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  •  » 66 Mustang EFI hoses

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    6/15/2022 9:20 AM  #1

    gkm24
    FYI Addict

    Offline

    From: Winchester, Hampshire, England
    Registered: 6/08/2013
    Posts: 108

    66 Mustang EFI hoses

    What hoses are those that have the 5.0 HO EFI engine in their 65/66 Mustangs using?
    I have sourced a top radiator hose and I assume that the hoses from the water pump to the thermostat housing and the heater pipe are standard. The hoses that I am struggling with are the Bottom hose for water pump to radiator ( on the left hand side as seated in the driver seat ) and the hoses from the heater box to the flow and return heater pipes on the engine. Other than that, I still have to make a mount for a Gas pedal and I should be good to go. Its been a long journey and thanks to help from lots of you, especially Bullet Bob, I have enjoyed the experience.

     

    6/15/2022 9:46 AM  #2

    Bullet Bob
    Senior 24-7 FYI Addict

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    From: Montrose, Colorado
    Registered: 4/01/2013
    Posts: 4,887

    Re: 66 Mustang EFI hoses

    Thanks for the kudos, Graham.  I have a 20" radiator with the lower hose on the left.  I am using a 70 small block lower hose...I think.  It's been on there for over 15 years and my memory is OLD.  As for the heater connections I can only suggest trying various combinations of molded short hoses such as the Fox Mustang used...and don't forget the molded hoses at the front of the 5.0.  Those molded hoses can be cut and spliced to create a lot of different combinations.  Also, my high speed cooling was greatly improved by the addition of a spring in the lower hose.  Also a proper fan shroud is essential in my opinion.
    Good luck, I'm glad to hear that it's getting close.

    BB1
     

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    6/16/2022 11:24 AM  #3

    BobE
    Senior 24-7 FYI Addict

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    From: White Plains, NY
    Registered: 4/04/2013
    Posts: 2,640

    Re: 66 Mustang EFI hoses

    Note that the early thermostat to water pump ‘bypass’ hose had 5/8” hose on both ends, while the later T-Housings had a ¾” hose end, while retaining the 5/8” on the water pump.
    Heater hose routing: upper heater hose (return) goes to the water pump; lower heater hose (supply) goes to intake manifold.

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

     

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