Any Other Differences

[85ttops]

BELIEVE ME I SEARCHED .



is there any other visible differences between the svo specific brake master cylinder and a standard mustang master cly , beside svo being aluminium .

i want to make sure the ttop car has the correct master cyl . i will be driving it soon

[8T6 SVO]

Post a picture - that will help. I've got an original one in my car and a NOS one to reference.

[Ken Potter]

Hey you're back

I don't know of any outside differences. Here are a couple of pics for references.

P.S. I have dimensions / installation pics for the louvers if you want them?

[BlueCASVO]

I researched this awhile ago also. Visibly I don't think there is a difference, except as you say the SVO one is aluminum. Internally the SVO has a 1 1/8" bore for the plunger thingy, where the regular Mustangs are 7/8". I think the bigger bore is because it takes more pressure to clamp 4 sets of disc brake pads to the discs than it does for a disc/drum setup, which is on other fox cars.

If you used the regular mustang master cylinder, the pressures out of each bowl would be different, and the proportioning valve would not work correctly, causing your brakes front-to-rear to not engage correctly; either your fronts or your rears would lock up way too soon.

You can get an iron SVO master cylinder, 1 1/8 bore, four wheel disc brakes, from your local parts store for anywhere from $20-$40. Someone is selling a "professional grade" master cylinder for SVOs - I think it was Bendix - for $200, but I don't know why it is so much, I never looked at one because it was always a special order.

Other than the slight color difference, and anyone that knows metals can probably tell the difference between an aluminum and iron one, there's no real difference. Reman units usually have some numbers stamped in the front, whereas the originals did not.

My two cents...

Oh, and I think the original M/C top lid is supposed to be that gold finish (anodized maybe?) or silver. The reman units I looked at all have tops that come in a matte dark gray...

[Pat_in_L.A.]

I think the original M/C top lid is supposed to be that gold finish (anodized maybe?) or silver. The reman units I looked at all have tops that come in a matte dark gray...

The SVO master cylinder reservoir cap is a different size than others and is not interchangeable.

[85ttops]

did an aluminium one come in any other fox mustangs besides the cobra-r

[85ttops]

Hey you're back

yeah im still kicking , very , very long story . that ends with a devorce for yours truely

[Horsewidower]

Good to see that you're back. These are trying times.

[Ken Potter]

yeah im still kicking , very , very long story . that ends with a devorce for yours truely

Very sorry to hear that. I figured something was going on and wasn't going to bother you. I'm kinda far away but if there is anything I can do to help let me know.

[Ken Potter]

did an aluminium one come in any other fox mustangs besides the cobra-r

Good question. I guess if there was another it would have to be equipped with 4 wheel discs from the factory and be a 79 to 93 model. I can't think of any other Mustangs that meet that requirement.

I know the MC I used for my 66 fastback was from something like a 77 F-150 since I wanted the lines to come out on the fender side and have a big enough piston to push the 4 wheel discs. It is cast iron though...

[Jose O]

yeah im still kicking , very , very long story . that ends with a devorce for yours truely

hello Mike I know I don't talk to you that much or post a lot on this forum, I'm very sorry to hear what youre going through, Mike will a PE computer cheer you up I know you been looking for one send me a pm. Jose O

[vrinner]

yeah im still kicking , very , very long story . that ends with a devorce for yours truely

Sorry to hear about that Mike....hang in there...call me if you need to chat.

[Otto Man]

First, I am sorry for you misfortune. Good luck down the road.
Second, here are pic's of an NOS I got a while back. It's on the car now and like an idiot I tossed the original.

[svobrad]

Alum. versus iron

Had a new brake system installed in my newest SVO mainly because I do not like driving on someone elses lack of maintenance.
All new rotors, calipers, brake lines and master cylinder.
After a month of hardly driving the car I noticed the master cylinder was all rusty.
The rebuilder did not paint the master cylinder so rust started fast. It was so clean when it was installed thought it was aluminum.
Replaced it with the proper alum. master cylinder.
I would think Ford wanted the alum. for weight savings.
Oh, the torx bolts holding the rear brake lines on took about an hour to get out, even after soaking them with WD40. Had to use a chisel. Went to a hex bolt to install new rear brake lines.

[gbeaird]

Our 86 has the replacement iron, IIRC. Are the aluminum ones available? I get all tingly all over when it comes to weight savings. ;-)

Gene Beaird,
86 2R SVO, G Stock,
Pearland, Texas