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Brake Conversions Tech info on converting from drum to disc

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  #1  
Old Oct 2nd, 99, 9:43 PM
66Chevelle 66Chevelle is offline
 
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Wanting to convert the brakes on a 66 Chevelle from drum to Disc. We read on this forum where we can modify the exsisting spindles to mount the calipers. My question is, what rotors and calipers will fit the converted drum spindles?
Thanks,
Rob
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  #2  
Old Oct 3rd, 99, 4:21 AM
Scott67 Scott67 is offline
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Rob an even easier thing to do would be to check out local junk yards for 68-72 Lemans,Cutlass,Sklark or Chevelle with disc brakes. You can use the spindles off any of those cars that way you can use the rotors and calipers which are availible at any parts store.

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Scott

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  #3  
Old Oct 3rd, 99, 9:15 AM
66Chevelle 66Chevelle is offline
 
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Scott,
Thanks for the reply. Were going to the junk yard today to look for the parts.
Rob
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  #4  
Old Oct 3rd, 99, 1:36 PM
66 bowtie 66 bowtie is offline
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don't forget the montecarlo (can't spell n e thing today)

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  #5  
Old Oct 3rd, 99, 3:48 PM
66Chevelle 66Chevelle is offline
 
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Checked every junkyard within a 100 mile radius of my house and came up empty handed. If I convert the spindles will the rotors and calipers from the cars mentioned in the previous replys work?
Thanks,
Rob
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  #6  
Old Oct 3rd, 99, 10:01 PM
Clint44 Clint44 is offline
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Why not install disc brakes off a 87-94 S-10 ? They're a very easy conversion.
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  #7  
Old Oct 4th, 99, 5:10 AM
66Chevelle 66Chevelle is offline
 
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What's involved in the S-10 swap? I'm new to this so need complete guidance. Any web sites cover this swap?
Thanks,
Rob
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  #8  
Old Oct 4th, 99, 6:30 PM
Bob M Bob M is offline
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Modifying drum spindles to disk spindles is very easy. You have to have 3/4" machined off of the top threaded boss on the spindles. Make sure the remaining hole is drilled and tapped deep enough for the disk brake assembly. I would stay away from the S10 setup. I bought a 70 El Camino that had the S10 spindles on it. The ball joints don't fit right (wrong taper) and the tie rod tends to rub the tires (because of the cast-in steering arm). I'm not driving it because of this, until I change it over to the proper setup.

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Bob Murray 66 Malibu
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  #9  
Old Oct 5th, 99, 5:56 AM
66Chevelle 66Chevelle is offline
 
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That brings us back to my original question. If I convert drum spindles to disc, which calipers and rotors do I then use?
Need this information today as it's for my brother in law and he's leaving for home tomorrow and he doesn't have access to a computer there.
Thanks,
Rob
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  #10  
Old Oct 5th, 99, 9:14 AM
Bob Tiley Bob Tiley is offline
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You still need calipers, rotors, caliper mounting brackets, master cylinder and booster from a 69 to 72 Chevelle or other GM A-body car.
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  #11  
Old Oct 5th, 99, 6:47 PM
66Chevelle 66Chevelle is offline
 
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Thanks for the reply Bob.
So there's not much gained by converting the spindles as all the other needed parts are from the same series cars. If I can find the other needed parts, the spindles will be there too!
Back to the junk yards!
Rob
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  #12  
Old Oct 5th, 99, 7:00 PM
drptop70ss drptop70ss is offline
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where are you from, I have a couple complete conversions but dont want to ship, Im in NY..

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  #13  
Old Oct 5th, 99, 7:55 PM
Bruce Allison Bruce Allison is offline
 
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Hi Rob,

Malibu Performance (818 222 6725) makes a conversion kit to install the 11" rotors and tall spindles from a '70-81 Camaro/F-bird to the A-body. There's more about this conversion in the tech files of this site.

Good Luck,
Bruce
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  #14  
Old Oct 6th, 99, 4:01 AM
Len Len is offline
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...the problem with converting your drum brake spindles for use as disc, is finding the correct caliper brackets.

If you can find them no problem. They ARE being reproduced... a mere $200 something a pair... ouch.

Heck I can find COMPLETE used '67-72 disc brake setups for that price (you probably can too).

I see the mention of the late model S10 &/or G-body spindles being used.... with their cast in place (vs bolt on) steering arms... are these steering arms the SAME exact length? (relative to the original steering arm length/position)

If NOT, I would worry about bump steer.. wrong ackerman, etc. in general, everything being "out of whack".

[This message has been edited by Len (edited 10-06-99).]
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  #15  
Old Oct 6th, 99, 7:02 AM
DG DG is offline
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Again, I just wanna mention my setup.
70 Malibu with 73+ spindles. Yeah I have to convert the lower ball joint (basically use a 73+ lower ball joint with 0.070 machined off the base where it is press fitted).

Advantage: Taller spindle, (added a few shims), bigger rotors, and cheaper rotors, pads and calipers.

Disadvantage: Slower turning??, Custom ball joints. If you have excessive frame sag or clearence problems you might need an offset upper control arm shaft as well as custom upper a-arms.


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DG
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