drum to disc- need help quick
06-06-2003, 04:21 PM
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drum to disc- need help quick
aight, i think my drums need new shoes and i planned on doing a disc swap anyways. so i guess now would be a good time
alright i have a 92 rs with the drums and im planning on robbing out of a 90-92 z28
i was searching and reading and found that i need the disc brakes (of course) and a prop valve from it (or i could order one from gm if the car doesnt have it still)
anything else i need?
and also, i heard that the hubs on drums are larger and they need to be machined down so the discs can fit over them. this true? im trying to get it to be a complete bolt on or else im just sticking with drums i guess
edit: the reason i need help quick is the shoes are already gone i think (like worn) so im gonna be replacing them real real soon because the squeal from them is annoying as h***
alright i have a 92 rs with the drums and im planning on robbing out of a 90-92 z28
i was searching and reading and found that i need the disc brakes (of course) and a prop valve from it (or i could order one from gm if the car doesnt have it still)
anything else i need?
and also, i heard that the hubs on drums are larger and they need to be machined down so the discs can fit over them. this true? im trying to get it to be a complete bolt on or else im just sticking with drums i guess
edit: the reason i need help quick is the shoes are already gone i think (like worn) so im gonna be replacing them real real soon because the squeal from them is annoying as h***
06-07-2003, 12:42 PM
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Car: '88 Iroc, '91 RS, and a '70 RS
Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the ag
Transmission: A4, A4, slated to be a T56
You can get the new prop from GM if you know which you need but just pull the other one if you can.
You'll need 10 bolt disc backing plates, a full PBR brake system of calipers, carriers, rotors, pads, and new e-brake cables. You'll also need new hard axle brake lines unless you cut your own and bend them to fit. Just get new ones from Fine Lines or Inline Tube.
http://www.finelinesinc.com/
http://www.inlinetube.com/
Yes the axle flanges are larger for drum rearends. Buy or get rotors from a '93-'97 Camaro/ Firebird and they will fit right in, no machining necessary.
If you're in a hurry, just replace your shoes with the cheapest ones you can find and piece the new brakes together in the meantime. Then pick a day and do the swap. You're more likely to screw something up if you rush it. It's not hard IMO, but there is a lot to it and you need to do it right to be safe.
HTH....Ed
You'll need 10 bolt disc backing plates, a full PBR brake system of calipers, carriers, rotors, pads, and new e-brake cables. You'll also need new hard axle brake lines unless you cut your own and bend them to fit. Just get new ones from Fine Lines or Inline Tube.
http://www.finelinesinc.com/
http://www.inlinetube.com/
Yes the axle flanges are larger for drum rearends. Buy or get rotors from a '93-'97 Camaro/ Firebird and they will fit right in, no machining necessary.
If you're in a hurry, just replace your shoes with the cheapest ones you can find and piece the new brakes together in the meantime. Then pick a day and do the swap. You're more likely to screw something up if you rush it. It's not hard IMO, but there is a lot to it and you need to do it right to be safe.
HTH....Ed
06-08-2003, 09:05 AM
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Car: '88 Iroc, '91 RS, and a '70 RS
Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the ag
Transmission: A4, A4, slated to be a T56
One source:
http://www.tacreationsusa.com/suspensi.htm
$150 used, which is a good price. You can beat it if you get lucky, but that's pretty good for all those parts. However, you will need 3rd gen disc backing plates for these brakes to work. They're only $11 or so and all the other parts will bolt right on them and you'd be all set.
PM or e-mail me if you need to discuss this in further detail.
Ed
http://www.tacreationsusa.com/suspensi.htm
$150 used, which is a good price. You can beat it if you get lucky, but that's pretty good for all those parts. However, you will need 3rd gen disc backing plates for these brakes to work. They're only $11 or so and all the other parts will bolt right on them and you'd be all set.
PM or e-mail me if you need to discuss this in further detail.
Ed
06-09-2003, 10:23 AM
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Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
Another source for rear lines, http://www.classictube.com . You can get 'em in stainless- and you should!!! The worst is when you think you've broken the tube nut free, but it's really rusted to the tube. A few turns and SNAP you break the end of the tube off. I even bent/flared a replacement line, and when I had to remove the caliper, the damn tube nut rusted to the line again. So much for my careful bending job. 
Keep in mind the rear disc setup will be heavier then your rear drum setup... not only do you have the weight of the rotors, but also the weight of the calipers. That's not too cool for us v6 guys. I can lift up and move my drum brake rear with no problem, the disc brake rear is much heavier.
Keep in mind the rear disc setup will be heavier then your rear drum setup... not only do you have the weight of the rotors, but also the weight of the calipers. That's not too cool for us v6 guys. I can lift up and move my drum brake rear with no problem, the disc brake rear is much heavier.
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