MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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Brownwood
Keith Montague

(176 posts)

Registered:
01/25/2014 08:08PM

Main British Car:


Ford 5.0 and T5 clutch actuation
Posted by: Brownwood
Date: March 23, 2014 09:37PM

I think I am about 6 weeks away from pulling the original engine and tranny and starting my 5.0 Ford and T5 swap in my 1980 MGB.

I am still struggling a little with clutch "linkage". Is this the way to go for a slave cylinder system?

[www.novak-adapt.com]


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(960 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: ex-tyke
Date: March 23, 2014 10:24PM

That pull type slave might be a solution - the clutch M/C is 3/4" bore, so you'd need the 3/4" bore slave.
Be advised that the clutch fork length might be problematic with tunnel clearance and interference needs to be checked.
A lot of us use a push type slave with about 3/4" cut off the fork end.

Clutch slave 2.jpg


Moderator
Curtis Jacobson
Portland Oregon
(4299 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: Moderator
Date: March 23, 2014 10:37PM

I think the photos in this article do a particularly good job illustrating clearance issues for the MGB/SBF/T5 combination, and how a Nissan truck pull-type slave (like Graham's) helps to solve them: [www.britishv8.org]


Brownwood
Keith Montague

(176 posts)

Registered:
01/25/2014 08:08PM

Main British Car:


Re: Ford 5.0 and T5 clutch actuation
Posted by: Brownwood
Date: March 23, 2014 11:18PM

Ah yes, I see the difference. Any idea what Nissan Truck that part comes from. It looks like the most compact solution.


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(960 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: ex-tyke
Date: March 23, 2014 11:38PM

Keith,
Here's a typical ebay auction for the Nissan clutch slave...Readily available from Rockauto or any major auto parts store.
[www.ebay.com]


Addicted
Mike Hagadorn
Warren PA
(131 posts)

Registered:
09/27/2013 03:46PM

Main British Car:
1976 TR7 Victory Edition Ford 302

Re: Ford 5.0 and T5 clutch actuation
Posted by: Addicted
Date: March 24, 2014 01:53PM

That Nissan setup is a push cylinder, just to avoid confusion (probably obvious). I did something similar, but of course I made it much more complicated and painful than it needed to be. I'm good at that.

Push cylinder does package much tighter than a pull setup.


Graham, Is that your setup? What are you attached to other than the tab below the reverse lamp switch?



Edited 1 time(s). Last edit at 03/24/2014 02:51PM by Addicted.


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(960 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: ex-tyke
Date: March 24, 2014 05:10PM

Second attachment point is the other tab (hole added of course)......evident from another photo angle.

Clutch slave 3.jpg



Addicted
Mike Hagadorn
Warren PA
(131 posts)

Registered:
09/27/2013 03:46PM

Main British Car:
1976 TR7 Victory Edition Ford 302

Re: Ford 5.0 and T5 clutch actuation
Posted by: Addicted
Date: March 24, 2014 08:46PM

Very nice. I decided against that slave cylinder because the bleed fitting was on the bottom, but I should have went with it. Much cleaner. My setup works very well, but the bracket is much crazier.


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(960 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: ex-tyke
Date: March 24, 2014 09:22PM

Quote:
I decided against that slave cylinder because the bleed fitting was on the bottom...

True...but it actually bleeds very well.


pspeaks
Paul Speaks
Dallas, Texas
(698 posts)

Registered:
07/20/2009 06:40PM

Main British Car:
1972 MGB-GT 1979 Ford 302

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: pspeaks
Date: March 25, 2014 11:02AM

After having done this, I don't see how it can be done without shortening the arm. My attempt!


Paul



100_3079.JPG


Addicted
Mike Hagadorn
Warren PA
(131 posts)

Registered:
09/27/2013 03:46PM

Main British Car:
1976 TR7 Victory Edition Ford 302

Re: Ford 5.0 and T5 clutch actuation
Posted by: Addicted
Date: March 25, 2014 06:19PM

That's pretty slick!


pspeaks
Paul Speaks
Dallas, Texas
(698 posts)

Registered:
07/20/2009 06:40PM

Main British Car:
1972 MGB-GT 1979 Ford 302

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: pspeaks
Date: April 03, 2014 11:08PM

My kids, more often than not tell me I'm wrong about everything, so I thought I'd ask. I was told that the actuation rod should be adjusted so the throw out bearing rides against the pressure plate. Is this correct? I had planned to use a return spring like Graham but was told, by the same people, that with the bearing against the plate I didn't need a spring. Being an "Old School" kind of guy I'm a little uncomfortable with that, but as I said, I'm often wrong. What do you think?


