Club Cobra Keith Craft Motorsports  

Go Back   Club Cobra > Cobra Talk Areas > ALL COBRA TALK

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

Nevada Classics
MMG Superformance
Main Menu
Module Jump:
Nevada Classics
Nevada Classics
MMG Superformance
Planet Cobra
Advertise at CC
Banner Ad Rates
MMG Superformance
Keith Craft Racing
Keith Craft Racing
October 2019
S M T W T F S
    1 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    

Kirkham Motorsports

Like Tree5Likes

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 06-20-2019, 10:23 PM
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2018
Location: Lodi, CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 375
Not Ranked     
Default Backdraft slave cylinder

I am looking for some advice ,on a new slave cylinder for my clutch.I have replaced two in less than one thousand miles on my car .They are doorman brand for a mazda b2600.I have a 2012 with a 351 windsor quicktime bellhousing and a tko600 transmission I am looking for a external type. I found a speedway for 65$ and was not sure if it would work. Please help with correct parts that work thank you.
Reply With Quote
Sponsored Links
Sponsored Links
  #2 (permalink)  
Old 06-21-2019, 05:46 AM
spdbrake's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2015
Location: DFW, TX
Cobra Make, Engine: BDR #53, 408W
Posts: 685
Not Ranked     
Default

I've only had to change one on mine but the car had been sitting 13 years before I purchased it. Dorman CS103489
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

If you've gone thru two for shaft seals, I'd suspect its an alignment issue.
Take the removed slave apart by blowing the piston out with compressed air. Take note of the wear pattern on the piston and barrel clock angles in the bore.
It will help you determine which way to move or shim the Next Slave cylinder to lessen side loads (which usually cause premature failure).
The Slave Cyl/Mount kit sold by Iconic may help you.
https://www.iconicparts.com/clutch-slave-assembly.html

DOT 3 fluid btw.
pgermond and hauss like this.
Reply With Quote
  #3 (permalink)  
Old 06-21-2019, 09:15 AM
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2018
Location: Lodi, CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 375
Neutral     
Default

Yep that is the one I purchased. I will try it again using your suggestions . Thank you sir.
Reply With Quote
  #4 (permalink)  
Old 06-21-2019, 03:42 PM
Senile Club Cobra Member
Visit my Photo Gallery

 
Join Date: Feb 2001
Location: Buffalo, NY USA, NY
Cobra Make, Engine: Time Machines Motorsports LLC- Superformance Dealer
Posts: 4,068
Not Ranked     
Default

Alignment is very important. We like a rod end rather than a rounded bolt as it allows misalignment without pressure.

https://www.facebook.com/TimeMachine...type=3&theater

https://www.facebook.com/TimeMachine...type=3&theater

This design allows adjustment in both planes with spacers/bushings.
__________________
"I'm high all right, but on the real thing....powerful gasoline and a clean windshield..."

http://www.timemachinesauto.com/

Last edited by Mark IV; 06-21-2019 at 03:43 PM.. Reason: corrected
Reply With Quote
  #5 (permalink)  
Old 06-21-2019, 08:41 PM
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2018
Location: Lodi, CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 375
Not Ranked     
Default

Quote:
Originally Posted by Mark IV View Post
Alignment is very important. We like a rod end rather than a rounded bolt as it allows misalignment without pressure.

https://www.facebook.com/TimeMachine...type=3&theater

https://www.facebook.com/TimeMachine...type=3&theater

This design allows adjustment in both planes with spacers/bushings.
wanted to keep stock clutch arm yours looks very nice but would require a lot of work time and $$
Reply With Quote
  #6 (permalink)  
Old 06-21-2019, 10:33 PM
Gaz64's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: May 2008
Location: Brisbane, QLD
Cobra Make, Engine:
Posts: 2,254
Not Ranked     
Default

You need the pushrod to be straight when the clutch is fully depressed, so less spacer thickness with clutch released.
The most pressure on the piston bore occurs at full travel, especially with a short pushrod.

