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Rear Disc's

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Streaking10 Taco, Oct 18, 2012.

  1. Oct 19, 2012 at 9:39 AM
    #21
    The Phoenix

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    Also, this should be considered with respect to my statements regarding wild variations in load. In the case of a semi, that could be as much as 80,000 pounds distributed across 4 axles -- two on the rear of the tractor, two on the rear of the trailer.


    Hey wait... did you just call me the devil?
     
  2. Oct 19, 2012 at 9:56 AM
    #22
    MikeyLikesIt

    MikeyLikesIt Supercharged Mileage Master

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    See, I told you these threads always get town apart by some guy stating drum brakes are better.

    The discussion was which Toyota models share the same basic rear brake design, but offer disc brakes. With the intention of performing a low dollar rear disc conversion.
     
  3. Oct 19, 2012 at 10:11 AM
    #23
    92LandCruiser

    92LandCruiser Well-Known Member

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    Many class 8 trucks are going to discs believe it or not. FWIW



    and I know FAR too much about the damn systems while barely scratching the surface :frusty:
     
  4. Oct 19, 2012 at 10:16 AM
    #24
    jberry813

    jberry813 Professional Fluffer Moderator

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    The Phoenix [​IMG]
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    [​IMG]



    Well that was quick.
     
  5. Oct 19, 2012 at 10:19 AM
    #25
    MikeyLikesIt

    MikeyLikesIt Supercharged Mileage Master

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    Based on his posts just in this thread, I was wondering if he was some member who was once banned before and just came back with a changed name. I know I wasn't dropping posts like that until I got to know this forum and my truck a little better.
     
  6. Oct 19, 2012 at 10:21 AM
    #26
    jberry813

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    ^Yep. Not a doubt in my mind.
     
  7. Oct 19, 2012 at 10:21 AM
    #27
    Zombie Runner

    Zombie Runner Are these black helicopters for me?

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  8. Oct 19, 2012 at 10:25 AM
    #28
    jberry813

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  9. Oct 19, 2012 at 10:39 AM
    #29
    badger

    badger Well-Known Member

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    I know this is not a "which is better" thread, so I won't belabor it. I have built a few brake systems for vehicles from scratch and typically the rear axles in question came originally equipped with drums. The question of the disk brake conversion was there. Except in instances where the brakes had to endure long application or braking from extreme high speed, the benefit on the rear just wasn't there. The disks do have the advantage in resisting brake fade and that is what makes them so valualble in the front where braking force is very high. In fact all the disk/drum systems involved the use of a proportioning valve to dial down the braking in the rear to prevent lockup. More braking efficiency would have just meant a lower setting on the valve.

    In high performance applications like sports cars, a major factor to consider is unsprung weight. It's especially important on light vehicles with independent suspension. The decision to use disks on performance cars with 4 wheel independent suspension is largely driven by that. On a heavy solid axle, the added weight of the drum is less important.

    The need for a disk is design criteria specific, and you can't compare apples to oranges.

    Sorry if I interrupted :rolleyes:
     
  10. Oct 19, 2012 at 10:43 AM
    #30
    mjp2

    mjp2 Living vicariously through myself Moderator

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    Avoid this kit like the plague.
     
  11. Oct 19, 2012 at 10:46 AM
    #31
    jberry813

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    ^Was patiently waiting for you to post. :D
     
  12. Oct 19, 2012 at 11:02 AM
    #32
    mjp2

    mjp2 Living vicariously through myself Moderator

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    lol I was just spectating for a bit. :p

    On the bright side, at least Tundra Racing realized that its kit's parking brake it 100% useless and went with a more stout solution for those willing to shell out the cash. I hadn't seen this one before:
    That said, the stock master cylinder can only flow so much fluid. Something designed to flow for drum brake wheel cylinders is gonna have a crap time trying to keep up with the volume requirements of disc brake calipers.
     
  13. Oct 19, 2012 at 11:05 AM
    #33
    jberry813

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    :quickdraw:

     
  14. Oct 19, 2012 at 11:07 AM
    #34
    mjp2

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  15. Oct 19, 2012 at 11:49 AM
    #35
    jberry813

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    ...too much shit to list.
    Perhaps you missed the part where I linked 5 threads on the subject on the first page...
     
  16. Oct 19, 2012 at 11:50 AM
    #36
    justinh

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    There is a shop on Pirate now that is offering a similar kit, brackets, brake hoses, etc. It's only about $100. :) I was able to source my stock 4runner components (calipers and rotors) for under $100.

    They haven't come out with a parking brake kit YET though. They are waiting on some legal stuff for that supposedly.
     
  17. Oct 19, 2012 at 11:53 AM
    #37
    tx novice

    tx novice Foward momentum

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    xrunner.jpg Sorry this was the only picture i had. I deleted the rear brake picture by mistake. SOS Performance did their homework on the rear disc conversion and bbk. Brake system worked BETTER than stock PERIOD ( also had steel braided lines f&r )! No mushy this or that. I Know cause I had them for at least 3yrs. NO COMPLAINTS .
    If you wanna do it. Than do it. Nothing to worry about.:D
     
  18. Oct 19, 2012 at 11:56 AM
    #38
    MikeyLikesIt

    MikeyLikesIt Supercharged Mileage Master

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    Link??!!
     
  19. Oct 19, 2012 at 12:04 PM
    #39
    jberry813

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    It's for 5 lugs only, not sure if that matters to you or not.
    More importantly, I'm pretty sure SOS shut their doors a few years ago.
     
  20. Oct 19, 2012 at 4:55 PM
    #40
    maineah

    maineah Well-Known Member

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    All of our cop cars had rear disks (both Ford and Chevy) they stopped fine and probably were a good thing on a cop car but they were a maintenance nightmare with hanging parking brake systems, sticking calipers and rotor issues.
     

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