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350 Going Boom, Won't Start

Discussion in 'Small Block Tech' started by patwhac, Aug 17, 2015.

  1. LARRY70GS

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

    A bushing will reduce the mechanical advance. The only other way is to disassemble the distributor, then weld the slot, and custom grind it for the advance you want. That isn't easy to do. Some aftermarket distributors have adjustable mechanical advance. (MSD, Mallory, etc.)
     
  2. patwhac

    patwhac Well-Known Member

    It's a Dave Ray converted HEI, so it's already electronic, but I guess he didn't change the amount of built in advance.

    Got it. I'm going to try and machine my own set of different sized bushings since I can't seem to find a kit of them anywhere! I wonder if they are just press fit or threaded?
     
  3. LARRY70GS

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

    Dave's distributors are usually spot on. I think you are wasting your time. The bushings are ROUND and press fit. The slot is a fixed width on a stock distributor. That means the bushing can only be so wide before it binds in the slot. The MSD slot is wider, so it can take a variety of bushings to adjust the mechanical advance.

    If I remember correctly, you are trying to solve a detonation problem. If you cannot get anywhere by limiting your total advance, reducing your mechanical timing won't eliminate the problem. The engine may have too much compression to run pump gas.
     
  4. 8ad-f85

    8ad-f85 Well-Known Member

    Maybe this was covered way back, but if you are having detonation problems with only 26* total timing, your engine has some very serious issues!

    What is your cranking psi (WOT) ?
    Which plugs, what thermostat?
    If unsure how this stuff affects a detonation prone engine, please spend some time on Google.

    This is kind of frustrating to follow, watching one post at a time and never really addressing the root problems.

    Best of luck to you
     
  5. sean Buick 76

    sean Buick 76 Buick Nut

  6. LARRY70GS

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

  7. sean Buick 76

    sean Buick 76 Buick Nut

  8. LARRY70GS

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

  9. Reidk

    Reidk Well-Known Member

    Is this a problem I will have too?
     
  10. patwhac

    patwhac Well-Known Member

    Yes, I would get a Speedi Sleeve if you can, it's cheap and easy to install with some JB weld.
     
  11. Reidk

    Reidk Well-Known Member

    I ended up getting one. Firing motor fire the first time tomorrow
     
    patwhac and BuickV8Mike like this.

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