C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Camaro Master Cylinder

Thread Tools
 
Search this Thread
 
Old Nov 27, 2015 | 07:22 AM
  #1  
cshuman's Avatar
cshuman
Thread Starter
Pro
25 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Apr 2001
Posts: 744
Likes: 13
From: Lenoir City TN
Default Camaro Master Cylinder

I've seen some post on using a 4th generation MC on a C4. I've got a 91 that I installed Wilwoods front and rear and need to go to an MC with a larger bore. For those that have used this MC does it line up with the stock brake lines or is there some modification?


Or is there another unit that will do the same thing that will line up with the stock lines?
Reply
Old Nov 27, 2015 | 08:07 AM
  #2  
WVZR-1's Avatar
WVZR-1
Team Owner
20 Year Member
Veteran: Army
Active Streak: 30 Days
Liked
 
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
Default

Originally Posted by cshuman
I've seen some post on using a 4th generation MC on a C4. I've got a 91 that I installed Wilwoods front and rear and need to go to an MC with a larger bore. For those that have used this MC does it line up with the stock brake lines or is there some modification?


Or is there another unit that will do the same thing that will line up with the stock lines?
No the ports are different sizes and I believe the "spread" of the mounting to the booster is different also. The "spread" dimension difference I don't recall but the ports "best of recollection" C4 are frnt M10 X 1, rr M12 x 1 and the later F-body is frnt M12 x 1, rr M11 x 1.5 maybe. You would be gaining 1/8" piston diameter I believe.
Reply
Old Nov 27, 2015 | 08:22 AM
  #3  
cshuman's Avatar
cshuman
Thread Starter
Pro
25 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Apr 2001
Posts: 744
Likes: 13
From: Lenoir City TN
Default

Originally Posted by WVZR-1
No the ports are different sizes and I believe the "spread" of the mounting to the booster is different also. The "spread" dimension difference I don't recall but the ports "best of recollection" C4 are frnt M10 X 1, rr M12 x 1 and the later F-body is frnt M12 x 1, rr M11 x 1.5 maybe. You would be gaining 1/8" piston diameter I believe.
I saw another post for a unit that Napa has that some people have used. Does anyone know if it is a direct fit? See below

Myself and another forum member are using this MC with Wilwood
6 Piston GN caliper:
NAPA TRUSTOP 10-2684 Actual bore size is 1-1/16" but works like a charm.

Last edited by cshuman; Nov 27, 2015 at 08:24 AM.
Reply
Old Nov 27, 2015 | 08:47 AM
  #4  
WVZR-1's Avatar
WVZR-1
Team Owner
20 Year Member
Veteran: Army
Active Streak: 30 Days
Liked
 
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
Default

Originally Posted by cshuman
I saw another post for a unit that Napa has that some people have used. Does anyone know if it is a direct fit? See below

Myself and another forum member are using this MC with Wilwood
6 Piston GN caliper:
NAPA TRUSTOP 10-2684 Actual bore size is 1-1/16" but works like a charm.
That's 1 1/4, 1/2-20 & 9/16-18 ports for a later GM truck with hydro-boost I believe.

Last edited by WVZR-1; Nov 27, 2015 at 08:50 AM.
Reply
Old Nov 29, 2015 | 01:23 PM
  #5  
cshuman's Avatar
cshuman
Thread Starter
Pro
25 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Apr 2001
Posts: 744
Likes: 13
From: Lenoir City TN
Default

Originally Posted by WVZR-1
That's 1 1/4, 1/2-20 & 9/16-18 ports for a later GM truck with hydro-boost I believe.
if you would please explain the numbers above.

Thanks
Reply
Old Nov 29, 2015 | 04:02 PM
  #6  
WVZR-1's Avatar
WVZR-1
Team Owner
20 Year Member
Veteran: Army
Active Streak: 30 Days
Liked
 
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
Default

Originally Posted by cshuman
if you would please explain the numbers above.

Thanks
1 1/4 - piston, 1/2-20 threads front port and 9/16-18 threads rear port. The mounting to the booster would be different also.
Reply
Old Nov 29, 2015 | 04:52 PM
  #7  
cshuman's Avatar
cshuman
Thread Starter
Pro
25 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Apr 2001
Posts: 744
Likes: 13
From: Lenoir City TN
Default

Originally Posted by WVZR-1
1 1/4 - piston, 1/2-20 threads front port and 9/16-18 threads rear port. The mounting to the booster would be different also.
So they must of made adapters for the lines and also modified the booster mounting to use this MC.
Reply
Old Dec 2, 2015 | 08:20 AM
  #8  
-=Jeff=-'s Avatar
-=Jeff=-
Race Director
25 Year Member
All Eyes On Me
Photogenic
Community Favorite
 
Joined: Mar 1999
Posts: 12,597
Likes: 237
From: Bartlett Illinois
Default

in 92+ GM went to a slightly larger bore Master cylinder in the Corvette than your 91. That is a direct bolt in. I actually have one for my 90 (from a 94 I think) I am going to use.

Also the Brake pedal pivot point changed too (I think in 92) you could replace the mount and pedal as well if you are really motivated.. I have 6 piston Wilwoods on the front of my car, I think stepping up to the 94 Master will be all I need

EDIT:

for the 4th Gen f-body cylinder, you will need different fittings for the brake lines at the master, also you will need a 3/16" spacer on the mount as well. I had the 4th gen f-body on my 89 corvette, worked well

Last edited by -=Jeff=-; Dec 2, 2015 at 08:22 AM.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Dec 6, 2015 | 07:42 PM
  #9  
cshuman's Avatar
cshuman
Thread Starter
Pro
25 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Apr 2001
Posts: 744
Likes: 13
From: Lenoir City TN
Default

Originally Posted by -=Jeff=-
in 92+ GM went to a slightly larger bore Master cylinder in the Corvette than your 91. That is a direct bolt in. I actually have one for my 90 (from a 94 I think) I am going to use.

Also the Brake pedal pivot point changed too (I think in 92) you could replace the mount and pedal as well if you are really motivated.. I have 6 piston Wilwoods on the front of my car, I think stepping up to the 94 Master will be all I need

EDIT:

for the 4th Gen f-body cylinder, you will need different fittings for the brake lines at the master, also you will need a 3/16" spacer on the mount as well. I had the 4th gen f-body on my 89 corvette, worked well
Thanks Jeff, it looks like 7/8" bore for 91 and 15/16" for 92 up.
Reply

Get notified of new replies

To Camaro Master Cylinder





All times are GMT -4. The time now is 06:33 PM.

story-0
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-1
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-2
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-3
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
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE