Noise from ACE?

My ACE does make a low noise on cornering - the harder the cornering the more pronounced and is from the ACE valve block. Some have said the mounts (or lack of) can cause this as the block uses PWM oscillation to control pressure and transmits the vibration through the chassis. It does not interfere with the operation though.

The vibrations are pump pulses which vary with engine revs and are particularly noticible at very low engine revs with high ACE pressure requirements. The pwm frequency of the pressure regulating valve is much higher and constant.