low vacum with 308 s cam

Discussion in 'Race 400/430/455' started by jim buick, Jul 31, 2003.

  1. jim buick

    jim buick New Member

    I have a 455 with 308 s cam, SP 1, dominator 1050, 12.5 to 1 comp., and 1" spacer. The highest vacum reading I have achieved is around 5" at idle. Is this kinda low or normal for this cam. No leaks that I can find and idles quite well. Any help?
     
    jim buick, Jul 31, 2003
    #1
  2. buick535

    buick535 Well-Known Member


    That cam was not exactly designed for hgh vac. at idle. WHat kind of timing are you running at idle? More timing can give more vac. I would not be surprised with idle vac. in that range with that big of a cam. Jim Burek
     
    buick535, Jul 31, 2003
    #2
  3. buicksstage1

    buicksstage1 Well-Known Member

    SAME AS MINE

    Hi Jim, I have 13:1 and 308s and I have about the same vacuum. Chris
     
    buicksstage1, Aug 3, 2003
    #3
  4. jim buick

    jim buick New Member

    Thanks for the reply.

    Cam timing is at 12 deg. it seems to start the best around there.
    Just want to make sure I dont have A carb problem or any thing.
    :)
     
    jim buick, Aug 10, 2003
    #4
  5. staged67gspwr

    staged67gspwr "The Black Widow"

    Dont feel so bad i have about 6" of vacuum with my hydraulic cam the TA 290-08H at idle with about 16* initial timing.


    Thanks
     
    staged67gspwr, Aug 10, 2003
    #5

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