462 Chevy Head  NASCAR Street Stock   No porting allowed, Flowcut valve seats only
1.94 Intake & 1.6 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 34.0 36.9 8.3 72.4
0.100 68.8 70.3 2.2 80.4
0.200 124.1 125.6 1.2 81.8
0.300 169.4 178.3 5.3 73.8
0.400 205.0 208.0 1.4 71.0
0.450 212.4 216.9 2.1 74.5
0.500 213.9 219.9 2.8 75.7
0.550 216.9 221.3 2.1 76.6
0.600 218.4 222.8 2.0 76.1
0.650 219.9 221.3 0.7 77.3

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

0.050 24.3 26.7 10.0 72.4
0.400 49.4 56.5 14.5 80.4
0.200 94.7 102.7 8.5 81.8
0.300 122.0 131.6 7.9 73.8
0.400 136.4 147.6 8.2 71.0
0.450 139.6 161.6 15.7 74.5
0.500 141.2 166.4 17.8 75.7
0.550 142.8 169.6 18.7 76.6
0.600 143.6 169.6 18.1 76.1
0.650 143.6 171.2 19.2 77.3

Work done.  Flow Cut seats, flow test, valve job, set up springs     $389.00    4/01

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