Reply to "Holley 650"

George PAdmin.

Insufficient initial ignition advance ...

Initial advance should be set in the range of 18 degrees BTDC, or as much as your motor will tolerate and still start when its hot, with the vacuum advance connected to "ported" vacuum.

Ideally you want to twist the distributor to achieve the highest possible intake manifold vacuum at idle. But of course, too much initial advance may make the motor too hard for the starter to crank when the motor is hot. Its possible to run a Cobra Jet at 20 degrees BTDC.

The problem would progressively worsen if some of the various slots or holes exposed below the throttle plate were slowly being plugged with carbon.

-G

10/23/1012:25 AM

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