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    Author Topic: osac valve  (Read 1429 times)

    Offline 30below

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    • Posts: 273
    osac valve
    « on: August 30, 2009 - 01:25:41 PM »
    On my 73 Cuda the orfice spark advance control valve is mounted on the pass.side firewall and a blockoff plate beside it.Anyone know what color that plate is supposed to be?Also the OSAC,is it still available?
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    Offline Bullitt-

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    • Better Things To Come Member Since 2/16/06
    Re: osac valve
    « Reply #1 on: August 30, 2009 - 03:07:46 PM »
    Plate is natural, I suppose zinc plated silver... Never seen the valve....as long as it stays open your OK.  It's design is to close when cold & not let the vacuum advance work.
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    Wade  73 Rallye 340..'77 Millennium Falcon...13 R/T Classic   Huntsville, AL
    Screwed by Photobucket!

    Offline 30below

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    Re: osac valve
    « Reply #2 on: August 30, 2009 - 04:18:40 PM »
    The valve is still open,just put a coat of Krylon semi black on it.Zinc it is .thanks
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    Offline dodj

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    • Posts: 6197
    Re: osac valve
    « Reply #3 on: August 30, 2009 - 11:20:16 PM »
    The osac valve delays your vacuum spark advance by about 15 - 17 seconds. Hampers performance but improves emissions (NOx levels) Unless you are really concerned about originality, get rid of it.
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    Scott
    1973 Challenger  440 4 spd 
    2007.5 3500 6.7 Cummins Diesel, Anarchy tuned.
    Good friends don't let friends do stupid things. ........alone.

    Offline 30below

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    Re: osac valve
    « Reply #4 on: August 31, 2009 - 08:18:06 PM »
    Probebly run the hoses to where they are supposed to go and hide them.Just plug the distibutor vaccum?
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