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Let's talk master cylinders

2.6K views 16 replies 9 participants last post by  ultrastang  
#1 ·
Hey guys well after replacing my third booster last week I am ready to go back to a master cylinder without a booster. Also I am converting to a manual from automatic and want to make sure I have room for the hydraulic master cylinder.

What do you guys recommend which master cylinder to use?? I am doing my research but I want to here your opinions.

Oh yeah I have a 67 coupe with granada brakes.

I have looked at the JMC M/C and I am interested in that one. I have read it's hard to adjust.

Any ideas or suggestions on any MC you guys use?
 
#2 ·
If you're running manual brakes, you'll have plenty of room for the hydro. clutch setup. it's when you add a booster that things get interesting. For a disc/drum car, I'd just use a 74 Maverick MC with the Mustang pushrod. I've heard the JMC MC gives a hard pedal and besides, $22 beats $350 anyday. :D
HTH
--Kyle
 
#3 ·
Actually I would go for the aluminum SVO M/C before id go for cast iron. However, i would go for one with a pastic reservior first. The problem is, I don't know of an easy plastic one.

We are talking about halving the weight, and then having it again by going to the plastic res. If you don't care about weight, well then there are a lot of options.
 
#6 ·
LMan said:
Wilwood MC = $120.00

SVO MC = $20 from OReillys


"You make the call!"
The problem with the SVO MC is the 1 1/8" bore. It makes for a harder pedal and less modulation. I guess there is a 13/16", but I see that as being too small. If I were to do it over, a 1" diameter cylinder is what I would look for. From another site I found this:

'93 Cobra - 1.00" bore
'94-98 V6/GT - 1 1/16" bore, stock plug in for the low fluid sensor
'94-95 Cobra - 15/16" bore, stock plug in for low fluid sensor. Ports are reversed thread sizes from V6/GT
'99 V6 - 1.00" bore. can be converted to work for the low fluid sensor on the fox3 cars

I am not sure how these would work in a vintage application.
 
#7 ·
I hear what you are saying. Im fabbing up a brake system for my '68 track car and am going through the same thought process. I have a 93 Cobra MC on hand but the hassle of the metric fittings is irritating me at the moment, so I may give the SVO MC a shot and see how good/bad it is.
 
#10 ·
I bought my Disc/Disc MC from Mustangs Plus, probably pulled a midlife and paid to much, but after I spoke with baer (didnt like the look of the plastic reservoir) they suggested at least a 1 inch bore. The guy at Mustangs plus confirmed the bore and thats what i ordered. The baer MC with the plastic resvoir had the lines on the wrong side anyways. Probably should have gone to Autozone or where ever and got the SVO unit and saved some coin.

BTW- The SSBC billit piece is a thing of beauty, but at $385........

http://www.stainlesssteelbrakes.com/images.250/254.jpg
 
#13 ·
The '84-'86 Mustang 4-wheel disc SVO MC (same thing as '84-'90 Lincoln Mk VII MC) Has a fairly large bore diameter (1.125" --[1-1/8"]). It will work without a brake booster, but expect to exert more leg force on the pedal to actuate it if no booster is used.

Photo of a Mk VII/SVO MC I installed in a '65 Mustang without power assist:
1. http://www.ultrastang.com/Images/Scanned/June2002/09-s.jpg

2. Later, changed the setup to include a brake booster (2.3L Fox Mustang brake booster);
http://www.ultrastang.com/Images/Scanned/June2002/01-s.jpg

More info on this in following link;
http://www.ultrastang.com/Ultrainfo.asp?Page_ID=15

One drawback with the Mk VII/SVO MC is its length (~8-1/8" long). If you are running a brake booster, the depth (thickness) of the booster becomes pretty important for MC-to-shock-tower clearance. Granada disc/drum MC on left. Mk VII/SVO MC on right;
http://www.ultrastang.com/Images/Scanned/June2002/11-s.jpg

This is a photo of a '94/'95 SN-95 Mustang V6 MC I installed in a '65 fastback, with a 2.3L Fox brake booster. The MC's length is ~ 7-1/2", and the piston diameter is 1.125"
http://img164.imageshack.us/img164/6857/65052vs9.jpg


