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914World.com _ 914World Garage _ Hydraulic Clutch Pedal
Posted by: Mowog4 Jan 28 2018, 03:46 PM
I am using one of the available brackets with a Honda MC on a Subi conversion. Is the spring on the clutch pedal still used? Seems like it would b eliminated.
Thanks
Posted by: Mowog4 Jan 30 2018, 08:42 AM
Any thoughts?
Posted by: billh1963 Jan 30 2018, 08:54 AM
Aren't pedal return springs used on all pedals...mechanical linkage or hydraulic?
I know the Porsche 996 (with hydraulic clutch) uses a spring. I think pretty much every car does.
Then again, I don't claim to be an expert.
Posted by: dwillouby Jan 30 2018, 09:08 AM
Aren't pedal return springs used on all pedals...mechanical linkage or hydraulic?
I know the Porsche 996 (with hydraulic clutch) uses a spring. I think pretty much every car does.
Then again, I don't claim to be an expert.
If I recall the return spring is required to assist the master cylinder to restore pedal position.
May have to take a look.
David
Posted by: Andyrew Jan 30 2018, 10:05 AM
You need to fab a return spring, which is opposite the way the stock spring works. So yes, cut out the stock spring.
Posted by: andys Jan 30 2018, 10:22 AM
On my hydraulic clutch setup, I replaced the existing spiral wound spring with one that is wound in the opposite direction so as to function as a return spring. I used a McMaster-Carr spiral spring, and modified the ends to re-create the hooks. I used a small butane torch to anneal the ends in order to make them easier to form. I don't have the McMaster-Carr part number at the office; will have to wait till I get home and dig it up.
Andys
Posted by: Mowog4 Jan 30 2018, 11:01 AM
On my hydraulic clutch setup, I replaced the existing spiral wound spring with one that is wound in the opposite direction so as to function as a return spring. I used a McMaster-Carr spiral spring, and modified the ends to re-create the hooks. I used a small butane torch to anneal the ends in order to make them easier to form. I don't have the McMaster-Carr part number at the office; will have to wait till I get home and dig it up.
Andys
Thanks, I really appreciate you finding the part number.
Ed
Posted by: Mowog4 Jan 30 2018, 11:20 AM
I do love this forum, thanks for the help
Posted by: burton73 Jan 30 2018, 01:13 PM
So I am using Tilton pedals for my brake and clutch. I had not thought of putting in any springs till I saw this. 2 masters for the brakes and one for the clutch.
What have my brothers that are running a race set up like this done? What to do for a brake light switch?
Thanks as always for all the info. It make it so much easer that in the old days.
Bob B
Posted by: ConeDodger Jan 30 2018, 01:21 PM
Aren't pedal return springs used on all pedals...mechanical linkage or hydraulic?
I know the Porsche 996 (with hydraulic clutch) uses a spring. I think pretty much every car does.
Then again, I don't claim to be an expert.
My son’s 944 has a return spring. I know this because I just paid for a new one.
Oh, and yes it has a hydraulic clutch.
Posted by: dwillouby Jan 30 2018, 04:20 PM
I left the stock spring in place.
Works perfect.
David
Posted by: Mowog4 Jan 30 2018, 06:17 PM
I left the stock spring in place.
Works perfect.
David
My concern is the stock spring pulls the pedal towards the floor, fine for cable actuated but the opposite of what I want in a Hydraulic,
Posted by: dwillouby Jan 31 2018, 09:06 AM
What the spring does is take the slack out of the system. Puts a preload on the cable / master cyl. Does not exert enough pressure against a properly bled Wilwood m/c to cause an issue.
That's my opinion, have been wrong before. ( but I have stayed in a Holiday Inn many times 
)
David
Posted by: 76-914 Jan 31 2018, 09:29 AM
What the spring does is take the slack out of the system. Puts a preload on the cable / master cyl. Does not exert enough pressure against a properly bled Wilwood m/c to cause an issue.
That's my opinion, have been wrong before. ( but I have stayed in a Holiday Inn many times
)David
3 yr's & 11,000 miles later. 
Posted by: Mowog4 Jan 31 2018, 10:06 PM
What the spring does is take the slack out of the system. Puts a preload on the cable / master cyl. Does not exert enough pressure against a properly bled Wilwood m/c to cause an issue.
That's my opinion, have been wrong before. ( but I have stayed in a Holiday Inn many times
)David
3 yr's & 11,000 miles later. Who am I to argue with the wisdom of the Holiday Inn, it will go in with the stock spring. Thanks for the help.
Ed
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