If you are looking for camshaft specifications for the V6 here they are:
Standard Camshaft Timings for the early VN Series 1 V6 Engine:
Advertised Valve Timing at height - 0.006 inches
Inlet Opens - 22.4 degrees BTDC
Inlet Closes - 66.9 degrees ABDC
Exhaust Opens - 70.7 degrees BBDC
Exhaust Closes - 26.2 degrees ATDC
Inlet Valve Duration - 269.3 degrees
Exhaust Valve Duration - 276.9 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4376 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4373 inches
Inlet Valve Lift at TDC - 0.0336 inches
0.050 Valve Timing
Inlet Opens - minus 15.3 degrees BTDC (15.3 degrees ATDC)
Inlet Closes - 29.2 degrees ABDC
Exhaust Opens - 30.4 degrees BBDC
Exhaust Closes - minus 14.2 degrees ATDC (14.2 degrees BTDC)
Inlet Valve Duration - 193.9 degrees
Exhaust Valve Duration - 196.2 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4376 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4373 inches
Ramp Rate - 2.13
Valve Overlap Seat to Seat - 48.6 degrees
Valve Overlap at 0.050 inches - minus 29.5 degrees
Inlet Lobe Centreline - 112.2 degrees
Exhaust Lobe Centreline - 112.3 degrees
Lobe Separation Angle - 112.3 degrees
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Standard Cam Timings for the late VN-VP-VR-early VS Series Two V6 Engine:
Advertised Valve Timing at height - 0.008 inches
Inlet Opens - 9.8 degrees BTDC
Inlet Closes - 52.1 degrees ABDC
Exhaust Opens - 56.8 degrees BBDC
Exhaust Closes - 14.5 degrees ATDC
Inlet Valve Duration - 241.9 degrees
Exhaust Valve Duration - 251.3 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4066 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4083 inches
Inlet Valve Lift at TDC - 0.0256 inches
0.050 Valve Timing
Inlet Opens - minus 20.9 degrees BTDC (20.9 degrees ATDC)
Inlet Closes - 21.4 degrees ABDC
Exhaust Opens - 26.1 degrees BBDC
Exhaust Closes - minus 16.2 degrees ATDC (16.2 degrees BTDC)
Inlet Valve Duration - 180.5 degrees
Exhaust Valve Duration - 189.9 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4066 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4083 inches
Ramp Rate - 2.27
Valve Overlap Seat to Seat - 24.3 degrees
Valve Overlap at 0.050 inches - minus 37.1 degrees
Inlet Lobe Centreline - 111.1 degrees
Exhaust Lobe Centreline - 111.2 degrees
Lobe Separation Angle - 111.2 degrees
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Standard Valve Timing for the LateVS-VT-VX-VY EcoTech V6 Engine:
Advertised Valve Lift at height - 0.006 inches
Inlet Opens - 6.7 degrees BTDC
Inlet Closes - 57.0 degrees ABDC
Exhaust Opens - 65.3 degrees BBDC
Exhaust Closes - 15.1 degrees ATDC
Inlet Valve Duration - 243.7 degrees
Exhaust Valve Duration - 260.4 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4099 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4112 inches
Inlet Valve Lift at TDC - 0.0208 inches
0.050 Valve Timing
Inlet Opens - minus 24.4 degrees BTDC (24.4 degrees ATDC)
Inlet Closes - 25.8 degrees ABDC
Exhaust Opens - 31.6 degrees BBDC
Exhaust Closes - minus 18.7 degrees ATDC (18.7 degrees BTDC)
Inlet Valve Duration - 181.4 degrees
Exhaust Valve Duration - 192.9 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4099 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4112 inches
Ramp Rate - 2.22
Valve Overlap Seat to Seat - 21.8 degres
Valve Overlap at 0.050 inches - minus 43.1 degrees
Inlet Lobe Centreline - 115.2 degrees
Exhaust Lobe Centreline - 115.1 degrees
Lobe Separation Angle - 115.1 degrees
I hope all of these cam timings are of help to you all and they will be invaluable when comparing an aftermarket camshaft to the standard one that Holden used originally in these engines.
