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2nd Gen Big Brake Kit?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Shaun017, Dec 10, 2019.

  1. Dec 10, 2019 at 11:11 PM
    #1
    Shaun017

    Shaun017 [OP] Member

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    So I have a full long travel suspension truck on 35's and definitely need bigger breaks up front.
    Any suggestions?
     
  2. Dec 10, 2019 at 11:14 PM
    #2
    BVita

    BVita Mall Cruiser

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    Stoptech makes a kit. I believe Wilwood and R1 Concepts makes one as well.
     
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  3. Dec 10, 2019 at 11:16 PM
    #3
    crashnburn80

    crashnburn80 Vehicle Design Engineer

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  4. Dec 10, 2019 at 11:59 PM
    #4
    DG92071

    DG92071 Well-Known Member

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    2010 and newer 4Runner rotors and calipers are bigger and it's a bolt on. Cut your existing backing plates or use the ones for the 4Runner and it's all bolt on. Get the StopTech rotors and calipers and pads for the 4Runner. 2007 and newer Tundra has a bigger master cylinder and a dual diaphragm booster and other than the lines it's also a bolt in.

    No on second thought just hit the gas pedal instead.
     
  5. Dec 11, 2019 at 1:55 AM
    #5
    ovrlndkull

    ovrlndkull STUKASFK - HC4LIFE

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    I'll add this to the mix as well. Personally I am going to do the 5th gen 4runner front brake upgrade. If you look at the specs of the rotors for these big brakes most are the same Dia. as the 5th gen 4runner, so you are paying quite a lot for those calipers. If you do the 4runner brake upgrade I know a few people who have and now have a soft pedal I'd get the SOS sequoia master cylinder adapter and throw one of those on. It's meant to move more fluid.

    https://sosperformance.com/t/tacoma-2005-2015

    5th gen 4runner
    https://www.tacomaworld.com/threads...unner-bbk-upgrade-for-2nd-gen-tacomas.504234/
     
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  6. Dec 11, 2019 at 6:31 AM
    #6
    DG92071

    DG92071 Well-Known Member

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    I looked but I don't see a Sequoia master cylinder adapter and I don't have a clue what it would be as the master cylinder is a bolt on minus the brake lines.

    Sequoias and Tundras use the same master cylinder and booster.

    I'm pretty sure a 2010 4Runner is a 5th gen.
     
  7. Dec 11, 2019 at 12:00 PM
    #7
    ovrlndkull

    ovrlndkull STUKASFK - HC4LIFE

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    https://sosperformance.com/products/2005-2008-master-cylinder-kit It adapts the sequoia master cycl to the tacoma brake booster. I think it needs to be the later 5th gen 4runners as that is what most people are using for the brakes I have not done any cross referencing to see if there are any differences.
     
  8. Dec 11, 2019 at 1:32 PM
    #8
    crashnburn80

    crashnburn80 Vehicle Design Engineer

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    The brakes changed in 2010 on the 4runner, which is why you want 2010+. Note the master cylinder sequoia upgrade will not work with Off Road or Pro trucks equipped with ATRAC.
     
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  9. Dec 11, 2019 at 1:52 PM
    #9
    nd4spdbh

    nd4spdbh Well-Known Member

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    And you likely wont need a different MC anyways as the electric boosted setup is already used on the bigger brakes of the 4runner.
     
  10. Dec 11, 2019 at 1:56 PM
    #10
    crashnburn80

    crashnburn80 Vehicle Design Engineer

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    Electric on all models, or just the 4runner models equipped with ATRAC? The 4runner has a larger master cylinder than the Tacoma, the front calipers have larger fluid volume and the rear disks take significantly larger fluid volume.
     
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  11. Dec 11, 2019 at 1:59 PM
    #11
    ovrlndkull

    ovrlndkull STUKASFK - HC4LIFE

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    What do you mean by this???
     
  12. Dec 11, 2019 at 3:26 PM
    #12
    Shaun017

    Shaun017 [OP] Member

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  13. Dec 11, 2019 at 3:28 PM
    #13
    Shaun017

    Shaun017 [OP] Member

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    Took me a minute to figure it out, but oi did post a couple pics.
     
