When you say timing is good? What do you mean? Are you using a vacuum advance? If so, plug it or delete it. Does the engine have fast burn heads? If so don't use vacuum advance and total of 29 degrees of timing should be in by 3000 rpm. If not using fast burn heads, set base timing to 20 BTDC and eliminate vacuum advance. Then try tuning your carb.
Admin for Turbobuick.com
87 GN, and new toy: 1955 Chevy 3200 pickup, soon to have: 383, Cola crank, Childs/Albert 6 inch rods, Brownfield heads, 10:1 KB hypers, CompCam 284 Extreme Energy, Tilton Plate transmission realignment and built Turbo400.
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