Standard Camshaft Timings for the early VN Series 1 V6 Engine:
Advertised Valve Timing at height - 0.006 inches
Inlet Opens - 22.4 degrees BTDC
Inlet Closes - 66.9 degrees ABDC
Exhaust Opens - 70.7 degrees BBDC
Exhaust Closes - 26.2 degrees ATDC
Inlet Valve Duration - 269.3 degrees
Exhaust Valve Duration - 276.9 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4376 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4373 inches
Inlet Valve Lift at TDC - 0.0336 inches
0.050 Valve Timing
Inlet Opens - minus 15.3 degrees BTDC (15.3 degrees ATDC)
Inlet Closes - 29.2 degrees ABDC
Exhaust Opens - 30.4 degrees BBDC
Exhaust Closes - minus 14.2 degrees ATDC (14.2 degrees BTDC)
Inlet Valve Duration - 193.9 degrees
Exhaust Valve Duration - 196.2 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4376 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4373 inches
Ramp Rate - 2.13
Valve Overlap Seat to Seat - 48.6 degrees
Valve Overlap at 0.050 inches - minus 29.5 degrees
Inlet Lobe Centreline - 112.2 degrees
Exhaust Lobe Centreline - 112.3 degrees
Lobe Separation Angle - 112.3 degrees
--------------------------------------------------------------------------
Standard Cam Timings for the late VN-VP-VR-early VS Series Two V6 Engine:
Advertised Valve Timing at height - 0.008 inches
Inlet Opens - 9.8 degrees BTDC
Inlet Closes - 52.1 degrees ABDC
Exhaust Opens - 56.8 degrees BBDC
Exhaust Closes - 14.5 degrees ATDC
Inlet Valve Duration - 241.9 degrees
Exhaust Valve Duration - 251.3 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4066 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4083 inches
Inlet Valve Lift at TDC - 0.0256 inches
0.050 Valve Timing
Inlet Opens - minus 20.9 degrees BTDC (20.9 degrees ATDC)
Inlet Closes - 21.4 degrees ABDC
Exhaust Opens - 26.1 degrees BBDC
Exhaust Closes - minus 16.2 degrees ATDC (16.2 degrees BTDC)
Inlet Valve Duration - 180.5 degrees
Exhaust Valve Duration - 189.9 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4066 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4083 inches
Ramp Rate - 2.27
Valve Overlap Seat to Seat - 24.3 degrees
Valve Overlap at 0.050 inches - minus 37.1 degrees
Inlet Lobe Centreline - 111.1 degrees
Exhaust Lobe Centreline - 111.2 degrees
Lobe Separation Angle - 111.2 degrees
--------------------------------------------------------------------------
Standard Valve Timing for the LateVS-VT-VX-VY EcoTech V6 Engine:
Advertised Valve Lift at height - 0.006 inches
Inlet Opens - 6.7 degrees BTDC
Inlet Closes - 57.0 degrees ABDC
Exhaust Opens - 65.3 degrees BBDC
Exhaust Closes - 15.1 degrees ATDC
Inlet Valve Duration - 243.7 degrees
Exhaust Valve Duration - 260.4 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4099 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4112 inches
Inlet Valve Lift at TDC - 0.0208 inches
0.050 Valve Timing
Inlet Opens - minus 24.4 degrees BTDC (24.4 degrees ATDC)
Inlet Closes - 25.8 degrees ABDC
Exhaust Opens - 31.6 degrees BBDC
Exhaust Closes - minus 18.7 degrees ATDC (18.7 degrees BTDC)
Inlet Valve Duration - 181.4 degrees
Exhaust Valve Duration - 192.9 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4099 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4112 inches
Ramp Rate - 2.22
Valve Overlap Seat to Seat - 21.8 degres
Valve Overlap at 0.050 inches - minus 43.1 degrees
Inlet Lobe Centreline - 115.2 degrees
Exhaust Lobe Centreline - 115.1 degrees
Lobe Separation Angle - 115.1 degrees
I hope all of these cam timings are of help to you all and they will be invaluable when comparing an aftermarket camshaft to the standard one that Holden used originally in these engines.
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