98~05 Blazer brake upgrade! DONE!

oldsmobile joe

Royal Smart Person
Nov 12, 2015
2,067
3,053
113
mpls
The only bad thing about using the stock disc/drum master cylinder is they usually have residual pressure valves in the outlet for the drum brakes. Using it for rear discs can make the calipers drag the pads as the Pistons won't go back as they should. Also, using the stock disc/drum proportioning valve will drastically restrict pressure to the rear; possibly to the point where the calipers will not or barely work. Disc systems typically run almost full pressure to the rear.
g-body brake systems DO NOT have residual pressure valves. not in the master, not in the combination valve, no where. let me state this again, there are no residual pressure valves in our cars.
 
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Reactions: 1 user

Geezy24

Apprentice
Nov 18, 2017
60
147
33
My z06 6 piston front and 4 piston caliper stop very well with a 1” bore wilwood mc and the vacuum setup for my 87 GN


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JAMCAR223

Royal Smart Person
Jun 6, 2014
1,853
5,507
113
Houston, TX.

JAMCAR223

Royal Smart Person
Jun 6, 2014
1,853
5,507
113
Houston, TX.

Doug Chahoy

Comic Book Super Hero
Nov 21, 2016
2,565
2,664
113
Other than the spindles, are all the other components of this swap from a 4 wheel drive.
 

TURNA

Rocket Powered Basset Hound
Jul 24, 2009
10,941
19,996
113
Socialist NY
no 2wd xtreme
 

Wesley84mc

Not-quite-so-new-guy
Nov 29, 2018
11
3
3
That quarter inch makes a huge difference. It not only adds surface area but the dual piston caliper doubles the spread on the pads. Ever stopped at a red light going 70 mph with stock brakes. So not only do I believe the 1/4 inch makes a difference I believe it makes all the difference. Good write up .
 

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