The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > Info Center > FAQ Truck Tech > 67-72

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-16-2017, 02:50 PM   #1
gmc4x4can
Registered User
 
gmc4x4can's Avatar
 
Join Date: Jan 2017
Location: Kamloops/ Victoria BC
Posts: 19
Are all proportioning valves the same?

I'm in the process of swapping my 70 k10 to front discs. I've got most of what I need. I've ordered a 72 M/C for front discs from napa but they don't sell proportioning valves. I've seen them hanging on the wall at the other parts store but they not 72 specific. Would it work for me though?
gmc4x4can is offline   Reply With Quote
Old 03-16-2017, 10:03 PM   #2
Keith Seymore
Registered User
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 9,136
Re: Are all proportioning valves the same?

Quote:
Originally Posted by gmc4x4can View Post
I'm in the process of swapping my 70 k10 to front discs. I've got most of what I need. I've ordered a 72 M/C for front discs from napa but they don't sell proportioning valves. I've seen them hanging on the wall at the other parts store but they not 72 specific. Would it work for me though?
Not necessarily.

Proportioning valves are characterized by meter, split and slope. Meter is how long the front discs are held off so the rear drums can apply, split is the point at which the front pressure and the rear line pressure deviate, and the slope is the relationship of the front pressure versus the rear pressure after the split .

The OEs spend a lot of time tuning these for the specific configuration based on series, wheel base, GVW, brake system and CG location.

You'll probably want to find one that was made for your truck (or is known to work on a similar configuration) .

K
__________________
Chevrolet Flint Assembly
1979-1986
GM Full Size Truck Engineering
1986 - 2019
Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926
My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524
Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/
Keith Seymore is online now   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:57 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com