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> Hydraulic Clutch Pedal, Is there a reason to keep the Pedal Spring?
Mowog4
post Jan 28 2018, 03:46 PM
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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
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Mowog4
post Jan 30 2018, 08:42 AM
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Any thoughts?
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billh1963
post Jan 30 2018, 08:54 AM
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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.
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dwillouby
post Jan 30 2018, 09:08 AM
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QUOTE(billh1963 @ Jan 30 2018, 07:54 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.


If I recall the return spring is required to assist the master cylinder to restore pedal position.
May have to take a look.
David
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Andyrew
post Jan 30 2018, 10:05 AM
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You need to fab a return spring, which is opposite the way the stock spring works. So yes, cut out the stock spring.

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andys
post Jan 30 2018, 10:22 AM
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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
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Mowog4
post Jan 30 2018, 11:01 AM
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QUOTE(andys @ Jan 30 2018, 09:22 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

Thanks, I really appreciate you finding the part number.
Ed
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Mowog4
post Jan 30 2018, 11:20 AM
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I do love this forum, thanks for the help
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burton73
post Jan 30 2018, 01:13 PM
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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
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ConeDodger
post Jan 30 2018, 01:21 PM
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QUOTE(billh1963 @ Jan 30 2018, 11:54 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.


My son’s 944 has a return spring. I know this because I just paid for a new one. (IMG:style_emoticons/default/blink.gif)

Oh, and yes it has a hydraulic clutch.
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dwillouby
post Jan 30 2018, 04:20 PM
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I left the stock spring in place.
Works perfect.

David
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Mowog4
post Jan 30 2018, 06:17 PM
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QUOTE(dwillouby @ Jan 30 2018, 03:20 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,
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dwillouby
post Jan 31 2018, 09:06 AM
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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 (IMG:style_emoticons/default/smile.gif) )

David
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76-914
post Jan 31 2018, 09:29 AM
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QUOTE(dwillouby @ Jan 31 2018, 07:06 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 (IMG:style_emoticons/default/smile.gif) )

David

(IMG:style_emoticons/default/agree.gif) 3 yr's & 11,000 miles later. (IMG:style_emoticons/default/beerchug.gif)
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Mowog4
post Jan 31 2018, 10:06 PM
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QUOTE(76-914 @ Jan 31 2018, 08:29 AM) *

QUOTE(dwillouby @ Jan 31 2018, 07:06 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 (IMG:style_emoticons/default/smile.gif) )

David

(IMG:style_emoticons/default/agree.gif) 3 yr's & 11,000 miles later. (IMG:style_emoticons/default/beerchug.gif)

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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