Manual brake cyl and caliper selection.

[total newb]

Gathering up stuff for totalgirlfriends cj5 build. I need to pick a manual brake cyl and calipers.

Gona use the d52 calipers 10b/d44 common fare setup. I know they came in a couple/few piston sizes and to date its never mattered to me. But this is wholey new ground.

I have
d44/14bff with standard rotors
6:1 pedal assembly
37" h1 tires
5.13 gears
sbc/465/203/205

I dont really know and am having a finding the specific sizes of the calipers.
i want to say 2-13/16 and 3-1/8.

i also dont even know where to start for master size.

I need the measurement before i run to billavistas calculator

 

[Bebop]

Good luck making anything work properly with a 6:1 pedal.

 

[total newb]

Because.....?

Im not dead set on these. I have a set of gm truck pedals aswell

 

[Bebop]

Pedal ratio is too small.

Watch this and play with the calculator.

https://www.youtube.com/watch?v=xwzkFO_zv1E

Or read this and play with the calculator again.

http://www.billavista.com/tech/Articles/Brake_Bible/index.html

 

[Wisconsinite]

This is what I am using on my build. It is 10:1

https://www.wilwood.com/Pedals/Pedal...emno=340-15677

Just FYI.

 

[total newb]

Ok. Thanks for the leads.

 

[total newb]

So just for info

73 k10 d52.......2.81"
91 k2500 d52....3.03"

I was planning to use billas calc but needed the measurements to play with.

 

[TTMotorsports]

I ran the loongest pedal CNC brake years ago and it was like 12 :1 ratio. GM rear brakes and 7/8" MC worked decent but not as well as power assist brakes that's for sure.

 

[Adamwende]

Make a new pedal. That’s what I did.

 

[Bebop]

Make a new pedal. That’s what I did.

What ratio pedal you ended up with and what masters/calipers are you running ?

 

[Adamwende]

Not sure on the ratio, but both my masters are 7/8s, with four piston Toyota calipers.

 

[Adamwende]

I also run two pedals, one for the front, one for the rear.

 

[Bebop]

Would you mind measuring the ratio and the throw you end up with, when you have time ? Thanks

 

[ColoradoLizard]

I have the same calipers in the rear, 10:1 pedal, 7/8 master. I have a separate pedal for the fronts, wilwood calipers, 3/4 master

 

[Bebop]

10:1 pedal

OMG !!!
How long is that unit ?!!!

 

[total newb]

Was thinking the same omg holy shit.
seemed way more than i remembered. Reading back through billavusta artical. His in for says 6-7:1 for manual brakes which is what i recalled.

 

[ColoradoLizard]

Was thinking the same omg holy shit.
seemed way more than i remembered. Reading back through billavusta artical. His in for says 6-7:1 for manual brakes which is what i recalled.

I am probably not recalling the ratio right, the pedals are 14" long

 

[Bebop]

I am probably not recalling the ratio right, the pedals are 14" long

That sounds plausible.
That's some huge pedals lol