Thread: Kind of a Drag

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Originally Posted by Good Wrench

Vacuum runs nominally at 19-20. With the edelbrock 1406 600 cfm it idles at 950 rpm and 12 on vacuum. With a quck fuel (Aka Holly) 750 cfm it idles 950 rpm at 19 vacuum. Almost 20.

The vacuum readings above points to a problem with your Edelbrock carb. And if I remember correctly this is the carb with the whistle. It appears the carb has a vacuum leak, look for a cracked throttle base (not uncommon if over tightened), or an open passage way at the carb base, possibly an incorrect carb to throttle base gasket.

Originally Posted by Good Wrench

I went home and put the Edelbrock 1406 back on and reconnected the vacuum advance and retarded the distributor by ear.

Move your vacuum advance to venturi port and re-set your initial timing correctly.