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 > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-27-2005, 08:47 AM   #1
fade94
Registered User
 
fade94's Avatar
 
Join Date: Mar 2005
Location: Melissa, TX
Posts: 799
Question Testing vacuum booster?

Is there a way to test one without mounting it on the truck? Could you just put vacuum to it and see if there is a difference in force to move the rod? I have one that I want to put on my 71 but I want to see if it works before I go thru the trouble of mounting it.
ALSO, I have been researching prices on new ones. They show one for Bendix brakes and another for Delco. How can I tell which one I need since it did not originally have one?
__________________
68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates)
67 short step project (will get SWB from the 68)
67 Camaro, #'s matching (my wife's)
03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear

Last edited by fade94; 07-27-2005 at 10:56 AM. Reason: Add info
fade94 is offline   Reply With Quote
Old 07-27-2005, 10:52 AM   #2
70GMCer
Senior Member
 
70GMCer's Avatar
 
Join Date: Apr 2005
Location: Joppa, Maryland
Posts: 4,408
I'l like to know that also. I'm going to be doing the same install.....
__________________
1997 GMC Sierra Ext

1965 Mustang
70GMCer is offline   Reply With Quote
Old 07-28-2005, 12:17 AM   #3
rage'nrat638
Account Suspended
 
rage'nrat638's Avatar
 
Join Date: Mar 2003
Location: ** THE FALL GUY **CHICAGO IL
Posts: 5,883
pull a vacuum on on it and see if it holds
rage'nrat638 is offline   Reply With Quote
Old 07-28-2005, 06:54 AM   #4
bobs409
1969 Custom 30 wrecker
 
bobs409's Avatar
 
Join Date: Sep 2001
Location: Pottsville, Pa
Posts: 2,611
I tested one like this. I just used one of my cars that have power brakes and pluged the check valve into the test booster. Start car and test by pushing the brake rod in to simulate putting the brakes on. If it goes in easily, it's working. I also tested it by shutting off the car and waiting about 1 minute. Then pull check valve. If there is still vacuum, you've got a good one.

Bob
__________________
Bob

63 Impala 283/PG/3.36 (under restoration)
66 Impala 327/PG/3.36
66 Chevelle SS 409/M22/3.55
69 Chevelle 307/PG/3.08 (future restoration)
69 C10 short stepside 454/TH350/3.73
69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!)
71 Cheyenne 20 fleetside 350/4 spd/4.10
71 Chevelle 6/PG/3.08
72 Chevelle 454/M21/4.10
bobs409 is offline   Reply With Quote
Reply

Bookmarks


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 08:45 AM.


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