Club Cobra Keith Craft Racing  

Go Back   Club Cobra > Manufacturers, Engine Builders, tools, and parts. > Classic Roadsters II

Welcome to Club Cobra!  The World's largest non biased Shelby Cobra related site!

  •  » Representation from nearly all Cobra/Daytona/GT40 manufacturers
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and nearly 1 million posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

MMG Superformance
Nevada Classics
Keith Craft Racing
Main Menu
Module Jump:
Nevada Classics
Nevada Classics
MMG Superformance
Advertise at CC
Banner Ad Rates
MMG Superformance
Planet Cobra
MMG Superformance
Keith Craft Racing
December 2018
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31          
  #1 (permalink)  
Old 03-10-2018, 03:17 PM
CC Member
Visit my Photo Gallery

Join Date: Oct 2015
Cobra Make, Engine: Classic Roadsters Chevy 350
Posts: 71
Not Ranked     
Default 87 Corvette brake master question

Hello all,

As I continue to replace items on my CR in preparation for a hopeful trip to Power Tour this year, I have come to the point where my brake master needs replaced. I have read that the newest recommended set up is to use a 1987 Corvette 4 wheel disc master even when using drums in the rear. I have seen versions with a single reservoir with extension that connects to the front of the cylinder (Centric 13062063) and versions with 2 individual reservoirs (CARDONE 134001). Is there a preference on which to use? My instinct would be to use the one with 2 reservoirs. Also, I read that DV suggested getting a Jegs or similar proportioning valve for the rear brakes, is the idea here to ditch the existing proportioning valve and only adjust the rear feed? Currently using the 9'' front rotors and drums out back, but intend on upgrading to 11'' fronts and possibly go to sn95 rear discs.
Reply With Quote
Sponsored Links
Sponsored Links
  #2 (permalink)  
Old 03-12-2018, 04:21 PM
CC Member
Visit my Photo Gallery

Join Date: Jul 2015
Cobra Make, Engine: 1992 Classic Roadsters, 427 Dart Stroker, Tremec 5spd, 8.8 positrac differential
Posts: 15
Not Ranked     
Default Corvette master cylinder

Just went thru this on my cr roadster, don't waste your time with the Vette mc. I have 4 wheel disc and results were the same with disc/ drum. I converted to manual due to vacuum issues. After I changed the brake pedal ratio and went manual I couldn't get enough brake pressure to lock tires up in emergency. The best ratio I could achieve with stock brake pedal arm was 5:1 after relocating pivot point on pedal assembly. Tried the Vette cylinder, no change whatsoever. Tried adjustable prop valve still no change. Finally realized due to pedal ratio needed smaller bore master cylinder 7/8 bore from wilwood did the trick. It made a massive difference part #260-12900 for those interested.
Reply With Quote
  #3 (permalink)  
Old 03-12-2018, 04:40 PM
MaSnaka's Avatar
CC Member
Visit my Photo Gallery

Join Date: Feb 2006
Location: Thousand Oaks, CA
Cobra Make, Engine: Classic Roadster
Posts: 1,232
Not Ranked     

I switched the 9" pinto brakes for the Wilwood Dynalite 11" discs. Dropped around 30lbs from each wheel. Better braking for sure. Then I put 11" discs on the rear with a wildwood adjustable proportioning valve. I changed the MC to accommodate the rear discs...need a bigger reservoir for those. I used Classic Performance Products 15/16" bore master. No booster. It works well but I did change the pedal ratio for manual too because it was set up for booster pedal ratio. Pics in my gallery.
Reply With Quote

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
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -7. The time now is 02:48 PM.

Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting For full policy documentation refer to the following link: CC Policy
Links monetized by VigLink