From the Archives section; I jetted down as well to 68's and liked it.
Quote:
I am running a 305 with 9:1 compression and Magnum components. Plus an HEi using full manifold vacuum. It seemed to be not running as well it should. The engine was operating too rich. The Holley carb comes with 73 size jets and i changed to size 65. This made a noticeable difference in performance. The only problem was a sight hesitation at cruse speeds.
I increased the jet size to 68
and it is smooth for all RPMs. The std 73 jets may be fine for 401/478 motors, but the smaller 351/305 may need some tuning.
Edwin Erlbacher Dallas TX
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