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12-27-2009, 03:14 PM
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CC Member
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Join Date: Oct 2007
Location: Near Emerald,
Qld
Cobra Make, Engine: Evans kit, 6 litre, 6 speed, Jag F/R,
Posts: 365
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Not Ranked
6 speed clutch master cylinder
Hi crowd, hope you all had a productive and relaxing christmas.
I was wondering what bore and stroke cylinder I will need to operate the clutch on the T56 6 speed box.
If anyone can suggest a commonly available (donor car) one, or a simple aftermarket one it would be helpful.
Thanks
__________________
Missed my Cobra budget by thaaaat much.
Ya get that on big jobs.
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12-27-2009, 03:31 PM
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CC Member
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Join Date: Nov 2009
Location: Cheltenham,
Vic
Cobra Make, Engine: Classic Revival CR3516, LS3, Aussie Mike'd T-56, 3.70 LSD, AP brakes, Penske shocks
Posts: 1,616
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Not Ranked
a VT series II - VE Commodore donor leaps to mind, as all 5.7/6.0 manuals used that box.
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12-27-2009, 05:41 PM
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CC Member
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Join Date: Feb 2008
Cobra Make, Engine: HARRISON, FORD 302, SOLD
Posts: 771
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My local clutch/brake guy supplied mine for the T56. Sorry can't remember specs, but a newy wasn't much more than used, same for the brake master cyl.
I had nowhere easy to put the resorvoir under the dash so it's located on the little flat shelf under the bonnet near where the bonnet catches are.
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12-27-2009, 06:34 PM
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CC Member
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Join Date: Mar 2008
Location: Gold Coast,
QLD
Cobra Make, Engine: Harrison #69, HSV LS2, T56, Custom rear suspension
Posts: 604
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Had a Commodore master cylinder but it kept weeping. Swapped it out for a Tilton and no dramas since.
Cheers
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Geoff
Cobra Car Club of Qld - UAE Chapter
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12-27-2009, 08:02 PM
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CC Member
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Join Date: Jan 2001
Location: Sunbury,
VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
Posts: 5,391
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You will need to move about 10cc of fluid to disengage the clutch. That means a 7/8" or 1" bore MC. I'm using a 7/8" bore Wilwood MC and the clutch is nice and light. The 7/8 has a slightly longer stroke than the 1" version and they both move about the same volume of fluid for the full stroke.
http://www.wilwood.com/Products/006-...CRMC/index.asp
Cheers
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Mike Murphy
Melbourne Australia
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12-27-2009, 10:40 PM
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CC Member
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Join Date: Nov 2009
Location: Cheltenham,
Vic
Cobra Make, Engine: Classic Revival CR3516, LS3, Aussie Mike'd T-56, 3.70 LSD, AP brakes, Penske shocks
Posts: 1,616
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Not Ranked
Mike are you using that in combination with Commodore style slave cylinder?
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12-27-2009, 10:58 PM
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CC Member
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Join Date: Oct 2007
Location: Near Emerald,
Qld
Cobra Make, Engine: Evans kit, 6 litre, 6 speed, Jag F/R,
Posts: 365
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Thanks for the input guys.
At a quite affordable circa $130 I think the Willwood will/would be the choice.
__________________
Missed my Cobra budget by thaaaat much.
Ya get that on big jobs.
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12-27-2009, 11:27 PM
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CC Member
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Join Date: Jan 2001
Location: Sunbury,
VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
Posts: 5,391
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Yep, I'm using the stock T56 Hydraulic throwout just modified for a braided line.
Cheers
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Mike Murphy
Melbourne Australia
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12-28-2009, 04:21 AM
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CC Member
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Join Date: Dec 2003
Location: Framingham,
Ma
Cobra Make, Engine:
Posts: 228
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Hi Mike,
I stock new OEM masters & slaves or hyd throw out bearings. I also make stainless steel -4 an fittings.
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Forte's Parts Connection
40 Pearl St
Framingham, Ma. 01702
fortesparts.com
508 875 0016
In 1993 Mike made the first conversion of a Ford Tremec to GM 5-speed. It bolts to stock bellhousings w/out an adapter. The FE Tremec, the Mustang adjustable quadrant are originals from Mike.
One of 12 Tremec Elite Distributors worldwide for: T-5, T-56 Magnum & TKO-500 & TKO-600 ,Midshifter, Frt shifter, offset Vette shifter.
Est: 1981 selling performance parts to build your dream car...
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12-28-2009, 03:41 PM
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CC Member
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Join Date: Jan 2001
Location: Sunbury,
VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
Posts: 5,391
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Quote:
Originally Posted by mikeforte
Hi Mike,
I stock new OEM masters & slaves or hyd throw out bearings. I also make stainless steel -4 an fittings.
