dwb1

Caliper on S-2000 has single piston caliper with 2 1/8" piston. Caliper is made out of cast iron (great heat sink) heavy. This is the same system that is on almost every new car. Why does are car stop so good????
light weight
sticky tires
great overall ballance
and a few other things
This type of caliper is very heavy I will post exact weight tomorrow. Cast iron is great heat sink, once it gets hot it stays hot long time. The way this caliper works it pushes against rotor and the other side of caliper is fixed to bracket this squeezes rotor between fixed outboard side and floating side. To make this work it takes quite a bit of fluid to move and over come flex in the part of the caliper that goes up and over rotor, also the part of the rotor that slides on the two pins has clearance between caliper and pin or it would not slide.
RandyP brought up great point, what size piston can stock master cylinder handle.

dwb1

Had to finish this post

In a 4 piston caliper the exact size to replace 2 1/8" single piston would be 1 1/2" 4 piston. If you can find caliper that has very little flex , you will find that larger pistons can be used because you don't have all the extra movement that stock caliper has.

I fit up the third prototype bracket tonight needs one more trip to machine shop and things should be good to go ( or should I say STOP) Tomarrow night I am going to fit up prototype Stainless Steel lines that Earl's made.( check out there web site) Will report back findings of fit and weight of stock caliper . You are going to find out that weight savings on caliper is greater than rotor.

brad
6410

wileecoyote

My friend had developed a front brake system for my S2000 with 17 inch wheels. Last time I told you guys that I would use a Porsche(brembo) 993 4-pistons front calipers and with custom light weight metal hub and 328mm disk (32mm thick).
I only had to wait for my SSR wheels to ship from Japan to complete the final installation as the stock 16 inch wheel doesn't had enough clearance and offset.
This kit can use 45mm offset with 17inch front wheel.
The caliper weight only 4.5lb. and because of using hub with a slotted disk. There is also some weight saving.
My project will be finished in April and if anybody interested please keep me posted. I would get some pics once it is done.
bigger disk means you can stop you car at higher speed.
and a bigger heat capacity and surface for heat dissapation.
It should be an overkill as our S2000 is much lighter than a Porsche 993.

dwb1

I will be interested in your results . Size of rotor that you are using should be heaver than stock . The people that own R-X7's have tried bigger is better with mixed results . Comptech car with Brembo kit takes longer to stop, but says has no fade .Honda's IN-WHEEL-SUSPENSION makes added weight problem for handling .
Luis I thought you might speak up . I have been very impressed with your projects . You put alot of thought in what you do.

brad
6410