Gary
Reply With Quote
  #7 (permalink)  
Old 06-22-2019, 02:46 AM
Senile Club Cobra Member
Visit my Photo Gallery

 
Join Date: Feb 2001
Location: Buffalo, NY USA, NY
Cobra Make, Engine: Time Machines Motorsports LLC- Superformance Dealer
Posts: 4,068
Not Ranked     
Default

Quote:
Originally Posted by hauss View Post
wanted to keep stock clutch arm yours looks very nice but would require a lot of work time and $$
It does require the arm to "off" the car but the bracket on the arm is a simple fabricated piece welded to the the arm and we thread the pushrod to take a female rod end with a jam nut. Total cost of parts is less than $20.00 including the spacers to center/align the slave to the arm.
__________________
"I'm high all right, but on the real thing....powerful gasoline and a clean windshield..."

http://www.timemachinesauto.com/
Reply With Quote
  #8 (permalink)  
Old 06-22-2019, 09:46 AM
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2018
Location: Lodi, CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 375
Not Ranked     
Default

Time and labor > $$ to me . I hear what others are saying about proper setup . I think it is just a bad part witch sucks air in the bleed screw so I am looking for a better quality part just need a little help finding one.
Reply With Quote
  #9 (permalink)  
Old 06-22-2019, 11:50 AM
spdbrake's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2015
Location: DFW, TX
Cobra Make, Engine: BDR #53, 408W
Posts: 685
Not Ranked     
Default

The bleed nipple won't suck air in. There is no check valve in it. It seals at the conical taper at the base, not allowing to fluid squirt out when the the pedal is depressed.
It can only Suck Air if: You release the pedal while bleeding before the person under the car tightens the bleed nipple.

The Speedway Slave will probably work. I'd try and stick with the same Bore diameter you currently have so there no chance of running out of stroke travel.

If you choose a larger dia slave the the stroke at the clutch will be less and then you may have to up the dia of the master to get the clutch to fully disengage when the pedal is depressed.
Reply With Quote
  #10 (permalink)  
Old 06-22-2019, 11:02 PM
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2018
Location: Lodi, CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 375
Not Ranked     
Default

Quote:
Originally Posted by spdbrake View Post
The bleed nipple won't suck air in. There is no check valve in it. It seals at the conical taper at the base, not allowing to fluid squirt out when the the pedal is depressed.
It can only Suck Air if: You release the pedal while bleeding before the person under the car tightens the bleed nipple.

The Speedway Slave will probably work. I'd try and stick with the same Bore diameter you currently have so there no chance of running out of stroke travel.

If you choose a larger dia slave the the stroke at the clutch will be less and then you may have to up the dia of the master to get the clutch to fully disengage when the pedal is depressed.
I understand what you are saying, but a improperly machined hole, will let air into the system. I disassembled my slave and was unable to see any wear on the piston. Not sure of bore diameter but has a adjustable pin on the speedway witch I like. Do you think master cylinder could be allowing air into the system?
Reply With Quote
  #11 (permalink)  
Old 06-22-2019, 11:43 PM
Gaz64's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: May 2008
Location: Brisbane, QLD
Cobra Make, Engine:
Posts: 2,254
Not Ranked     
Default

Quote:
Originally Posted by hauss View Post
I understand what you are saying, but a improperly machined hole, will let air into the system. I disassembled my slave and was unable to see any wear on the piston. Not sure of bore diameter but has a adjustable pin on the speedway witch I like. Do you think master cylinder could be allowing air into the system?
That's mechanically impossible, if it could suck air in, it will definitely leak fluid under pressure.

Master cylinders can suck air, depending on type/configuration.

Gary
Reply With Quote
  #12 (permalink)  
Old 06-24-2019, 10:09 PM
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2018
Location: Lodi, CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 375
Not Ranked     
Default

I bench bleed the new slave cylinder then replaced the old one.I removed the hydraulic line and while it was dripping installed the new cylinder. I refilled the master cylinder with dot#4 cleaned all the brake fluid and now the clutch works as it should .I do not know why I was unable to bleed the normal way .I just hope that this will help anyone else who may be having trouble with their clutch.
Reply With Quote
  #13 (permalink)  
Old 06-24-2019, 10:41 PM
Gaz64's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: May 2008
Location: Brisbane, QLD
Cobra Make, Engine:
Posts: 2,254
Not Ranked     
Default

