I have purchased a set of Mach 1 calipers with brackets and was wondering if there is anything else needed other than the 13" rotors. Earlier posts made reference to kit M-2300-Q but that part is no longer in the FRPP catalog. Was that a rotor and caliper kit or did it include other hardware?
Mach 1 Caliper Install/Upgrade
- Thread starter toyman
- Start date
Husky44
10 Year Member
I won't swear to this, but you'll most likely need different banjo bolts, if not new lines. When I did my swap, I went ahead and put in braided SS lines to the caliper. IIRC there's a different thread pitch from the stock calipers to the new ones. SS braided lines aren't that expensive, and it's an easy "while I'm at it" change.
It's a complete kit with everything you need to make the switch
Ford Racing Brake Kit for 1994-95 SVT Cobra [M-2300-Q] - $559.95 : Powered By Ford - Your only high performance parts supplier for your Ford car or truck, When you want it done right and done well there is only one Powered By Ford!
Everything you need is pictured including the cobra specific master cylinder. If you already have a tube flare kit and know how to use it, you will have to switch the MC lines to the prop. valve. Or take the easy route and buy MM's swap lines Master Cyl. Adapter, 94-95 Cobra M/C, 94-95 w/Stock Prop. Valve [MMBAK-7] : Maximum Motorsports, the Latemodel Mustang Performance Suspension Leader!
Best $20 I spent.
I'm a little confused. Is it necessary to change the Master Cylinder? I didn't think that was necessary. The adapter from MM is to connect the Cobra MC to the GT proportioning valve. Is that correct?
nmcgrawj
Advanced Member
LRSjmac
Premium Sponsor
GT- 1 1/16 bore
Cobra- 15/16 bore
GT needs a higher fluid pressure to compensate for the single piston caliper. The Cobra MC uses less fluid pressure since it uses a dual piston caliper. My theory, if you have the stiff pedal (GT MC) you can't be using the cobra brakes to there full potential at all. You'd be better off leaving the stock brakes on there, it would stand to reason you would be overloading the brake system.
nmcgrawj
Advanced Member
Are you certain you have that correct? If the force applied is a constant the pressure should be greater with the smaller bore. The dual piston caliper I would think is better because the force applied is more evenly distributed across the larger pads. In my case, I'm trying to improve the braking as I'm starting with a smaller (lower) vacuum assist due to my cam.
I'm thinking it's like the heel of a shoe exerting pressure on the floor. If you had a 100 llb person standing in a 1 sq in heel the pressure on the floor would be 100 psi (100lb/1 sq in). However, if the heel were reduced to 1/2 sq in the pressure would increase to 400 psi (100lb/.25 sq in). I think that's the same principle used in hydraulic jacks.
nmcgrawj
Advanced Member
That makes sense richard. But why is the pedal stiffer with the bigger mc?
It seems the GT MC would need more pedal travel to equal the higher pressure of the cobra mc.
It seems the GT MC would need more pedal travel to equal the higher pressure of the cobra mc.
That's what I'm not understanding, it would seem the GT MC would be to soft and drop to the floor.
nmcgrawj
Advanced Member
Less mechanical advantage?
I'm not certain that pedal travel is important unless you are bouncing off the floor. Pedal travel will be determined by the volume of fluid needed to move the pistons and in turn the pads to full contact with the rotors. This may be where the proportioning valve comes into play but IDK for sure.
Ran into this on my Cobra conversion. The fittings on the prop valve are different sizes, and are swapped on the Cobra. You could technically bend the hard lines to switch them, but then you'd unbalance the brake pressure front to rear. Remember, it's a proportioning valve - more pressure to the front brakes, which do most of the work on a front-heavy car. Supposedly this fitting swap was done by Ford to keep from installing the wrong master cylinder on the assembly line.
It's my understanding that the coupling threads are different on the Cobra MC and that's why an adapter kit is available. Post #2 by Husky44 indicated that the thread pitch is different on the Cobra MC.
