Vortec GM head Small Block Chevy   Pocket Porting Job only
1.94 Intake & 1.5 Exhaust

Lift=Valve lift while testing      Previous CFM=original flow
CurrentCFM=flow after porting      % Gain=flow improvement in percent
Exhaust/Intake=Relationship between intake & exhaust flow    Flowed @ 28 in.
Intake Port Test Results
Lift               Previous CFM        Current CFM                 % Gain       Exhaust/Intake

0.050 37.6 37.6 0.0 73.2
0.100 68.1 70.2 3.1 76.0
0.200 136.1 139.1 2.2 76.2
0.300 193.1 193.1 0.0 72.3
0.400 222.8 227.3 2.0 67.1
0.450 228.8 234.7 2.6 69.5
.0500 228.8 234.7 2.6 72.2
0.550 225.8 231.7 2.6 74.6

Exhaust Port Test Results
Lift               Previous CFM        Current CFM                 % Gain       Exhaust/Intake

0.050 26.3 27.5 4.6 73.2
0.100 51.8 53.4 3.1 76.0
0.200 105.9 105.9 0.0 76.2
0.300 134.8 139.6 3.6 72.3
0.400 144.4 152.5 5.6 67.1
0.450 146.8 163.2 11.1 69.5
0.500 147.6 169.6 14.9 72.2
0.550 149.2 172.8 15.8 74.6

Work done.  Pocket Port Job, flow test, Valve Job, set up springs.     $529.00     4/01

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