Since my T2 was more opened up and stayed with the Holley, so probably could be better numbers than the one Steve tested.
Most dual planes I have flowed had different numbers for upper and lower plenums on almost every cylinder. The larger plenums and runners on an RPM over a stock intake might be a little better but I've seen 5% difference between upper and lower runners.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
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