LS9 Cam only

Yaj Yak

Gladys
TCG Premium
May 24, 2007
122,894
89,630
Niche score of 2,363
Given the similarity in specs, it is not surprising that the power curve offered by the LS9 mimicked that of the LS7 with 1.7 rockers. The LS7 offered slightly more peak power, but only slightly. We did not run the LS9 with 1.8 rockers, as the LS9 was factory-equipped with 1.7 LS3-based rockers. Equipped with the LS9 cam, the 5.3L produced 420 hp and 393 lb-ft of torque. Note that peak torque production never varied by more than 15 lb-ft with any of the factory cams; the duration simply shifted the torque curve higher or lower in the rev range. Whereas the LM7 produced peak torque at just 4,300 rpm, the LS7 and LS9 cams produced peak torque 700–800 rpm higher.

Engine Designation: LS9

Displacement 6.2L
Lift 0.558/0.562
Duration 211/230 degrees
LSA 122.5 degrees
Idle vacuum 20.1 in-Hg
Cranking Compression 163 psi
Peak Power 420 at 6,200 rpm
Peak Torque 393 at 5,100 rpm
Average HP 303
Average TQ 360
HP/TQ Gains (Over LM7 cam) at 2,500 -41 lb-ft
3,500 -20 lb-ft
4,500 -2 lb-ft
5,500 +51 lb-ft (53 hp)
6,500


Read more: LS Cam Test Comparison - Car Craft Magazine



:wackit:
 

Mike@Devo2ning

Mike Da Mechanic
Jan 26, 2012
378
2
IL
Given the similarity in specs, it is not surprising that the power curve offered by the LS9 mimicked that of the LS7 with 1.7 rockers. The LS7 offered slightly more peak power, but only slightly. We did not run the LS9 with 1.8 rockers, as the LS9 was factory-equipped with 1.7 LS3-based rockers. Equipped with the LS9 cam, the 5.3L produced 420 hp and 393 lb-ft of torque. Note that peak torque production never varied by more than 15 lb-ft with any of the factory cams; the duration simply shifted the torque curve higher or lower in the rev range. Whereas the LM7 produced peak torque at just 4,300 rpm, the LS7 and LS9 cams produced peak torque 700–800 rpm higher.

Engine Designation: LS9

Displacement 6.2L
Lift 0.558/0.562
Duration 211/230 degrees
LSA 122.5 degrees
Idle vacuum 20.1 in-Hg
Cranking Compression 163 psi
Peak Power 420 at 6,200 rpm
Peak Torque 393 at 5,100 rpm
Average HP 303
Average TQ 360
HP/TQ Gains (Over LM7 cam) at 2,500 -41 lb-ft
3,500 -20 lb-ft
4,500 -2 lb-ft
5,500 +51 lb-ft (53 hp)
6,500


Read more: LS Cam Test Comparison - Car Craft Magazine



:wackit:

Thanks for the info [MENTION=19]Kay Jay[/MENTION]. Though it was never dyno'd with the LS9 cam we know it did make good power with some boost thrown at it too. :smile:
 

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