Originally Posted by PaulT

The jet between the compressor and amal valve (C on the amal valve) controls the boost spike, the jet
presents a a restriction to the inrush of air to the actuator. Larger jet hole less spike smaller jet hole bigger spike.
I run a std amal valve jet in this port 2mm i think

The jet in the vent port (R on the amal valve) which vents to the air box controls the held boost. The jet dictates
the bleed rate of air from the compressor/actuator circuit. small jet hole less held boost, larger jet hole more held
boost.

My set up uses a -31 actuator half mooned on the preload 2mm jet in c port 2.5mm in r port it give a 18 psi spike and held 16psi


Cheers PaulT