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Six wheel discs, 1,600 psi brake pressure front and rear [message #311198]

Fri, 02 December 2016 19:52

wally

Messages: 643
Registered: August 2004
Location: Omaha Nebraska

Karma: 5

Senior Member

With Bob Stone's hydroboost kit using a 40mm master cylinder we were able to get 1,400 psi brake pressure. The limiting factor seemed to be available pressure from the steering pump. PSC sells a new Saginaw style pump made by Delphi that is supposed to output 1,650 psi. The PSC pump I installed did not quite do that until the relief part of the flow valve got tweaked. After that we were able to get 1,600 psi brake pressure with Sue on the pedal.
We have Manny's reaction arms on the rear and were not able to drag any tire on concrete at 1,400 psi so more pressure should be more brake. Calipers are 80mm front and mid with 66mm Kelsey Hayes park brake on the rear.
http:// www.pscmotorsports.com/motorsport-specific-products/offroad/power-steering-pumps-kits-components/gm-chevy/80-newer-hi-performance-power-steering-pump- w-o-can.html
http://www.gmcmhphotos.com/photos/power-level-valve-fitting/p61812-rear-brake-pressure.html
http://www.gmcmhphotos.com/photos/power-level-valve-fitting/p61813-front-brake-pressure.html
https://youtu.be/1BZdAva7wqc
https://youtu.be/x7_mwmyEDaY

Wally Anderson
Omaha NE
75 Glenbrook

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Re: Six wheel discs, 1,600 psi brake pressure front and rear [message #311209 is a reply to message #311198]

Sat, 03 December 2016 10:53

Hal StClair

Messages: 971
Registered: March 2013
Location: Rio Rancho NM

Karma: -12

Senior Member

I wonder how our steering boxes will like the increased pressure. It's pretty simple to up the flow and pressure on our pumps merely adding or removing shims and increasing orifice sizes. I just don't know if the seals would live under 1650 lbs of fluid. It'll be curious to see.
Hal

"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane." 1977 Royale 101348, 1977 Royale 101586, Diesel powered, 1974 Eagle Bus 45',w/slideout, Rio Rancho, NM

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