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#1
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Rear disc brake swap
Does anybody have any information on how to swap rear drum brakes with disc
brakes for 91 civic hb? Cons/pros? |
#2
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You won't see any better braking, only a "bling bling" factor.
You'll need master cylinder, prop. valve, ebrake cables, trailing arms complete to hub assembly, and different brake lines. Also figure on cutting out EACH bolt on the back. In short, not worth the effort. "Sean" > wrote in message ... > Does anybody have any information on how to swap rear drum brakes with disc > brakes for 91 civic hb? > Cons/pros? > > > |
#3
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Sean wrote:
> Does anybody have any information on how to swap rear drum brakes with disc > brakes for 91 civic hb? > Cons/pros? you need the right proportioning valve, hoses, backing plates/hub assemblies, hand brake cables and of course, disks & calipers. you also need a t50 torx driver. use a good quality one - NOT lisle. lisle make good tools for many applications, but their torx drivers are grossly inferior. i rounded off two before i finally figured out that it was the tool, not the backing plate bolt. a lot of people change out the whole trailing arm assemblies, but that's not essential, particularly if your trailing arm bushes are in good condition & the donor vehicle's aren't. leaving your old trailing arms in place also means you don't have to do a new rear end alignment. if you're going to do this, you may as well go for the big disks on the front as well, 10.25" vs 9.5" standard, and if you do that, you'll need bigger calipers, the bigger diameter master cylinder & the bigger vacuum booster. the steering knuckles are not necessary unless you're worried about the splash plate being slightly too small. unless your climate is absolutely abysmal, i really can't see it making any more difference than having spoked alloy wheels vs steelies. here's what i've worked out on proportioning valves. if anyone else knows different, please post. there's a number stamped into the one of the two main halves near where they're joined. if your original proportioning valve reads something like "3025" and you get rear disks from a vehicle reading "4040" [like an integra] and you /don't/ change the front disks, you need a "3040" proportioning valve [from an 88 accord ex/s]. if you do use the bigger front disks, you need the 4040. master cylinders are best changed complete with the vacuum booster as the bolt-on patterns are different depending on model/year. just so long as the brake lines align. the closest fit for my 89 civic, without doing any re-plumbing, is the 88 accord again. it has a 15/16" piston diameter. i'd prefer a 1" cylinder from a del sol or an integra, but that requires a different brake line fitting. not impossible, but it's not as close to being direct bolt-on as the rest of the conversion. some day, i'll get around to sending "how-to" pics to tegger for hosting. |
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