If you are chasing any head flow specifications, please have a look here:
Head Flow Data as supplied by greenfoam
Stock VN/P Buick V6 head flow
28 inches of water
Intake
Lift Flow
0.100 51 cfm
0.200 109 cfm
0.300 147 cfm
0.400 156 cfm
0.500 162 cfm
Exhaust
Lift Flow
0.100 45 cfm
0.200 95 cfm
0.300 123 cfm
0.400 133 cfm
0.500 138 cfm
EcoTech V6 head flow
28 inches of water
Intake
Lift Flow
0.100 54 cfm
0.200 114.3 cfm
0.300 155.7 cfm
0.400 177.5 cfm
0.500 184.3 cfm
0.550 186.3 cfm
0.600 188.9 cfm
Exhaust
Lift Flow
0.100 45.3 cfm
0.200 98.2 cfm
0.300 132.1 cfm
0.400 145.5 cfm
0.500 148.1 cfm
0.550 151.6 cfm
0.600 152.6 cfm
Head Flow Data as supplied by beardy91
These port flow figures are straight from Kosteki Engine Centre here in WA. They are Stock EcoTech V6 heads with a 3 angle competition valve job with standard valves:
Intake tested at 28" H2O and corrected to 2.0" H2O - valve diameter = 1.786 inches, stem diameter = 0.342 inches, port area = 1.79 square inches.
Exhaust tested at 28" H2O and corrected to 10.0" H2O - valve diameter = 1.508 inches, stem diameter = 0.342 inches, port area = 1.42 square inches.
Intake
Lift Flow
0.050 8.7 cfm
0.075 12.0 cfm
0.100 16.9 cfm
0.150 25.1 cfm
0.175 29.5 cfm
0.200 32.8 cfm
0.250 38.9 cfm
0.275 41.0 cfm
0.300 42.9 cfm
0.350 46.0 cfm
0.400 48.3 cfm
0.450 49.6 cfm
0.500 50.0 cfm
Exhaust
Lift Flow
0.050 12.0 cfm
0.075 20.4 cfm
0.100 29.4 cfm
0.150 50.5 cfm
0.175 57.5 cfm
0.200 63.4 cfm
0.250 76.2 cfm
0.275 81.7 cfm
0.300 85.0 cfm
0.350 88.5 cfm
0.400 90.2 cfm
0.450 92.2 cfm
0.500 93.0 cfm
I hope that all these figures help you and if you use the Desktop Dyno 2003 with ProTools Engine Simulation Software or the Desktop Dyno 2000 Engine Simulation Software with the above figures in the AirFlow section along with the other figures shown in the thread "Desktop Dyno 2003 Engine Simulation Software" you will get your horsepower and torque readings for your engine combination. By making changes to your engine on the simulator you can see what the difference will be before buying any parts.
Head Flow Data as supplied by greenfoam
Stock VN/P Buick V6 head flow
28 inches of water
Intake
Lift Flow
0.100 51 cfm
0.200 109 cfm
0.300 147 cfm
0.400 156 cfm
0.500 162 cfm
Exhaust
Lift Flow
0.100 45 cfm
0.200 95 cfm
0.300 123 cfm
0.400 133 cfm
0.500 138 cfm
EcoTech V6 head flow
28 inches of water
Intake
Lift Flow
0.100 54 cfm
0.200 114.3 cfm
0.300 155.7 cfm
0.400 177.5 cfm
0.500 184.3 cfm
0.550 186.3 cfm
0.600 188.9 cfm
Exhaust
Lift Flow
0.100 45.3 cfm
0.200 98.2 cfm
0.300 132.1 cfm
0.400 145.5 cfm
0.500 148.1 cfm
0.550 151.6 cfm
0.600 152.6 cfm
Head Flow Data as supplied by beardy91
These port flow figures are straight from Kosteki Engine Centre here in WA. They are Stock EcoTech V6 heads with a 3 angle competition valve job with standard valves:
Intake tested at 28" H2O and corrected to 2.0" H2O - valve diameter = 1.786 inches, stem diameter = 0.342 inches, port area = 1.79 square inches.
Exhaust tested at 28" H2O and corrected to 10.0" H2O - valve diameter = 1.508 inches, stem diameter = 0.342 inches, port area = 1.42 square inches.
Intake
Lift Flow
0.050 8.7 cfm
0.075 12.0 cfm
0.100 16.9 cfm
0.150 25.1 cfm
0.175 29.5 cfm
0.200 32.8 cfm
0.250 38.9 cfm
0.275 41.0 cfm
0.300 42.9 cfm
0.350 46.0 cfm
0.400 48.3 cfm
0.450 49.6 cfm
0.500 50.0 cfm
Exhaust
Lift Flow
0.050 12.0 cfm
0.075 20.4 cfm
0.100 29.4 cfm
0.150 50.5 cfm
0.175 57.5 cfm
0.200 63.4 cfm
0.250 76.2 cfm
0.275 81.7 cfm
0.300 85.0 cfm
0.350 88.5 cfm
0.400 90.2 cfm
0.450 92.2 cfm
0.500 93.0 cfm
I hope that all these figures help you and if you use the Desktop Dyno 2003 with ProTools Engine Simulation Software or the Desktop Dyno 2000 Engine Simulation Software with the above figures in the AirFlow section along with the other figures shown in the thread "Desktop Dyno 2003 Engine Simulation Software" you will get your horsepower and torque readings for your engine combination. By making changes to your engine on the simulator you can see what the difference will be before buying any parts.