Struggling With Understanding Engine Timing Concepts

Discussion in 'Engine Topic' started by Bandit723, Jul 24, 2017.

  1. 71RS6SPD

    71RS6SPD Veteran Member

    Nov 14, 2016
    I just started up my new SBC this year. I started at 32 @WOT and it was flat above 4000 rpm. I'm up to 36 now and it showed substantial improvement. Going to try more when the weather breaks - only 1k miles on it so far and was focused on carb tuning first.

    You should add vac advance for street driving. It has no effect during WOT. Improved throttle response, better mileage, cooler running, etc. Run with MANIFOLD vac - not ported vac. Idle timing advance should be in the 20's. Cruising/low/no load 2500 rpm should be around 50 advanced!
  2. bourbon_scotch

    bourbon_scotch Veteran Member Lifetime Gold Member

    Jan 10, 2003
    So your saying this distributor "knows" how to mechanically stop it at 28 degrees? So if you set it at 0 initial it would go to 28 degrees and stop there... or if you could set initial at 28 degrees it would just stay at 28 degrees? Do they make distributors with mechanical advance like that??
  3. FlaJunkie

    FlaJunkie Veteran Member Lifetime Gold Member

    Mar 24, 2001
    Rockledge, Florida
    Engine timing...gosh I have forgotten a lot about it. I use to have a screamer with the stock Z28 point distributor.

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