Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Nozzle drip on ported vac

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blazer74:
Hello,      Carb 17056228      EDL wood spacer
     036 IT     047 ICR     72/44cliffs      086 bypass air
      268H Cam 218@50   454   110/106   15- Vac
      355 SBC   Vortec Heads    9:1 Comp  Headers/Dual Exh
       Carb gone thru with cliffs parts. APT 4 and mix 3 turns.

I have a small bit of nozzle drip when using ported vac advance.
Goes away with full manifold vac and 1/2 turn less on idle screw for
650 rpm.
Would adding some more bypass air help with ITubes aready @ 036?
Everything else is good, throttle blades tight.

1974 K5 Blazer
Thanks.   Craig


               

blazer74:
Also 10 Deg initial timing

blazer74:
One more thing to add if I pull the vac line off the choke break idle rpm increases making me
Think more bypass air?

Cliff Ruggles:
Pull a vacuum line as a test, then reduce the throttle angle and re-adjust the mixture screws.  If you still have control with the mixture screws, and no nozzle drip, add some bypass air.....Cliff

blazer74:
Ok will do thanks Cliff.

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