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Vacuum Advance Distributor...Port Vacuum or Manifold Vacuum?

Discussion in 'The Garage' started by 1-ton, Feb 18, 2005.

  1. 1-ton

    1-ton 1/2 ton status Premium Member

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    It has been a while since I have owned a carbureted vehicle with a vacuum advanced distributor. I have forgotten if the vacuum advance on a distributor connects to port vacuum or manifold vacuum? I think I remember it being port vacuum, but I am not sure.
     
  2. sled_dog

    sled_dog 1 ton status

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  3. 1-ton

    1-ton 1/2 ton status Premium Member

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    Thanks. :)
     
  4. diesel4me

    diesel4me 1 ton status Premium Member

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    both ways on some years......

    Most Chevy motors used ported vacuum,but some during the emission years used maifold vacuum--I've swapped mine around,and didnt notice that much difference,ported seemed a little more peppy,so I left it that way--only way to tell which works best for you is to try it both ways,and see how it runs...:crazy:
     

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