rear disc conversion 1989 Bonnie - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-16-2008, 11:06 PM   #1
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Default rear disc conversion 1989 Bonnie

i was looking to do a rear brake conversion over to disc....anybody thioght of this yet? im trying to match up posssibly T A ? Firebird.... thanks stev
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Old 04-17-2008, 12:38 PM   #2
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I'm not aware of anyone who has done it. What are you trying to accomplish. The rear shoes on our cars outlast the disc 2 to 1.
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Old 05-10-2009, 01:34 AM   #3
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These cars stop really well too. Rear disc drag all the time and will wear sooner.
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Old 12-26-2010, 04:44 PM   #4
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I'm completing this build now on my 91. I got Wilwood Combination Parking brake calipers, manufactured my own brackets and also have two piece Wilwood rotors. It was a heck of a project, but it looks fantastic and will allow the car to have a sleaker look and much better stopping. I'm working on an L67 conversion with a massive power output....need all the stopping power I can get! I've also beefed up the suspension with Moog chasis parts and an Addco 429 sway bar in the rear to keep it planted.

Keep in mind that you will have to address the master cylinder, booster and a proportioning valve too to maintain the proper braking force. It'* a lot of trial and error, but is one sweet customization!
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