1LE Front and WS6 Rear Brakes with Manual Master Cylinder?

Discussion in 'Suspension, Steering, Brake & Wheel Topics' started by Jon Randolph, Jul 25, 2018.

  1. Jon Randolph

    Jon Randolph Member

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    I just purchased a master cylinder from PTFB and am curious to see if anyone has tried running manual brakes with the 1LE front setup? Anyone try running manual? How do you like it? Any tips?

    I also just bought a pair of '79-'81 disc brake WS6 backing plates this week.
     
  2. dale68z

    dale68z Veteran Member

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    manual master cylinder is a 1" bore, so your pedal travel will be longer than a larger power brake 1 1/8 master. Your manual master will build more pressure with less foot pressure, though.
    Should work well.
     
  3. Jon Randolph

    Jon Randolph Member

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    I just spoke with Dave from Pro-Touring F-Body again yesterday about a cheap option for the rear WS6 backing plates. The Wilwood setup he sells looks awesome but for my current budget, he said I could put on G-Body calipers real cheap.

    From what I can tell, this would eliminate the problematic ratcheting parking brake.
     
  4. Skip Fix

    Skip Fix Veteran Member

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    GM "metric" D154 calipers are bolt ons. You do have to mess with the flex hose bolt on some as it is different than the WS6 ratchet caliper. I did that on the Camaro/IA project. DSC_0189.JPG DSC_0190.JPG DSC_0187.JPG
     
  5. 1973typeLT

    1973typeLT Member

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    I did it the 1le swap and did a c3 vette manual mc and it works great. I don't have the ws6 rear though.
     
  6. 79T/Aman

    79T/Aman Veteran Member NastyZ28 Sponsor NastyZ28 Sponsor Lifetime Gold Member

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    G-Body calipers also referred to as GM-D154 or "metric" calipers.
     
  7. dailycruiser81

    dailycruiser81 Veteran Member

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    Be careful. I ordered the part number He gave me because He was out of red at the time from another vendor. Long story short they don't fit. They only except .81 thick rotor and the trans am rear you can only get. 9
     
  8. dailycruiser81

    dailycruiser81 Veteran Member

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    What application are these for when you order?
     
  9. Skip Fix

    Skip Fix Veteran Member

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    Late 70s early 80s Malibu. Right side.
     
  10. Jon Randolph

    Jon Randolph Member

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    Where did you get your numbers from?
    This is a selection I got from Rock Auto...

    Front rotor for 80's G-Body, S-10, F-Body, etc. ​

    Discard Thickness (IN) 0.96
    Nominal Thickness (in) 1.04 ​

    79-81 Firebird WS6 Rear Rotor...

    Discard Thickness (IN) 0.91
    Nominal Thickness (in) 0.97​
     

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