I believe the concept is that with the same force applied you get a bigger braking area from the larger discs and pads thus giving a stonger braking perfomance. I think

Thought about a Decent set of Pad's and Disc's???

We just fitted RDA Slotted Rotors and Pro Street Pad's to my girls Jimny and it stops on the dime now. also readjusted the rear brakes whilst i was at it. and rebuilt the drum cylinders.

i cant seem to find a rear disc conversion on there website,
i would love better brakes, the 31s just make those little brake work so hard

Bigger calipers on bigger rotors means more contact area when applied= more stopping.

Slotted rotors means cooler temps which means better braking (not always you can go too cold but thats more to do with the pad than rotor)

Smaller MC in relation to you new bigger calipers means they dont push enough fluid.. loss of pedal feel and possible loss of braking depending on sizing.

First stop is change the fluid with some higher end stuff. And get a good quality pad. After that I'm no help sorry.

will just end up with more efficent braking, heat disspersent/ and no glaze pads. but still no improvement in braking strength that actually stops the car.

its like me slapping you in the face with my standard arm and hand. Then slapping you in the face with a bigger hand but standard size arm still same strength slap, just more area hit. need bigger muscle to increase more pain.

Someone correct me if I'm wrong.

But in my experience that bigger muscle is your foot pressing a mushy horrible feeling pedal if you only upsize the caliper. Upgrading the brakes with the correct sized MC you will keep the ratio's between everything right for nice pedal travel/feel and good braking.

Bigger caliper means more fluid movement/displacement needed to press the pad against the rotor.. You get this to a point from the pedal. and then you need to upsize your Master Cylinder... You still end up with the same pressure as the lines, pedal stroke/ratio are still all the same, just more fluid is displaced to account for the bigger caliper.

When you go bigger again, and start getting into high end full custom stuff. Then pedal ratio's, line sizes etc is where it gets alot trickier.

Don't take that as gospel, just my experience and understanding.

bigger PISTON requires more fluid to move a given distance so for the same master cylinder the pedal will move more and feel less solid (but some would say ore progressive) it will also squeeze the pads harder for a given pedal input so its a trade off

Apparently Piranha make a rear disc conversion. Don't know how much...

- Tim.