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I have a question , If i swap over to a 1981-3 Drum brake set up ( drums are available) , would the only thing I need be a 83 backing plate or do i have to get a all the hardware and swap over to the drum cylinders as well?
79-80 is M10x1.25 and 81-85 is M10x1.0 for the brake lines. You already know about the backing plate. You have to pull the axles and remove the bearing and collar to replace the backing plate.
This summer I'll be working on making a rear conversion for 1979-1980 to some form of modern disc brakes. Probably a fox body Mustang rear disc.
Last edited by KansasCityREPU; 12-17-22 at 10:33 AM.
79-80 is M10x1.25 and 81-85 is M10x1.0 for the brake lines. You already know about the backing plate. You have to pull the axles and remove the bearing and collar to replace the backing plate.
This summer I'll be working on making a rear conversion for 1979-1980 to some form of modern disc brakes. Probably a fox body Mustang rear disc.
I'm highly interested . Keep me posted , This is a top priority for me. The Drums work fine but they are within 20% of being out of spec .
Interested in what might happen as well. My drums are out of spec and I need to find a solution at some point here. Haven't been able to find drums for 1980 that aren't $300 a pop.
Was thinking about swapping to FB drums as I have the parts, but it looks like the drum availability for them are hit and miss now too.
Interested in what might happen as well. My drums are out of spec and I need to find a solution at some point here. Haven't been able to find drums for 1980 that aren't $300 a pop.
Was thinking about swapping to FB drums as I have the parts, but it looks like the drum availability for them are hit and miss now too.
That's also my experience. I'm willing to make the adapter plates and even the dust shields. If someone has a design or a good choice for which disc brake calipers to use I'm open. I'd rather not get into some sort of BBK that requires new wheels. The requirement needs to be something that will fit a stock wheel or a 15x4x110 +20 like the Rewinds. I'm willing to do both of those.
One of the hard parts might be finding a rear disc. Whatever is found would need to be drilled to 4x110 or 4x114. Would like to stick with a factory axels at first, this way it will help more folks.
Last edited by KansasCityREPU; 12-21-22 at 12:22 PM.
That's also my experience. I'm willing to make the adapter plates and even the dust shields. If someone has a design or a good choice for which disc brake calipers to use I'm open. I'd rather not get into some sort of BBK that requires new wheels. The requirement needs to be something that will fit a stock wheel or a 15x4x110 +20 like the Rewinds. I'm willing to do both of those.
One of the hard parts might be finding a rear disc. Whatever is found would need to be drilled to 4x110 or 4x114. Would like to stick with a factory axels at first, this way it will help more folks.
Factory axles is a must , if we have to swap axles we might as well swap rear ends since sourcing the axles alone is hard.
I keep reading Re speed made adapters ? What set up did they use ?
EDIT , doesnt techno toy tuning sell a big disk kit with 4x110 disks ?
Factory axles is a must , if we have to swap axles we might as well swap rear ends since sourcing the axles alone is hard.
I keep reading Re speed made adapters ? What set up did they use ?
EDIT , doesnt techno toy tuning sell a big disk kit with 4x110 disks ?
RESpeed had a drum to disk conversion. Haven't held one. I'll see if I can dig up some pictures. it was a pretty simple solution.
T3 does make a BBK, but my dual is to maker something that is low cost and uses stuff we can get from any auto parts store.
RESpeed had a drum to disk conversion. Haven't held one. I'll see if I can dig up some pictures. it was a pretty simple solution.
T3 does make a BBK, but my dual is to maker something that is low cost and uses stuff we can get from any auto parts store.
I only say that because they source their disks from willwood. I think its fair to say we are willing to pony up the cash for the disks as long as we can obtain them with ease.
They sell Blank disks as well . If you could find cheap auto parts store alternatives that would be a plus honestly!
RESpeed had a drum to disk conversion. Haven't held one. I'll see if I can dig up some pictures. it was a pretty simple solution.
