Anybody know where I can find the table comparing "swept area" for Wrx front calipers of various years? I have '02 WRX calipers on front of my 818S, need to decide which calipers to use to improve rear beaking.
anybody know where i can find the table comparing "swept area" for wrx front calipers of various years? I have '02 wrx calipers on front of my 818s, need to decide which calipers to use to improve rear beaking.
tom on one my 818 i used 06 legacy gt front and rear rotors and calipers lot bigger and rears are vented and bolt right on
Is the Legacy GT front caliper larger than my current '02 WRX front rotor? I already have H6 rotors in rear of my 818, I would like to be able to use them.
What about the diff. in piston area between 2 pot and 4 pot front calipers?
The impreza 2 piston sliding caliper has 1.685 diameter piston. Which is 2.230 square inches times 2 is 4.460 square inches.
The master cylinder is 1.0625" diameter piston. Which is 0.887 square inches.
Master cylinder to caliper squeeze gain is 4.460/0.887 = 5.030
The wrx 4 piston fixed caliper has 1.591 diameter piston. Which is 1.988 square inches times 2 is 3.976 square inches.
The master cylinder is 1.0" diameter piston. Which is 0.785 square inches.
Master cylinder to caliper squeeze gain is 3.976/0.785 = 5.062
As you can see the caliper squeeze force gain is very close between an impreza and impreza WRX.
Bob
Last edited by Bob_n_Cincy; 04-19-2019 at 12:19 PM.
Anybody know where I can find the table comparing "swept area" for Wrx front calipers of various years? I have '02 WRX calipers on front of my 818S, need to decide which calipers to use to improve rear beaking.
i'm running 06 front calipers at all 4 corners. sti rear rotor. had to make spacers, re locate mounting holes, and have ebrake shoes made. if youre handy, I guess this is the cheapest way to get big rear brakes.
i'm running 06 front calipers at all 4 corners. sti rear rotor. had to make spacers, re locate mounting holes, and have ebrake shoes made. if youre handy, I guess this is the cheapest way to get big rear brakes.
I have the same as 20boxer except I am running the DBA rear rotors. Just to be clear, we are running the 2 pot sliding front calipers on all four corners. I have run about a dozen track days with no problem with any brake fade. This setup gives me 150% of braking capacity over standard Impreza with a car that weighs about 60% of a standard Impreza. I am using some Powerstop street performance pads. The have plenty of grip but do emit a lot of brake dust. https://www.powerstop.com/product/power-stop-z26/
Last edited by Bob_n_Cincy; 04-20-2019 at 08:34 PM.
I will be ordering a pair of two pot front calipers to use in the rear over the H6 rotors that I already have. I know that I will have to re-drill the mounting holes in the rear backing plates and use spacers in the rear calipers to avoid having the pistons run out of travel. I will also trim some friction material from the outside of the rear brake pads so they don't overlap the outer edge of the H6 rotor. Anything else?
I will be ordering a pair of two pot front calipers to use in the rear over the H6 rotors that I already have. I know that I will have to re-drill the mounting holes in the rear backing plates and use spacers in the rear calipers to avoid having the pistons run out of travel. I will also trim some friction material from the outside of the rear brake pads so they don't overlap the outer edge of the H6 rotor. Anything else?
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Originally Posted by tmoretta
