16v Mini Club Forums  

Go Back   16v Mini Club Forums > General Public Area > General 16v Mini Chat

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 01-05-2018, 03:08 PM   #12
Senior Member
250ptm's Avatar
Join Date: Feb 2010
Location: Tasmania
Posts: 238
Subframe: Other
CC: 1600
Make: Honda
ECU: odb1

Originally Posted by AGoaty View Post
I think the issue is not pressure, but flow. If you want to move the 4 pot caliper pistons, this will take more fluid movement than a single pot caliper. Having a large bore rear needs quite a bit of fluid to move it. Reducing the cylinder size will increase the amount the piston comes out? Am I wrong?

I said earlier that there was a 2 tablespoon difference in fluid displacement. Im revising that comment after more measuring and research.
• 4 pot metro caliper piston diameter 1.414” Area = pi*0.707^2 * 8 = 12.56 sq inches
• 2 pot 8.4” disc mini caliper piston 2.00 diameter. Area =-pi*1^2*4 = 12.56 sq inches
• Fluid displacements are exactly the same.
Also Minisport & KAD 4 pot calipers pistons are exactly the same dimensions as Metro calipers.
This info sort of debunks the idea that the rears cylinders move before the front calipers
If a small diameter piston is completely free to move without any restriction, it will move more for any given pedal travel than a larger diameter one. However it is restricted by the drum and because of its size produces less pressure
It only took me 3 years to reach 100 posts and become a senior member!
250ptm is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT. The time now is 05:43 AM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.