327_TPI_77_Maro

iTrader: (8)

Hi guys I have my CCC Qjeted 305 roller motor running in my 1983 Firebird. The longblock is a 305 TPI motor but I have equipped it with all electronics and emissions equipment for an 83 CCC Qjeted car. I have the car running, timed properly, and I have been reading the mixture solenoid dwell using a dwell meter on 6 cylinder scale. The carb is a fresh rebuild that I just did. I have a lot of experience rebuilding carbs including Quadrajets, but this is my first CCC Qjet. The carb is from an 83 305 Caprice. I have the idle screws accessible if they need to be adjusted. I adjusted the idle air bleed until I get 30-35 degrees dwell at idle in closed loop. However the exhaust note is still a little uneven. The motor is a fresh rebuild so it is not a mechanical issue, it is carb tuning. Just because I have my dwell set correctly does not necessarily mean my idle screws are perfect, does it? It seems I had to back the idle air bleed out a ways further than the 305 caprice had it adjusted to get the dwell at 30 degrees. Should I try adjusting the idle screws in small increments and then readjusting the idle air bleed? Are the idle air bleed and mixture screws doing EXACTLY the same thing or are they on overlapping circuits but I will get slightly different results using each independently as adjustment points?