From: Snag_one@msn.com   
      
      I've got one on my rebuilt with mods GM 305 . I'm having problems   
   getting it dialed in , not surprising since this is my very first ever   
   Holley .   
      The carb in question is an 1850 600 cfm with center pivot bowls from   
   a 3310 . Stock jetting and metering plate . The motor is a 305 bored   
   .060 over with flat top pistons for about 9.7:1 C/R , Elgin E-922-P cam*   
   , small tube headers and an Edelbrock Performer manifold .   
   *cam specs are .444 /288°(214 @.050) intake .463/298° (224 @.050)   
   exhaust , lobe centers 107/117 and 112° lobe separation .   
      One problem is getting it to idle properly . I had the idle speed   
   screw in so far the transition ports were halfway uncovered and the idle   
   mix screws had no effect . On the advice of a Motor Trend article I   
   drilled a .093" hole in each of the primary throttle plates , which   
   allowed my to close the throttle enough that the mixture screws now have   
   an effect - but maybe not enough , as I'm only about 1/2 turn open on   
   the mix screws . I'll be pulling it off to see how much of the   
   transition port is uncovered , might need to enlarge those holes a bit   
   or open the secondaries a touch , another suggestion from that MT article .   
       The other problem is that it seems extremely easy to flood the motor   
   . I hit the pedal once and pull the choke partway out (it's like 90°   
   out) , turn it over and it catches then dies . Pump it once more and   
   open the choke a little bit might fire , but it seems to take a lot of   
   cranking to get it lit . The floats are set dry centered in the upside   
   down bowl , I can't keep it running long enough to adjust the level . It   
   was loading up at idle - I think due to unmetered fuel from the   
   transition ports - and spark plugs were carboned up , tailpipe is sooty   
   too . I'll be picking up a new set of plugs next trip to town .   
      Any suggestions at all will be considered , just don't tell me to   
   inject it cuz the wife is already thinking I'm spending too much money   
   on my toy ... doesn't help that I found a rock embedded in the drive   
   belt of my Harley this morning , that's another (transmission/primary   
   drive repairs/replacement) project that's turned into a money pit .   
      
   --   
   Snag   
   “Free speech is my right to say what you don’t   
     want to hear.” -George Orwell   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)