L77 DOD Camshaft specs

[monstar]

Wouldn't the 10kw gain be going from hydraulic power steering to electric?

Well that’s not included in engine power rating, it’s the different cam.

 

[pzessd]

But wouldnt the engine power rating include having any accessories hanging off? i.e power steering pump?

 

[monstar]

But wouldnt the engine power rating include having any accessories hanging off? i.e power steering pump?

Depends, for power steering doesnt matter if the power source is directly from engine, derivative or external, for the test must be just a fully operational pump. It must be set for minimum parasitic loss at rated speed. Neither pump draw power from the engine on a power run on a rolling road (straight line).

 

[John Revill]

Same as L76.

Basically 200/208 0.478" 116.5 LSA

But there is more to it in the detail with seperate deac specs.

The cam lobe has less lift on the DOD enabled cylinders because of the lifter mechanism.

Lobe lift — models without Active Fuel Management (AFM)
Intake
6.0 litre (LS2, L98) 7.78 mm
6.2 litre (LS3) 8.24 mm
Exhaust
6.0 litre (LS2, L98) 7.77 mm
6.2 litre (LS3) 7.77 mm

Lobe lift — 6.0 litre (L76, L77) with Active Fuel Management (AFM)
Intake
Cylinders 2, 3, 5, 8 7.08 mm
Cylinders 1, 4, 6, 7 7.20 mm
Exhaust
Cylinders 2, 3, 5, 8 7.17 mm
Cylinders 1, 4, 6, 7 7.30 mm

 

[monstar]

The cam lobe has less lift on the DOD enabled cylinders because of the lifter mechanism.

Lobe lift — models without Active Fuel Management (AFM)
Intake
6.0 litre (LS2, L98) 7.78 mm
6.2 litre (LS3) 8.24 mm
Exhaust
6.0 litre (LS2, L98) 7.77 mm
6.2 litre (LS3) 7.77 mm

Lobe lift — 6.0 litre (L76, L77) with Active Fuel Management (AFM)
Intake
Cylinders 2, 3, 5, 8 7.08 mm
Cylinders 1, 4, 6, 7 7.20 mm
Exhaust
Cylinders 2, 3, 5, 8 7.17 mm
Cylinders 1, 4, 6, 7 7.30 mm

Haha, where did you get that lot from?

 

[monstar]

@John Revill a bit of a giggle, never seen figures presented like that, converted to metric then rounded off.
Basically there’s several cams for each engine code, no two engines share cams, the data for deac / normal AFM cylinders is juxtaposed, and you can’t generalise by engine capacity.
Having said that, the thread is about L77 for which there is so much misinformation and confusion hence the OP. So I had this cam measured on an audie graph and found the intake and exhaust lobes on cylinder one (deac) both 0.300” at peak. Cylinder two (normal) is same as ‘05-‘06 LS2.

 

[John Revill]

Haha, where did you get that lot from?

The Haynes VE/VF/WM/WN technical Service Manual

 

[monstar]

The Haynes VE/VF/WM/WN technical Service Manual

Thanks, you’d think the publisher would do better than that, downright misleading and dangerous.