What's with tapered pistons?

[Wraggy]

From Ronny who makes the Ghea Tapered Pistons

Hi Guys,

When we first started making pistons I was not sure how they really worked,so I figured that I had to measure them to fully understand what happens.

With some help from a friend we started to build this machine for measuring low to high speed damping forces and we can also simulate different pack situations.

When you measure for example a 16mm big bore piston from low to high speed you will find them to be quite linear up to the high speed area where the damping force gets more progressive.

With our pistons we make the damping force more linear than standard pistons and that's what make the cars calm down.

Today we are testing what we call "pack control" that means you just change oil with outside temperature to get the right low speed damping and choose the piston depending on what high speed damping you need.

Thanks/Ronny Guta
GHEA