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Hot Rods Hydraulic clutch

Discussion in 'The Hokey Ass Message Board' started by Deere boy, Jul 14, 2021.

  1. Deere boy
    Joined: Jul 25, 2018
    Posts: 60

    Deere boy

    Getting the linkage to my clutch to work properly is just about an impossibility. Getting good alignment is extremely hard. I was thinking about getting a hydraulic clutch kit from Speedway or somewhere. The thing is the clutch disengages pretty hard. I consider myself an almost average strength male and I can't disengage it by pulling on the three inches or so of the "lever" that sticks out of the housing. Since it is the only standard shift vehicle I have on the place I don't have much to compare it to. Anyway, I guess my question is, will one of the 3/4 inch bore master and slave cylinders operate a tough disengaging clutch?
     
  2. 55willys
    Joined: Dec 7, 2012
    Posts: 1,661

    55willys
    Member

    That is normal to not be able to move the clutch fork with your hand. Your leg is much stronger and when you add the multiplication of the pedal ratio (probably 6:1) you have a huge mechanic advantage. A hydraulic clutch will work but you should buy the highest quality parts or you will hate yourself. I would much rather use mechanical linkage if at all possible. If you run Hydraulic NEVER use D.O.T. 5 brake fluid in it. You will be sure to have a failure if you do. Post a picture of the area you can't fit it in and we will see if we can help.
     
    racer-x and 2OLD2FAST like this.
  3. Dennis D
    Joined: May 2, 2009
    Posts: 757

    Dennis D
    Member

    If you are strong enough to disengage the clutch by pulling on the lever with just arm strength, please don't ever punch me!
     
  4. Deere boy
    Joined: Jul 25, 2018
    Posts: 60

    Deere boy

    Good to know that they all pull hard. I am going to make another effort to fabricate mechanical linkage.
     

  5. 2OLD2FAST
    Joined: Feb 3, 2010
    Posts: 3,431

    2OLD2FAST
    Member
    from illinois

    Pedal through the floor or hanging from the dash ?
     
  6. Dont know what chassis your working with ,but several guys here have done cable clutches using I believe subaru clutch cable.Theres some bracket fabing,but for under floor pedals its pretty straight forward.If this would work for you do a search here for posts that will have pictures included.
     
  7. neilswheels, RICH B, fauj and 9 others like this.
  8. iagsxr
    Joined: Aug 26, 2008
    Posts: 156

    iagsxr
    Member

    ^^^^ That's pretty slick.
     
    neilswheels, SlamIam and D-Russ like this.
  9. brianf31
    Joined: Aug 11, 2003
    Posts: 715

    brianf31
    Member

    Desoto291Hemi likes this.
  10. krylon32
    Joined: Jan 29, 2006
    Posts: 7,401

    krylon32
    Alliance Vendor
    from Nebraska

    I have used the Brizio cable on several customer chassis with good results.
     
    D-Russ likes this.
  11. Deere boy
    Joined: Jul 25, 2018
    Posts: 60

    Deere boy

    D-Russ likes this.
  12. dont go cheap on the parts. i prefer Mcloud products for the throw out bearing. they have alot of cool features to them. use a hydraulic cylinder from wilwood with the largest bore they make. this will move the most fluid for a good pedal feel. ussually around 1 7/8.
     
    Desoto291Hemi likes this.
  13. Deere boy
    Joined: Jul 25, 2018
    Posts: 60

    Deere boy

    Does it matter if the clutch cable is a little long? Ordered a standard Mustang cable and it could be a foot shorter, but since I have room for it, is that a problem? Seems like if it is extra long the bend can be smoother.
     
  14. I would think as long as it fits,and you have enough adjustment to suit your needs its all good.
     
  15. Doublepumper
    Joined: Jun 26, 2016
    Posts: 1,071

    Doublepumper
    Member

    If leaving the cable long, you may want to add a support or two, to anchor the center of the loop. Some support would help control flexing, that could alter cable adjustment/throw.
     
    D-Russ likes this.
  16. wandi harry
    Joined: Jul 19, 2008
    Posts: 261

    wandi harry
    Member

    What is the issue with dot5?
     
    2OLD2FAST likes this.
  17. I agree with this. Think about a bicycle shifter or brake cable – when they're not securely anchored, the housing moves some resulting in less travel in the cable. Also, the longer the cable, the more it can stretch.
     
  18. 55willys
    Joined: Dec 7, 2012
    Posts: 1,661

    55willys
    Member

    For some reason the hydraulic clutch release bearings that are inside the bell housing fail and leak in a very short time after using DOT 5 brake fluid. The external slave cylinders seem to be a bit more tolerant to it but also have shorter lives. I think it has to do with the rubber composition.
     
    D-Russ and wandi harry like this.
  19. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 7,854

    Bandit Billy
    ALLIANCE MEMBER

    They don't seem to like it.
    upload_2021-7-22_15-13-12.png
     
  20. hemihotrod66
    Joined: May 5, 2019
    Posts: 420

    hemihotrod66
    Member

    I use hi-temp Wilwood fluid in mine and they said it was fine...
     
  21. I run a hydraulic clutch in my Ford, 3/4" Wilwood master and Speedway 7/8" slave. I made up a steel plate for the firewall that locates the brake and clutch masters. The OG firewall had too much flex to it. I used the stock pedal location and a rod with heim ends.

    I had previously made it too complicated, took about 3 weekends to go back to the simplest configuration with it.
     

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