Does the slave cylinder bleed screw face up or down?
Reply With Quote
  #14 (permalink)  
Old 06-26-2019, 08:07 AM
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2018
Location: Lodi, CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 375
Not Ranked     
Default

The bleed screw is up but the fill line in even higher up. Replaced flex hose today but this time it only worked for 10 miles . may have air trapped in flex line so I will rebleed
Reply With Quote
  #15 (permalink)  
Old 06-26-2019, 10:19 AM
spdbrake's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2015
Location: DFW, TX
Cobra Make, Engine: BDR #53, 408W
Posts: 685
Not Ranked     
Default

I replaced the factory master cyl with a Wilwood 3/4" remote unit, abandoned the factory hard line running next to the exhaust collector and used a 48" -4 flex line running over the footbox.

Shopping list if you need it.
2 each Russell RUS-640301 BRAKE FITTING (1 at master, 1 at slave)
https://www.summitracing.com/tx/part...0301/overview/
1 each Allstar Performance ALL46402-48 hose
https://www.summitracing.com/tx/parts/aaf-all46402-48
1 each Wilwood 260-3374 master
https://www.summitracing.com/tx/parts/wil-260-3374
2 each Eaton Weatherhead C5506X4 swivel (at the master and slave)
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
1 each Fragola 499162-BL swivel (cut the nipple off the remote resv base and tapped in, makes a for cleaner routing to the master)
https://www.summitracing.com/tx/parts/fra-499162-bl
Summit's photo is messed up, Shows a 1/4" NPT when the fitting actually 1/8" NPT
Thermo sleeve on all fuel hoses and brake lines https://www.jegs.com/i/Thermo-Tec/893/14011/10002/-1


hauss likes this.

Last edited by spdbrake; 06-26-2019 at 10:28 AM..
Reply With Quote
  #16 (permalink)  
Old 06-26-2019, 10:37 AM
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2018
Location: Lodi, CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 375
Not Ranked     
Default

Turns out the master cylinder was leaking ordered new from amazon . Going to have fun getting to the fitting not sure yet of the best way to get at it. Never saw the leak because it was leaking behind the carpet.
Reply With Quote
  #17 (permalink)  
Old 06-27-2019, 12:20 AM
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2018
Location: Lodi, CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 375
Not Ranked     
Exclamation Clutch master cylinder

Dam near impossible, to remove the clutch master cylinder had to crawl across the car from opposite side, lay across motor and reach inside of fender and around brake booster .Working blind, just feeling around by hand.Not a job for old men. Finally got it out, but what a chore! Not looking forward, to replacing with the new one. Looking back on it, I should have rebuilt it in the car . I think that would have been a lot easier.
ront49 likes this.
Reply With Quote
  #18 (permalink)  
Old 06-27-2019, 03:53 AM
Cashburn's Avatar
Backdraft Racing Dealer
Visit my Photo Gallery
Lifetime Contributor
 
Join Date: Dec 2004
Location: North Haven, CT
Cobra Make, Engine: Backdraft Racing
Posts: 4,986
Not Ranked     
Default

Removing the fender gill makes life much easier
hauss likes this.
__________________
IT'S NOT REAL. IT'S UNREAL.
VINTAGE MOTORSPORTS
888.427.1965 | www.vintagemotorsports.com
Reply With Quote
  #19 (permalink)  
Old 06-27-2019, 10:21 AM
CC Member
Visit my Photo Gallery

 
Join Date: May 2015
Location: Downers Grove, IL
Cobra Make, Engine: Backdraft SBF-302
Posts: 280
Not Ranked     
Default

^^
this
Reply With Quote
  #20 (permalink)  
Old 06-27-2019, 12:33 PM
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2018
Location: Lodi, CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 375
Not Ranked     
Default

Quote:
Originally Posted by Cashburn View Post
Removing the fender gill makes life much easier
Now you tell me. Good thing I am still waiting on the new one.I will do this on the install
Reply With Quote
Reply

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 04:07 PM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com 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 clubcobra.com 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. clubcobra.com 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 clubcobra.com. For full policy documentation refer to the following link: CC Policy
Links monetized by VigLink