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Thread: brake hose and brake line size selection

  1. #1
    How can i select/decide which brake hose pipe(diameter etc) to use for my brake system. I need to know if there are any calculations required for this...
    i have to use this with obp 0.625 inch dia master cylinder ??

  2. #2
    Select the lightest brake line available, as long as it is steel.
    Kettering University Vehicle Dynamics
    Formula SAE 2010 - 2015
    Clean Snowmobile Powertrain 2012 - 2015

    Boogityland 2015 - Present

  3. #3
    There's not much flow in brake lines, just need to hold the pressure.
    -3 lines (= 3/16" OD) are probably the most common and easiest to find the fittings for.
    Sheridan Motorsports troll (2012-2014)
    Cubicle troll (2015 - God knows when)

  4. #4
    Originally posted by onemaniac:
    There's not much flow in brake lines, just need to hold the pressure.
    -3 lines (= 3/16" OD) are probably the most common and easiest to find the fittings for.
    Bingo.
    Kettering University Vehicle Dynamics
    Formula SAE 2010 - 2015
    Clean Snowmobile Powertrain 2012 - 2015

    Boogityland 2015 - Present

  5. #5
    is the diameter of the brake hose and brake line same??

  6. #6
    Slow down there.

    Your topic post was unnecessary.

    -3 refers to the AN size specification of the lines. This will encompass the fittings you need, the brake line and hoses that will match those fittings and accessories.

    The diameter of the brake hose/line isn't that critical. -4 is also easily available for when -3 is not.
    Kettering University Vehicle Dynamics
    Formula SAE 2010 - 2015
    Clean Snowmobile Powertrain 2012 - 2015

    Boogityland 2015 - Present

  7. #7
    I want to know if there are companies that offer brake lines more than 40 inch length ? , I was searching for 50 inch and 130 inch brake lines but the maximum that I found was 40 in.

  8. #8
    25+ foot coils of brake line aren't difficult to find. just supply your own fittings and bobs your uncle.

  9. #9
    It sounds like you are only looking at flexible stainless steel braided lines. What you should look into is using steel hardline between the front and rear of your car.
    Iowa State University
    Cyclone Racing

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  10. #10
    Senior Member
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    Quote Originally Posted by MOTO909 View Post
    It sounds like you are only looking at flexible stainless steel braided lines. What you should look into is using steel hardline between the front and rear of your car.
    In USA this is cheap and available everywhere, at auto parts stores, along with the flaring tools and fittings. Used to repair rusted/damaged brake lines on street cars.

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