This is a photo of an SN-95 V6 MC ('95/'95 model, without reservoir), shown in a '68 Mustang with a Fox Mustang 5.0L version brake booster;
http://img285.imageshack.us/img285/8031/foxboostermkviisn95mc003editedqj6.jpg

This is a photo of a MK VII/SVO MC in a '68 Mustang with a Fox 5.0L booster. I had to slightly clearance the MC by chamfering the left front edge of the MC's "snout", but it did clear the shock tower without touching;
http://img285.imageshack.us/img285/685/foxboostermkviisn95mc002kn9.jpg

I've adapted SN-95 Cobra 13" front discs to my '68 ['75 Granada spindles, --my own adapter bracket design];
http://img75.imageshack.us/img75/5456/g2con68006uo0.jpg

...with the Cobra 11.65" rear rotors ['80 Monarch 9-inch rear end --again with my own adapter bracket design];
http://www.ultrastang.com/images/2006/cobrabrakehosemount0243cf_2.jpg

My '68 currently has the 5.0L vacuum booster from a '90 Fox Mustang GT. In order to get the full potential out of the Cobra front and rear brakes, this will likely be going in in the future [SN-95 Mustang Hydro-boost brake unit];
http://img45.imageshack.us/img45/883/hydroboostep0.jpg


www.ultrastang.com
 
#15 ·
LMan said:
That's the problem with Steve....never brings the tech! *wink*
I'm sorry. I admit, I was vauge on that response, and could have exerted a little more effort and done much better than what I did. I will try to do better in the future. :p


www.ultrastang.com
 
#16 ·
Ultrastang, two things:
In your link for the 94/95 V6 Mustang M/C, it shows two adapters into the body of the M/C. Do you know where they are available, and if the outside of those adapters is SAE?
Secondly, is this M/C for disc brakes? I don't really follow the newer mustangs at all, but I'm surprised a 12 year old V6 would have had 4 wheel disc.
Thanks
http://img164.imageshack.us/img164/6857/65052vs9.jpg
 
#17 ·
gsxrken said:
Ultrastang, two things:
In your link for the 94/95 V6 Mustang M/C, it shows two adapters into the body of the M/C. Do you know where they are available, and if the outside of those adapters is SAE?
Secondly, is this M/C for disc brakes? I don't really follow the newer mustangs at all, but I'm surprised a 12 year old V6 would have had 4 wheel disc.
Thanks
http://img164.imageshack.us/img164/6857/65052vs9.jpg
Very few '65-'73 Mustangs had front disc brakes, but none of the '65-'73s had factory rear discs.

All Fox-bodied Mustangs from 1979-1993 had front discs, but only two of those models came from the factory with 4-wheel discs --the '84-'86 2.3L turbocharged SVOs (5-lug), and the '93 Cobras (4-lug --except the '93 Cobra Rs had 5-lug rear discs).

Starting in 1994, ALL Mustangs came from the factory with 4-wheel disc brakes as standard equipment --this includes even the 6-cylinder models.


In 2004, I was designing/making some adapter brackets in an attemp to adapt them to the early Ford 8- & 9-inch small bearing rear end housings. A friend of mine, I've known since grade school, agreed to let me use his '65 fastback as a guinea pig to try and adapt the rear disc brakes from a '95 V6 Mustang onto the 8-inch rear end under his '65.

During that time, I was looking for a 4-wheel disc MC to use in conjunction with the factory K/H 4-pistion front discs, and the SN-95 rear discs I was trying to adapt. I went with the SN-95 V6 MC, because the SN-95 GT MC's reservoir has a steep downward angle to it if mounted on a booster that's more or less oriented to position the MC in a horizontal plane.

I looked all over to try and find the correct ISO metric bubble flare fittings to work with the SN-95 MC ports, but could not locate what I needed. So, I had to settle for using some bubble flare-to-SAE inverted flare adapters.

Since that time, I now have a source to get the correct ISO metric bubble flare fittings as well as specialty SAE inverted flare fittings for 3/16" brake tubing that most parts stores do not carry. I have both metric bubble flaring tools and SAE inverted double flaring tools, so this allows me to work on either type of connections.

The adapters I used in '04, on the SN-95 MC in the '65 fastback, had metric male threads on the side that screws into the MC ports, and had SAE inverted flare female threads to fit 3/8"-24 male fittings. The adapters were Edelmann p/n 265000 & 271300.

--Steve