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Head Flow Comparison

Stock (cfm) Extrude Honed (cfm) Airflow Dynamics Ported (cfm) Esslinger Aluminum (cfm)
Lift in Inches Intake Exhaust Intake Exhaust Intake Exhaust Intake Exhaust
0.100 58 42 54 49 56 49 65 51
0.200 108 81 103 89 120 88 116 101
0.300 141 112 144 115 173 142 162 134
0.400 149 132 164 140 202 156 201 154
0.500 149 142 187 168 NA NA 228 172
0.600 NA NA NA NA NA NA 241 183

The Airflow Dynamics head was done by Scott Jennings of Airflow Dynamics. The porting done by him on a stock cast iron head was designed to maximize flow at near-stock levels of valve lift, and was not flow tested above 0.450" lift. As you can see from the numbers, with the right porting the stock head can be competitive with the stock Esslinger aluminum head at stock lift.


 

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Page last updated: Friday, 28-Oct-2005 11:26:05 EDT