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Rear discs, how much weight savings and other benifets?

Discussion in 'The Garage' started by rjfguitar, Dec 9, 2003.

  1. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    My back 13"x2.5" brakes on my 14BFF are getting down less than half and I am thinking about what to do. I think my drums have been turned already. My question is how much weight do the rear disks save over the big 3/4 brakes, difference in stopping power empty compared to decent working big drums? How about stopping with towing? Benifets off road? What have you guys done about the porportioning valve? If I step pretty hard on my brakes my rears lock fairly easy. thanks! /forums/images/graemlins/thinking.gif
     
  2. Sandman

    Sandman 3/4 ton status Author

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    I think you lose somewhere between 60 and 70 pounds.

    Mine stopped better than before.

    It doesnt fill up with mud and crude and it cheaper to replace the pads. Easier too.

    I didnt do anything with the porportioning valve. I did go up to a 1 ton MC though. That did make a difference.

    Its a good mod to do and well worth it.
     
  3. slimlynn1

    slimlynn1 1/2 ton status

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    I don't think it is even that much. The rotors I got were only about 7 lbs lighter than the drum.
     
  4. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

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    f14b drums are heavier than [darn]... your rotors are only 7 pounds less than them? what are they, solid gold? lead? /forums/images/graemlins/confused.gif

    j
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Depends on what brakes you had on your 14 bolt to start with. Some 3/4 ton 14 FF's got 11" x 2.5" rear brakes. The one ton brakes are considerably bigger and heavier.

    70 lbs does seem like a lot of a difference though. The backing plate with all the shoes, springs etc is about equal to the new bracket and caliper. The rotor might be 10-12 lbs lighter than the big drums. Total weight loss might be 25-35 lbs at the top end of the scale.

    Rene
     
  6. wadinator

    wadinator 1/2 ton status

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    IMO, the weight loss is a very minimal advantage of the swap. 35 lbs? Who cares?

    Self-cleaning (nice if you really get down and dirty with your truck), easier maintanence, and cheaper maintanence are the real advantages.

    I know i'll never fix the drum setup on any of my rear ends ever again. As soon as the dummies on my truck start causing troubles, they'll get replaced by discs.
     
  7. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    [ QUOTE ]
    My back 13"x2.5" brakes on my 14BFF

    [/ QUOTE ]
    I am also interested what you guys did about the stock porportioning valve.
     
  8. Beast388

    Beast388 1/2 ton status

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    [ QUOTE ]
    [ QUOTE ]
    My back 13"x2.5" brakes on my 14BFF

    [/ QUOTE ]
    I am also interested what you guys did about the stock porportioning valve.

    [/ QUOTE ]

    Personally, I didn't have to mess with the prop valve or MC. My brakes stop quite well. Is there more potential? We'll see when I swap in a 3/4 ton booster and a new MC.

    Here is a good thread that you might find helpful. /forums/images/graemlins/thumb.gif
     
  9. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

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    [ QUOTE ]
    IMO, the weight loss is a very minimal advantage of the swap. 35 lbs? Who cares?

    [/ QUOTE ]

    i dunno about other people, but dumping 35 lbs is always a good thing on my rig... its always been a bit overweight. /forums/images/graemlins/laugh.gif

    j
     
  10. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I kept the stock prop valve and used a one ton MC with my hydro boost. Braking is excellent and very well balanced. No premature rear lock-up and I can easily threshhold brake now...

    Con...no E-brake yet.

    Rene
     
  11. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    hmm, thats what I wanted to know basically, thanks guys and thanks for the link Ben! /forums/images/graemlins/thumb.gif
     
  12. mudjunkie 82

    mudjunkie 82 1 ton status GMOTM Winner

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    It is well worth the investment
     

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