I think the Q jet if a big factor in this equation-one needle and seat one small bowl.
My personal experience in my 78 TA Stock motor added a 228@ 0.050 cam -stock pump and 3/8 line ran out of gas top fo second. Added a small AC Delco electric pusher.
Added a real 430 hp 455 through mufflers on dyno with a Qjet-fell on it's face. Tried every mechanical pump-no help. Added a dead headed Mallory 140. Solved -until I uncorked the headers probably adding another 30 hp. Issues again. Added -8 from Mallory to carb and dropped the mechanical pump and it supports me into the 11s with a Qjet and now 10s with a Holley with still a factory 3.8 pickup-no sock.
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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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