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    1. #1
      Join Date
      May 2003
      Location
      St. Charles, Mo
      Posts
      424

      Accel DFI Tuning Question, hard to start

      My BBC 427 is equipped with an Accel DFI Superam system. The engine should produce between 575 and 600 hp. It has a Comp Cams 288/.653 solid roller cam, 10:1 pistions, and the usual performance upgrades.

      I spent some time getting the timing set, adjusting the idle, throttle position, and a few others things. It idle good at about 850 rpm with the IAC position at about 9.5 when ideling.

      The fuel injectors are only 30 lb/hr which should be about 42 lb/hr. Would that be the cause for poor starts? In the system configuration screen, I set the injector size to 30 lb/hr so I would think it would adjust the pulse width to compensate. Is it just not enough pulse width there for priming with that small injector? It does idle fine. There is a slight hessitation off idle when you rev it up. Nothing crazy yet, its only been running for a total of 30 minutes so far. I was able to pull it out and back into the garage under it's own power (for the first time since I bought it 8 years ago.) Should I just mess with the starting fuel coefficient until it seems to work? I am a bigginer at the fuel injection stuff and Jody says that it is a pain to cut your teeth on.



      If anyone has a suggestion, I'm all ears.

      Thanks,
      Dennis



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