C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Trouble Shooting new install MC/Booster

Thread Tools
 
Search this Thread
 
Old Oct 14, 2019 | 10:47 AM
  #1  
Gumpy's Avatar
Gumpy
Thread Starter
Instructor
10 Year Member
 
Joined: May 2011
Posts: 169
Likes: 2
From: petaluma california
Default Trouble Shooting new install MC/Booster

Installing new kit ( Master-Booster) in my 68 cause had a close call this summer braking without brake booster,,,,,Installed a kit from Pirate in north carolina and the brakes lock up with expansion.....New brake light switch pushing down pedal a bit....which is a cylindrical looking thing like a spark plug,,,problem is i think pedal is not returning 100 percent,,,,,,I shortened the rod the best i could to give it some free-play...which is about 1/2 inch to an inch.....Thinking about taking it around 6-7 mile loop drive and taking BL switch off to see if the brakes start draging or lock up again..Any and all ideas will be appreciated....
Reply
Old Oct 14, 2019 | 02:10 PM
  #2  
MelWff's Avatar
MelWff
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2006
Posts: 18,771
Likes: 2,596
Default

You refer to two kits in your post. The first one I assume is the brake master and brake booster. You than refer to a "Kit" from Pirate.
What kit and who is Pirate? Is that the master and booster?
Was the master and booster adjusted for proper clearance between the booster rod and the master piston?
Reply
Old Oct 14, 2019 | 03:49 PM
  #3  
jackson's Avatar
jackson
Le Mans Master
 
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Default

https://piratejack.net/
Reply
Old Oct 14, 2019 | 07:02 PM
  #4  
MelWff's Avatar
MelWff
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2006
Posts: 18,771
Likes: 2,596
Default

So you provided the site but no link to what exactly you bought.
did you check the clearance i referred to in my prior post?
Reply
Old Oct 15, 2019 | 08:16 AM
  #5  
Dirty Dalton's Avatar
Dirty Dalton
Drifting
15 Year Member
 
Joined: Oct 2006
Posts: 1,875
Likes: 779
From: Persona Non Grata
2022 C3 of the Year Finalist - Unmodified
Default

Originally Posted by MelWff
....

Was the master and booster adjusted for proper clearance between the booster rod and the master piston?
!!!!!!!!
Reply
Old Oct 15, 2019 | 09:12 AM
  #6  
Sigforty's Avatar
Sigforty
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2001
Posts: 5,941
Likes: 281
From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
Default

Might have a broken spring in the pedal assembly. I am not really clear on what the problem is besides the pedal returning? Additionally, what did you adjust?
Reply
Old Oct 18, 2019 | 12:04 AM
  #7  
Gumpy's Avatar
Gumpy
Thread Starter
Instructor
10 Year Member
 
Joined: May 2011
Posts: 169
Likes: 2
From: petaluma california
Default

Thankyou for your help got tied up helping a friend move...thats correct pirate jack,,,turns out the m/c was for drum/disc only....to resolve my problem i adjusted out the rod (shortened) ....then added two flat washers between m/c and booster...adjusted up brake light switch and for now seems to be working properly..if i travel a long distance i will bring two more washers and proper wrench.....thanks
Reply
Old Oct 18, 2019 | 09:51 AM
  #8  
resdoggie's Avatar
resdoggie
Had a 1976 L-82, 4-sp
Supporting Lifetime
10 Year Member
Veteran: Navy
 
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
Default

Why not just buy the correct m/c and fix it properly?
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-1

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-2

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-3

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-4

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-5

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-6

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-7

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-8

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-9

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
Old Oct 18, 2019 | 03:01 PM
  #9  
MelWff's Avatar
MelWff
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2006
Posts: 18,771
Likes: 2,596
Default Master cylinder

Originally Posted by Gumpy
Thankyou for your help got tied up helping a friend move...thats correct pirate jack,,,turns out the m/c was for drum/disc only....to resolve my problem i adjusted out the rod (shortened) ....then added two flat washers between m/c and booster...adjusted up brake light switch and for now seems to be working properly..if i travel a long distance i will bring two more washers and proper wrench.....thanks
You cannt use a drum brake rear master on a 4 wheel disc brake car. The drum brake master has a residual pressure valve in the rear drum brake port that prevents fluid from fully returning when you release the pedal. Install the correct master before you either damage the rear rotors or have an accident because of rear wheel lockup.

https://www.freeasestudyguides.com/r...eck-valve.html
Reply

Get notified of new replies

To Trouble Shooting new install MC/Booster





All times are GMT -4. The time now is 11:19 PM.

story-0
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-1
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-2
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-3
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-4
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-5
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-6
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-7
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-8
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-9
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE