Elelbrock Pontiac 400 Alm.
2.11 Intake & 1.65 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 | 32.6 | 39.0 | 19.6 | 68.4 |
| 0.100 | 69.5 | 71.8 | 3.3 | 84.3 |
| 0.200 | 137.6 | 143.6 | 4.3 | 81.6 |
| 0.300 | 196.1 | 203.5 | 3.8 | 77.3 |
| 0.400 | 243.6 | 246.6 | 1.2 | 77.8 |
| 0.500 | 273.3 | 281.4 | 2.9 | 75.0 |
| 0.600 | 290.3 | 299.3 | 3.1 | 72.7 |
| 0.650 | 294.8 | 310.4 | 5.3 | 71.1 |
Exhaust Port Test Results
Lift
Previous CFM Current CFM
% Gain Exhaust/Intake
| 0.050 | 26.3 | 26.7 | 1.5 | 68.4 |
| 0.100 | 56.9 | 60.5 | 6.3 | 84.3 |
| 0.200 | 110.7 | 117.2 | 5.8 | 81.6 |
| 0.300 | 150.9 | 157.3 | 4.3 | 77.3 |
| 0.400 | 185.6 | 192.0 | 3.4 | 77.8 |
| 0.500 | 201.6 | 211.2 | 4.8 | 75.0 |
| 0.600 | 208.0 | 217.6 | 4.6 | 72.7 |
| 0.650 | 211.2 | 220.8 | 4.5 | 71.1 |
Work done. Ported, flow test, valve job, set up springs. $805.00 4/01