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AN#4 line is a must. A couple of us tried AN#3 lines initially but the smaller line doesn't flow well enough to let the clutch engage quickly and you get clutch slip.
Cheers
__________________
Mike Murphy
Melbourne Australia
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12-28-2009, 11:30 PM
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CC Member
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Join Date: Oct 2007
Location: Near Emerald,
Qld
Cobra Make, Engine: Evans kit, 6 litre, 6 speed, Jag F/R,
Posts: 365
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I assume you mean 1/4 inch ID Mike?
As in dash 4 = 4 over 16
Equals 1/4"
Different hydraulic mobs can have different numbers from my past (recent and local)experience.
Some call the same thing a 7/16".
AN is probably the ISO term that our local hydraulic mobs don't always follow.
Regardless, they would probably not have appropriate hose. Would 'Synflex' be sufficient for the pressure and suitable regards degredation fron the brake fluid? It is used widely in mining applications here.
__________________
Missed my Cobra budget by thaaaat much.
Ya get that on big jobs.
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12-29-2009, 04:29 AM
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CC Member
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Join Date: Jan 2001
Location: Sunbury,
VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
Posts: 5,391
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Not Ranked
AN stands for Army Navy and is used a lot in motor sports. It has a 37 degree taper rather than 45 like a lot of fittings. I believe they are interchangeable with JIC but I'm not sure on the sizing conventions.
I used Speedflow fittings http://www.speedflow.com.au/hoseends.html Good Quality Locally made too.
The ends are PN: 201-04
http://www.speedflow.com.au/hoses.html
Hose is teflon lined and rated to 1500PSI. PN: 200-04
NB is actually closer to 3/16"
It's stainless braided and I think they can supply it with a protective plastic cover too but I just went for the plain stuff.
Cheers
__________________
Mike Murphy
Melbourne Australia
Last edited by Aussie Mike; 12-29-2009 at 05:58 AM..
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12-29-2009, 05:44 AM
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CC Member
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Join Date: Dec 2003
Location: Framingham,
Ma
Cobra Make, Engine:
Posts: 228
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Hi,
Like Mike said above it is -4 AN = 1/4" ID line.
__________________
Forte's Parts Connection
40 Pearl St
Framingham, Ma. 01702
fortesparts.com
508 875 0016
In 1993 Mike made the first conversion of a Ford Tremec to GM 5-speed. It bolts to stock bellhousings w/out an adapter. The FE Tremec, the Mustang adjustable quadrant are originals from Mike.
One of 12 Tremec Elite Distributors worldwide for: T-5, T-56 Magnum & TKO-500 & TKO-600 ,Midshifter, Frt shifter, offset Vette shifter.
Est: 1981 selling performance parts to build your dream car...
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12-29-2009, 05:57 AM
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CC Member
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Join Date: Jan 2001
Location: Sunbury,
VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
Posts: 5,391
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Not Ranked
I think the convention 4 on16 is right but a lot of the hose specs I see have an actual inside diameter smaller than than 1/4" or 1/2" etc.
Any idea why? Is it based on the need for a tight fit over a standard size barb?
I've bought SpeedFlow, Russell and Earls in the past and they are all smaller than the nominated size. Russel for example quote 7/32" ID for their 1/4" #4 line.
Cheers
__________________
Mike Murphy
Melbourne Australia
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12-29-2009, 05:06 PM
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CC Member
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Join Date: Oct 2007
Location: Darwin,
NT
Cobra Make, Engine: Classic Revival Kobra,LS7 427
Posts: 380
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Not Ranked
The AN dash series is the OD of alloy pipes, so all -4 alloy pipes are 1/4 inch OD otherwise you would need differnt sleeves for 25thou, 32thou and 53thou alloy pipes.
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12-30-2009, 01:43 AM
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CC Member
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Join Date: Jul 2008
Location: Melbourne,
Vic
Cobra Make, Engine: Harrison, VE L98 + T56
Posts: 164
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Not Ranked
Master cylinder & a T56 question.
I have used a Toyota Hi Ace cylinder. It disengages the clutch OK but I have not tried it with the engine running, just turning the tail shaft by hand.
Sorry to Hi Jack this thread but Mikeforte says he is an agent for Tremec T56 Question please Mike? Why does the box in my car (SS Commodore), and my Cobra T56 say to fill it with oil higher than the inspection hole. Aussie Mike has a theory it's to shut up the noise a bit, is this true. Peter. 
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Life is what happens to you while you're busy making other plans...JWL
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01-01-2010, 03:11 PM
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CC Member
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Join Date: Oct 2007
Location: Near Emerald,
Qld
Cobra Make, Engine: Evans kit, 6 litre, 6 speed, Jag F/R,
Posts: 365
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Not Ranked
Good question Stumpy, one I hadn't been aware off.
__________________
Missed my Cobra budget by thaaaat much.
Ya get that on big jobs.
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