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turbo tree fiddy question

Discussion in 'The Garage' started by 85burbanator, Nov 30, 2005.

  1. 85burbanator

    85burbanator 1/2 ton status

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    i just installed a 350 trans in my 88 and am having trouble coming up with a vacuum solution to the modulator. can i use a lenght of steel brake line in the proper size and then use some vacuum hose on the ends or should i use vacuum hose from the modulator up to the motor? also what should i tie the vacuum into? i took a th400 out of a fuel injected blazer once but cant remember what the line from the trans tied into.
     
  2. BobK

    BobK 1/2 ton status Premium Member

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    Some 1/4" hard line should be fine.short piece of rubber line at each end.
    Tie into manifold vacume.There is usually a spot at the rear of the intake for this.
     
  3. sweetk30

    sweetk30 professional hooker Premium Member

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    i used 3/16 line on mine no problems. manifold vac .
     
  4. dremu

    dremu Officious Thread Derailer Premium Member GMOTM Winner

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    Use brakeline ... vacuum hose that long WILL expand and shrink and get hot and become an oily sticky melting mess by your exhaust manifold. Ask me why I know this ($&@^$&*@ing previous owner...)

    -- A
     
  5. 85burbanator

    85burbanator 1/2 ton status

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    so 1/4 inch steel brake line would be best then? were about on the manifold would the port be(is there one?) the one i took off on the blazer was at the back but if i remember correctly the po spliced it in to a vacuum line via a Y shaped splice and i cant recall were it all pluged in at.
     
  6. BobK

    BobK 1/2 ton status Premium Member

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    Yes,1/4" or 3/16" hard line will be fine.
    The vacume port is located back behind the carb,infront of the distributor,off to the passenger side just a little bit.
    It's common to have a "Y" ot "T" fitting on there as that is where the A/C get's its vacume from(goes to vacume canister).
     

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