mikeb75
07-16-2014, 03:34 PM
Need advise from the brain trust here, I've installed the Wilwood 2 pedal kit on my frame and am trying to math out what size master cylinder bores to use.
In the front I'm running 4 piston Wilwood superlite caliper with a calculated piston area of 4.01 in-sq :
1.6" diameter piston
pi * (r)sq * # piston on 1 side of caliper
3.14 * (.8 * .8) * 2
In the rear I have the OEM WRX single piston brake caliper with a calculated piston area of .785 in-sq:
1.0" diameter piston
3.14 * (.5 * .5) * 1
I did ask Wilwood and they recommended 3/4" front and 7/8" rear; but I think I screwed up my math before I sent them the info (forgot to square the radius of the piston).
Based on a table here: http://www.outlawdiscbrakes.com/faq.html the rear caliper piston area of .785 matches up with a 1 inch bore, but there is no match for the front caliper piston area.
I'm officially out of my depth now! Throwing numbers out, would 7/8" front and 1" rear work?
Thanks for the advise!
In the front I'm running 4 piston Wilwood superlite caliper with a calculated piston area of 4.01 in-sq :
1.6" diameter piston
pi * (r)sq * # piston on 1 side of caliper
3.14 * (.8 * .8) * 2
In the rear I have the OEM WRX single piston brake caliper with a calculated piston area of .785 in-sq:
1.0" diameter piston
3.14 * (.5 * .5) * 1
I did ask Wilwood and they recommended 3/4" front and 7/8" rear; but I think I screwed up my math before I sent them the info (forgot to square the radius of the piston).
Based on a table here: http://www.outlawdiscbrakes.com/faq.html the rear caliper piston area of .785 matches up with a 1 inch bore, but there is no match for the front caliper piston area.
I'm officially out of my depth now! Throwing numbers out, would 7/8" front and 1" rear work?
Thanks for the advise!