General Category > Quadrajet Carb Talk and Tips

Edelbrock 850 performer q jet

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Chevelless:
I have a 850 Edelbrock performer carb on a 402 bbc, 573 lift cam, performer rpm intake, headers and factory heads gasket matched.
Is the idle circuit to big for this application?

77cruiser:
What's the rest of the cams specs? What's the C/R?

Chevelless:
Hi Jim
     C/r 10.07 to 1                       
                                            Intake.        Exhaust
Cam duration ar.006                 300               306
        Duration at .050.             240.               246
        Lift at cam.                     .330.             .337
        Lift at valve.                    .560.             .573
        Timing  at .050.              Open.            Close
          Intake                           10 btdc.         50 Abdc
          Exhaust.                        57 bbdc         9 atdc
          Centerlines.               Intake 110
         Lobe separation                     112
       

qjetsrule:
What problems are you having at idle?

Chevelless:
Black smoke at idle

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