Initial timing-Ported vs Manifold vacuum

Discussion in 'Small Block Tech' started by cb3071, Oct 6, 2010.

  1. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

     
    Last edited: Oct 8, 2010
  2. cb3071

    cb3071 Well-Known Member

    That makes sense with my 2bbl dist. Now I better understand the process of getting the total timing right and manifold vs ported along with the mechanical.

    Your right about distributors not all being equal. When we took ours out to "rebuild" it the grease chamber was full of solidified gunk-a mud bee had built a nest under the breaker plate and the shaft was discolored from all the heat build-up. Has been running like ths for over a year. Works better now!

    Never thought about refurbishing the distributor until I wanted to recurve the timing...be be a good idea if anyone has an old one that hasn't been cleaned up in a while.

    Chris
     
  3. Tricolor72

    Tricolor72 Well-Known Member

    I never knew the distributors were different! I checked my yesterday, I was at 11* initial and total with the vacuum advance hooked up was about 44* at 3000 rpm I didnt go too crazy checking everything as it was starting to rain but those numbers seem acceptable to me and the car runs much smoother with the vacuum advance (as it should) I am paranoid though as I hear occasional popping at idle and a sort of howling noise cruising on the highway at exactly 2500rpm and no other rpm. I don't hear any pinging but as I have heard that doesn't always mean things are all clear. I run 89 octane just to be on the safe side.
     

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