Paul


rficalora
Rob Ficalora
Cypress, TX
(2332 posts)

Registered:
10/24/2007 02:46PM

Main British Car:
'76 MGB w/CB front, Sebring rear, early metal dash Ford 302

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: rficalora
Date: April 03, 2014 11:45PM

I'm not sure but I believe it's dependant on the bearing you're using. The one I got did say it was designed to be stay in contact with the plate. I'm going off memory, but I belive it said 4-5lbs of pressure. I don't have a way to measure that so I just adjusted mine to be in light contact. 4.5k miles so could prove to be wrong still, but so far seems to be working fine.


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(960 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: ex-tyke
Date: April 04, 2014 04:22PM

Quote:
I was told that the actuation rod should be adjusted so the throw out bearing rides against the pressure plate. Is this correct?

The Ford release bearing is of the "constant running" variety and is installed with a 4# pressure against the clutch fingers -( no bearing to diaphragm clearance required)
My return spring is installed just for assurance that the whole linkage remains in contact (but in theory not required)


Addicted
Mike Hagadorn
Warren PA
(131 posts)

Registered:
09/27/2013 03:46PM

Main British Car:
1976 TR7 Victory Edition Ford 302

Re: Ford 5.0 and T5 clutch actuation
Posted by: Addicted
Date: April 04, 2014 05:32PM

Great question, and I'm glad to see the answers you guys have offered. My To-Do list has "Decide about return spring for TOB".
Other than wear, I've also seen comments on noise. If it sounds OK, I'll go without one. I used a "Perfection" clutch kit (nothing fancy).



DiDueColpi
Fred Key
West coast - Canada
(1205 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: DiDueColpi
Date: April 04, 2014 10:33PM

If it was me I'd use Paul's linkage and Graham's bracket for the perfect setup.
The return spring is more of a personal preference thing.
Pretty much every throw out bearing available these days is capable of "constant contact" use.
The deciding factor is your slave cylinder.
Most newer designs have an internal spring in them to force the piston out.
This takes up all of the linkage clearance and gives you a constant contact system.
The advantage is no more clutch adjustments and no pedal free play.
The clutch feels much more direct and with no free play the leverage can be increased slightly for a softer pedal.
The down side is a minor acceleration of clutch finger and throwout bearing wear. As well as wear to the clutch arm from the constant movement.
For slaves without the internal spring your only option is the return spring with an adjustable link for free play.
Setting this type of slave up for 0 clearance is an invitation for disaster.
It's called an interference fit. Because when it goes wrong it interferes with your bank account.
The advantage is longer component life.
The down side is regular clutch adjustments and the loss of movement due to the necessary pedal free play.
That probably just muddied up the water. But you know, I gotta say something.

Cheers
Fred


pspeaks
Paul Speaks
Dallas, Texas
(698 posts)

Registered:
07/20/2009 06:40PM

Main British Car:
1972 MGB-GT 1979 Ford 302

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: pspeaks
Date: April 04, 2014 11:51PM

I have a CNC slave cylinder and have no idea if it has a spring in it or not. I've decided to run a spring and connect it to the cylinder bracket. By the way it has a real rod on it now rather than the bolt.



Paul




IMG_0505.JPG


302GT
Larry Shimp

(169 posts)

Registered:
11/17/2007 01:13PM

Main British Car:
1968 MGB GT Ford 302 crate engine

Re: Ford 5.0 and T5 clutch actuation
Posted by: 302GT
Date: April 08, 2014 08:22AM

The CNC slave cylinder does not have an internal spring.


pspeaks
Paul Speaks
Dallas, Texas
(698 posts)

Registered:
07/20/2009 06:40PM

Main British Car:
1972 MGB-GT 1979 Ford 302

authors avatar
Re: Ford 5.0 and T5 clutch actuation
Posted by: pspeaks
Date: April 08, 2014 11:37AM

What are the Pro's and Con's of the CNC not having an internal spring considering an external spring is used? Obviously the external spring keeps the return pressure on the rod so the piston can't retract and the rod fall out. I assume the internal spring pushes the piston back as well???


Paul



Edited 1 time(s). Last edit at 04/08/2014 11:43AM by pspeaks.


Addicted
Mike Hagadorn
Warren PA
(131 posts)

Registered:
09/27/2013 03:46PM

Main British Car:
1976 TR7 Victory Edition Ford 302

Re: Ford 5.0 and T5 clutch actuation
Posted by: Addicted
Date: April 08, 2014 04:30PM

Internal spring pushes the cylinder out, so it does the opposite of a return spring. It make sure the system doesn't go slack, where the external return spring makes sure the sytem does go slack (if it's adjusted with slack in it).
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