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  14. Dec 11, 2019 at 4:24 PM
    #14
    nd4spdbh

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    Front calipers are slightly larger pistons, which could increase mushiness, but will make it to where you have more mechanical advantage as far as clamping force for same pedal pressure.

    As far as the rear's, the 4 runners have a single piston floating calipers with a piston similar in volume as piston in the drums on our trucks.

    AFAIK, all the runners have come with the electric boosted master cylinder thats been around for a long time. This MC produces 2x the line pressures at the same pedal pressures as the stock tacoma vacuum model, and its probably why those people who have the vacuum model who have done the bigger 4 runner rotor/caliper upgrade feel its mushy as you are now pushing more pad on rotor
     
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  15. Dec 11, 2019 at 4:51 PM
    #15
    ovrlndkull

    ovrlndkull STUKASFK - HC4LIFE

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    Pedal feel to line pressure isn't relative when its 2 different systems at the user end of the brake system. We are comparing stock sized tacoma to a larger sized braking set up using a stock tacoma MC. It's all about the volume that the MC is able to move compared to the volume at which the calipers or pistons need to move a given distance. There are some calculations you need to do to allow for this. This is also why the pedal sinks further or feels mushy when the rear drums are out of adjustment is the piston is having to move a greater distance or need more volume of fluid the pressure will stay the same. This came about in Nates build thread when he had a really spongy pedal after doing his SAS and found the calculations and what not upped the size of the master cyl. problem solved.
     
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  16. Dec 11, 2019 at 5:04 PM
    #16
    DG92071

    DG92071 Well-Known Member

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    The bigger Tundra master cylinder will move more fluid quicker. It will make the brakes come on quicker and the peddle stiffer. That's why Toyota improved the booster on the Tundra. So if a person short changes their booster and stays with the Tacoma booster... idk doesn't make sense to me. The Tundra booster bolts right in.
     
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  17. Dec 11, 2019 at 5:13 PM
    #17
    ovrlndkull

    ovrlndkull STUKASFK - HC4LIFE

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    I agree the tundra MC is bigger and moves more fluid and can make a same sized system "come on quicker". I don't know where you are going with the booster though how is the booster better on the tundra? Have you compared the Tacoma booster with an adapter to run the sequoia MC to a tundra booster with the same set up? I haven't seen a thread about the tundra booster bolting up, haven't really looked either, but I'd be interested in reading up on it. First gen Tundras actually had issues with their braking systems, there was a TSB out to change calipers and rotors. I believe there was one out as well for the MC at one point (I don't 100% remember that). So it wouldn't surprise me that some people took updated tundra parts and and are comparing them to tacoma and saying they are better even though that may only be true when compared to the original tundra ones not necessarily the tacoma. I am open to seeing what you are talking about and reading up on it before I make that assumption my assertion.
     
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  18. Dec 11, 2019 at 8:06 PM
    #18
    DG92071

    DG92071 Well-Known Member

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    I have not compared the smaller Tacoma booster with the bigger 4Runner front brakes verses the Tundra booster with the bigger 4Runner brakes because I am uninterested in using the smaller Tacoma booster with the larger Tundra master cylinder and getting the same results everyone else gets with that combination which is a mushy pedal. It's a no brainer decision for me.

    I don't have a clue what you're trying to write about updated parts vs older parts and "some people"... I'm writing that the Tundra's booster is far better than the Tacoma's and Toyota did it for a reason on the larger Tundra truck.

    Have you actually done this swap to any extent?
     
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  19. Dec 12, 2019 at 3:38 AM
    #19
    ovrlndkull

    ovrlndkull STUKASFK - HC4LIFE

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    Why are they getting a mushy pedal with a tundra master on a tacoma booster or are they in general getting a mushy pedal after a brake upgrade and just swapping everything over.
     
  20. Dec 12, 2019 at 7:28 AM
    #20
    DG92071

    DG92071 Well-Known Member

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    I don't know how else to write it for you, the Tundra booster is bigger than the Tacoma booster so they're getting a mushy pedal because their Tacoma booster is too small for the larger brakes and larger master cylinder. That is why Toyota put a different booster on the Tundra vs the Tacoma - so it would match the respective master cylinders.

    Again, have you personally done any of this brake swap or are you regurgitating what you've read?
     

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