I remember seeing CAD images of brackets but I don't remember them making it to production. I made my own brackets a while back. At the end of my post I noted that ~2000 Hondas used almost the same disk diameter and thickness so maybe their calipers could be adapted.
Other than brackets, parking brake cables, brake line tee, and something to retain the axle would be needed for a conversion.
I remember seeing CAD images of brackets but I don't remember them making it to production. I made my own brackets a while back. At the end of my post I noted that ~2000 Hondas used almost the same disk diameter and thickness so maybe their calipers could be adapted.
Other than brackets, parking brake cables, brake line tee, and something to retain the axle would be needed for a conversion.
I Love how you ended up using the original backing plate as a retainer .
I remember seeing CAD images of brackets but I don't remember them making it to production. I made my own brackets a while back. At the end of my post I noted that ~2000 Hondas used almost the same disk diameter and thickness so maybe their calipers could be adapted.
Other than brackets, parking brake cables, brake line tee, and something to retain the axle would be needed for a conversion.
Thx. This give me a good starting point. I sold my 1975 REPU just to by a 4x8 CNC Plasma table. Learning Fusion360 has been a challenge but rewording when a cut works. I'll take your drawing and create a dfx in Fustion360 to cut on the CNC. I also have a 1885 RX-7 parts mule rear drum to test on. Just need to buy the Honda disc and caliper. I might do some research to see if any Mustang stuff is close to RX-7 specs.
I won't be able to do anything till this spring. My barn isn't heated and dam it's cold.
Thx. This give me a good starting point. I sold my 1975 REPU just to by a 4x8 CNC Plasma table. Learning Fusion360 has been a challenge but rewording when a cut works. I'll take your drawing and create a dfx in Fustion360 to cut on the CNC. I also have a 1885 RX-7 parts mule rear drum to test on. Just need to buy the Honda disc and caliper. I might do some research to see if any Mustang stuff is close to RX-7 specs.
I won't be able to do anything till this spring. My barn isn't heated and dam it's cold.
I feel I robbed the world when I decided to study law instead of CNC machine work . I was naturally gifted at cad in highschool . I Passed with a A + and so much spare time that I designed and made a semi functional battle tank sans the engine and cannon mechanism , the treads and hatches all worked! I have never used CAD since but a lot of the stuff i see I feel i could make since I was taught to backwards engineer designs and input from blueprints into our CNC machine and 3D printer ( in 2010 those were expensive.) I wish i had continued learning how to work with CNC and autocad since I enjoyed that class so much and it was genuinely rewarding and " clicked " . The issue is we were never taught this was a valuable field and coaxed into going to college . I enjoy the law but after having worked at a law firm for a bit , I don't enjoy it nearly as much. That and I'm dyslexic so when I type on a keyboard, I sound like a idiot. I feel stupid not knowing how to design these things when I know I'm capable .
Well, you might make more money with a law degree then you can get your own CNC mill.
Glad to see more development for the drummers.
Epilogue to that project: Either my measurements were slightly off or the bolt holes had too much clearance so about .1" of brake pad is off the disk. Pretty sure I measured twice.
I'll be switching to a GSL-SE rear soon so that will no longer be a problem.
Well, you might make more money with a law degree then you can get your own CNC mill.
Glad to see more development for the drummers.
Epilogue to that project: Either my measurements were slightly off or the bolt holes had too much clearance so about .1" of brake pad is off the disk. Pretty sure I measured twice.
I'll be switching to a GSL-SE rear soon so that will no longer be a problem.
The law degree is nice if you are willing to be in poverty for ten years 😂 , I got a half scholarship and the hole looks five years deep for me , at least I had the privilege . Alot of lawyers don't tell you they work for a family firm or had their firm pay for lawschool so they are balling fresh out of lawschool.
Also it seems like you didn't account for the brake pad slack , they all move just about that much , my guess is once the groove set in they never sat back down , either way that really cool you managed to make it work !
12-17-22, 01:36 AM
