Timing@0.050-inch Tappet Lift: |
| | Open | Close | Duration |
| | EXHAUST: 38 BBDC | 9 BTDC | 209 |
| | INTAKE: 18 ATDC | 36 ABDC | 198 |
PART NUMBER 12561721
116 LDA 115 INTAKE CENTERLINE.
PRODUCTION 2001 6.0L TRUCK AND 5.7L
LS1 CAR CAMSHAFT.
1.7 ROCKER RATIO |
| Lift: | | | |
| | @Cam | @Valve | |
| | EXHAUST: 0.281 | 0.475 | |
| | INTAKE: 0.274 | 0.463 | |
| Cam Timing@0.004-inch Tappet Lift: |
| | Open | Close | Adv. Duration |
| | EXHAUST: 71 BBDC | 33 ATDC | 284 |
| | INTAKE: 11 BTDC | 87 ABDC | 278 |
| Cam Timing@0.050-inch Tappet Lift: |
| | Open | Close | Duration |
| | EXHAUST: 39 BBDC | 12 BTDC | 207 |
| | INTAKE: 17 ATDC | 33 ABDC | 196 |
PART NUMBERS 12560950,12593206
2001 LS6 AND LS2 CAM DATA
116 LDA AND 118 INTAKE TIMING.
1.70 ROCKER RATIO |
| Lift: |
| @Cam | @Valve | |
| EXHAUST: 0.308 | 0.524 | |
| INTAKE: 0.308 | 0.524 | |
| Cam Timing@0.004-inch Tappet Lift: |
| Open | Close | Adv. Duration |
| | EXHAUST: 65 BBDC | 30 ATDC | 275 |
| | INTAKE: 9 BTDC | 81 ABDC | 270 |
| Cam Timing@0.050-inch Tappet Lift: |
| | Open | Close | Duration |
| | EXHAUST: 37 BBDC | 6 BTDC | 211 |
| | INTAKE: 18 ATDC | 42 ABDC | 204 |
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